DS26334
3.3V, 16-Channel, E1/T1/J1 Short-
and Long-Haul Line Interface Unit
www.maxim-ic.com
GENERAL DESCRIPTION
The DS26334 is a 16-channel short/long-haul line
interface unit (LIU) that supports E1/T1/J1 from a
single 3.3V power supply. A single bill of material can
support E1/T1/J1 that requires no external
termination. Redundancy is supported through
nonintrusive monitoring, optimal high-impedance
modes and configurable 1:1 or 1+1 backup
enhancements. An on-chip synthesizer generates the
E1/T1/J1 clock rates by a single master clock input of
various frequencies. Two clock output references are
also offered. The device is offered in a 256-pin
TE-CSBGA, the smallest package available for a
16-channel LIU.
FEATURES
16 E1, T1, or J1 Short/Long-Haul Line
Interface Units
Independent E1, T1 or J1 Selections
Fully Internal Impedance Match Requires No
External Resistors
Software-Selectable Transmit and Receive-
Side Impedance Match
Crystal-Less Jitter Attenuator
Selectable Single-Rail and Dual-Rail Mode
and AMI or HDB3/B8ZS Line Encoding and
Decoding
Detection and Generation of AIS
Digital/Analog Loss of Signal Detection as
per T1.231, G.775 and ETS 300 233
External Master Clock Can Be Multiple of
2.048MHz or 1.544MHz for T1/J1 or E1
Operation; This Clock Will Be Internally
Adapted for T1 or E1 Usage
Receiver Signal Level Indicator from -2.5dB to
-38dB in T1 Mode and -3dB to -43dB in E1
Mode in 2.5dB Increments
Two Built-In BERT Testers for Diagnostics
8-Bit Parallel Interface Support for Intel or
Motorola Mode or a 4-Wire Serial Interface
Transmit Short-Circuit Protection
G.772 Nonintrusive Monitoring
Receive Monitor Mode Handles Combinations
of 14dB to 30dB of Resistive Attenuation
Along with 12dB to 30dB of Cable Attenuation
Specification Compliance to the Latest T1
and E1 Standards—ANSI T1.102, AT&T Pub
62411, T1.231, T1.403, ITU-T G.703, G.742,
G.775, G.823, ETS 300 166, and ETS 300 233
Single 3.3V Supply with 5V Tolerant I/O
JTAG Boundary Scan as Per IEEE 1149.1
APPLICATIONS
T1 Digital Cross-Connects
ATM and Frame Relay Equipment
Wireless Base Stations
ISDN Primary Rate Interface
E1/T1/J1 Multiplexer and Channel Banks
E1/T1/J1 LAN/WAN Routers
FUNCTIONAL DIAGRAM
JTAG
MODE
SOFTWARE CONTROL
AND JTAG
LOSS
RTIP
RRING
TTIP
TRING
RECEIVER
TRANSMITTER
1
RPOS
RNEG
RCLK
TPOS
TNEG
TCLK
16
ORDERING INFORMATION
PART
DS26334G
DS26334GN
TEMP RANGE
0°C to +70°C
-40°C to +85°C
PIN-PACKAGE
256 TE-CSBGA
256 TE-CSBGA
Note:
Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device
may be simultaneously available through various sales channels. For information about device errata, click here:
www.maxim-ic.com/errata.
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REV: 053107
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
TABLE OF CONTENTS
1
STANDARDS COMPLIANCE ...........................................................................................................6
1.1 T
ELECOM
S
PECIFICATIONS COMPLIANCE
..........................................................................................6
2
DETAILED DESCRIPTION ...............................................................................................................7
3
4
5
BLOCK DIAGRAMS .........................................................................................................................8
PIN DESCRIPTION .........................................................................................................................10
FUNCTIONAL DESCRIPTION........................................................................................................17
5.1 P
ORT
O
PERATION
.........................................................................................................................17
5.1.1
5.1.2
5.1.3
Serial Port Operation .......................................................................................................................... 17
Parallel Port Operation........................................................................................................................ 18
Interrupt Handling ............................................................................................................................... 18
5.2
5.3
5.4
P
OWER
-U
P AND
R
ESET
.................................................................................................................19
M
ASTER
C
LOCK
............................................................................................................................19
T
RANSMITTER
...............................................................................................................................20
Transmit Line Templates .................................................................................................................... 22
LIU Transmit Front-End ...................................................................................................................... 25
Transmit Dual-Rail Mode .................................................................................................................... 26
Transmit Single-Rail Mode.................................................................................................................. 26
Zero Suppression—B8ZS or HDB3 .................................................................................................... 26
Transmit Power-Down ........................................................................................................................ 26
Transmit All Ones................................................................................................................................ 27
Driver Fail Monitor............................................................................................................................... 27
Receiver Impedance Matching Calibration ......................................................................................... 27
Receiver Monitor Mode....................................................................................................................... 27
Peak Detector and Slicer .................................................................................................................... 28
Receive Level Indicator....................................................................................................................... 28
Clock and Data Recovery ................................................................................................................... 28
Loss of Signal...................................................................................................................................... 28
AIS ...................................................................................................................................................... 29
Receive Dual-Rail Mode ..................................................................................................................... 30
Receive Single-Rail Mode................................................................................................................... 30
Bipolar Violation and Excessive Zero Detector................................................................................... 30
5.4.1
5.4.2
5.4.3
5.4.4
5.4.5
5.4.6
5.4.7
5.4.8
5.5
R
ECEIVER
.....................................................................................................................................27
5.5.1
5.5.2
5.5.3
5.5.4
5.5.5
5.5.6
5.5.7
5.5.8
5.5.9
5.5.10
5.6
5.7
5.8
J
ITTER
A
TTENUATOR
.....................................................................................................................31
G.772 M
ONITOR
...........................................................................................................................32
L
OOPBACKS
..................................................................................................................................32
Analog Loopback ................................................................................................................................ 32
Digital Loopback.................................................................................................................................. 33
Remote Loopback............................................................................................................................... 33
General Description ............................................................................................................................ 34
Configuration and Monitoring.............................................................................................................. 35
Receive Pattern Detection .................................................................................................................. 36
Transmit Pattern Generation............................................................................................................... 38
5.8.1
5.8.2
5.8.3
5.9
BERT...........................................................................................................................................34
5.9.1
5.9.2
5.9.3
5.9.4
6
REGISTER MAPS AND DEFINITION.............................................................................................39
6.1 R
EGISTER
D
ESCRIPTION
...............................................................................................................48
6.1.1
6.1.2
6.1.3
6.1.4
Primary Register Bank ........................................................................................................................ 48
Secondary Register Bank ................................................................................................................... 63
Individual LIU Register Bank............................................................................................................... 66
BERT Registers .................................................................................................................................. 85
7
JTAG BOUNDARY SCAN ARCHITECTURE AND TEST ACCESS PORT ...................................92
7.1 TAP C
ONTROLLER
S
TATE
M
ACHINE
..............................................................................................93
7.1.1
7.1.2
Test-Logic-Reset................................................................................................................................. 93
Run-Test-Idle ...................................................................................................................................... 93
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DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
7.1.3
7.1.4
7.1.5
7.1.6
7.1.7
7.1.8
7.1.9
7.1.10
7.1.11
7.1.12
7.1.13
7.1.14
7.1.15
7.1.16
Select-DR-Scan .................................................................................................................................. 93
Capture-DR ......................................................................................................................................... 93
Shift-DR............................................................................................................................................... 93
Exit1-DR.............................................................................................................................................. 93
Pause-DR............................................................................................................................................ 93
Exit2-DR.............................................................................................................................................. 93
Update-DR .......................................................................................................................................... 93
Select-IR-Scan .................................................................................................................................... 94
Capture-IR........................................................................................................................................... 94
Shift-IR ................................................................................................................................................ 94
Exit1-IR ............................................................................................................................................... 94
Pause-IR ............................................................................................................................................. 94
Exit2-IR ............................................................................................................................................... 94
Update-IR............................................................................................................................................ 94
EXTEST .............................................................................................................................................. 96
HIGHZ ................................................................................................................................................. 96
CLAMP................................................................................................................................................ 96
SAMPLE/PRELOAD ........................................................................................................................... 96
IDCODE .............................................................................................................................................. 96
BYPASS.............................................................................................................................................. 96
Boundary Scan Register ..................................................................................................................... 97
Bypass Register .................................................................................................................................. 97
Identification Register ......................................................................................................................... 97
7.2
I
NSTRUCTION
R
EGISTER
................................................................................................................96
7.2.1
7.2.2
7.2.3
7.2.4
7.2.5
7.2.6
7.3
T
EST
R
EGISTERS
..........................................................................................................................97
7.3.1
7.3.2
7.3.3
DC ELECTRICAL CHARACTERIZATION......................................................................................98
8.1 DC P
IN
L
OGIC
L
EVELS
..................................................................................................................98
8.2 S
UPPLY
C
URRENT AND
O
UTPUT
V
OLTAGE
.....................................................................................98
9
AC TIMING CHARACTERISTICS...................................................................................................99
9.1 L
INE
I
NTERFACE
C
HARACTERISTICS
...............................................................................................99
9.2 P
ARALLEL
H
OST
I
NTERFACE
T
IMING
C
HARACTERISTICS
...............................................................100
9.3 S
ERIAL
P
ORT
..............................................................................................................................112
9.4 S
YSTEM
T
IMING
..........................................................................................................................113
9.5 JTAG T
IMING
..............................................................................................................................115
10 PIN CONFIGURATION .................................................................................................................116
11
PACKAGE INFORMATION ..........................................................................................................117
11.1 256-B
ALL
TE-CSBGA (17
MM X
17
MM
) (56-G6028-001) .............................................................117
12 THERMAL INFORMATION...........................................................................................................118
13
DATA SHEET REVISION HISTORY.............................................................................................120
8
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DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
LIST OF FIGURES
Figure 3-1. Block Diagram ........................................................................................................................................... 8
Figure 3-2. Receive Logic Detail.................................................................................................................................. 9
Figure 3-3. Transmit Logic Detail................................................................................................................................. 9
Figure 5-1. Serial Port Operation for Write Access ................................................................................................... 17
Figure 5-2. Serial Port Operation for Read Access with CLKE = 0 ........................................................................... 17
Figure 5-3. Serial Port Operation for Read Access with CLKE = 1 ........................................................................... 18
Figure 5-4. Interrupt Handling Flow Diagram ............................................................................................................ 19
Figure 5-5. Prescaler PLL and Clock Generator ....................................................................................................... 20
Figure 5-6. T1 Transmit Pulse Templates ................................................................................................................. 23
Figure 5-7. E1 Transmit Pulse Templates ................................................................................................................. 24
Figure 5-8. LIU Front-End.......................................................................................................................................... 25
Figure 5-9. Jitter Attenuation ..................................................................................................................................... 31
Figure 5-10. Analog Loopback................................................................................................................................... 32
Figure 5-11. Digital Loopback.................................................................................................................................... 33
Figure 5-12. Remote Loopback ................................................................................................................................. 33
Figure 5-13. PRBS Synchronization State Diagram.................................................................................................. 36
Figure 5-14. Repetitive Pattern Synchronization State Diagram............................................................................... 37
Figure 7-1. JTAG Functional Block Diagram ............................................................................................................. 92
Figure 7-2. TAP Controller State Diagram................................................................................................................. 95
Figure 9-1. Intel Nonmuxed Read Cycle ................................................................................................................. 101
Figure 9-2. Intel Mux Read Cycle ............................................................................................................................ 102
Figure 9-3. Intel Nonmux Write Cycle...................................................................................................................... 104
Figure 9-4. Intel Mux Write Cycle ............................................................................................................................ 105
Figure 9-5. Motorola Nonmux Read Cycle .............................................................................................................. 107
Figure 9-6. Motorola Mux Read Cycle ..................................................................................................................... 108
Figure 9-7. Motorola Nonmux Write Cycle .............................................................................................................. 110
Figure 9-8. Motorola Mux Write Cycle ..................................................................................................................... 111
Figure 9-9. Serial Bus Timing Write Operation........................................................................................................ 112
Figure 9-10. Serial Bus Timing Read Operation with CLKE = 0.............................................................................. 112
Figure 9-11. Serial Bus Timing Read Operation with CLKE = 1.............................................................................. 112
Figure 9-12. Transmitter Systems Timing ............................................................................................................... 113
Figure 9-13. Receiver Systems Timing ................................................................................................................... 114
Figure 9-14. JTAG Timing ....................................................................................................................................... 115
Figure 10-1. 256-Ball TE-CSBGA............................................................................................................................ 116
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DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
LIST OF TABLES
Table 4-1. Pin Descriptions........................................................................................................................................ 10
Table 5-1. Parallel Port Mode Selection and Pin Functions ...................................................................................... 18
Table 5-2. Telecommunications Specification Compliance for DS26334 Transmitters ............................................ 21
Table 5-3. Registers Related to Control of DS26334 Transmitters ........................................................................... 21
Table 5-4. Template Selections for Short-Haul Mode ............................................................................................... 22
Table 5-5. Template Selections for Long-Haul Mode ................................................................................................ 22
Table 5-6. LIU Front-End Values ............................................................................................................................... 26
Table 5-7. Loss Criteria ANSI T1.231, ITU-T G.775, and ETS 300 233 Specifications ............................................ 28
Table 5-8. AIS Criteria ANSI T1.231, ITU-T G.775, and ETS 300 233 Specifications.............................................. 29
Table 5-9. AIS Detection and Reset Criteria for DS26334 ........................................................................................ 29
Table 5-10. Registers Related to AIS Detection........................................................................................................ 30
Table 5-11. BPV, Code Violation, and Excessive Zero Error Reporting ................................................................... 30
Table 5-12. Pseudorandom Pattern Generation........................................................................................................ 35
Table 5-13. Repetitive Pattern Generation ................................................................................................................ 35
Table 6-1. Primary Register Set ................................................................................................................................ 40
Table 6-2. Secondary Register Set............................................................................................................................ 41
Table 6-3. Individual LIU Register Set....................................................................................................................... 42
Table 6-4. BERT Register Set ................................................................................................................................... 43
Table 6-5. Primary Register Set Bit Map ................................................................................................................... 44
Table 6-6. Secondary Register Set Bit Map .............................................................................................................. 45
Table 6-7. Individual LIU Register Set Bit Map.......................................................................................................... 46
Table 6-8. BERT Register Bit Map ............................................................................................................................ 47
Table 6-9. G.772 Monitoring Control (LIU 1) ............................................................................................................. 54
Table 6-10. G.772 Monitoring Control (LIU 9) ........................................................................................................... 54
Table 6-11. TST Template Select Transmitter Register (LIUs 1–8) .......................................................................... 59
Table 6-12. TST Template Select Transmitter Register (LIUs 9–16) ........................................................................ 59
Table 6-13. Template Selection................................................................................................................................. 60
Table 6-14. Address Pointer Bank Selection............................................................................................................. 63
Table 6-15. DS26334 MCLK Selections.................................................................................................................... 69
Table 6-16. Receiver Sensitivity/Monitor Mode Gain Selection ................................................................................ 75
Table 6-17. Receiver Signal Level............................................................................................................................. 76
Table 6-18. Bit Error Rate Transceiver Select for Channels 1–8 .............................................................................. 80
Table 6-19. Bit Error Rate Transceiver Select for Channels 9–16 ............................................................................ 80
Table 6-20. PLL Clock Select .................................................................................................................................... 83
Table 6-21. Clock A Select ........................................................................................................................................ 83
Table 7-1. Instruction Codes for IEEE 1149.1 Architecture....................................................................................... 96
Table 7-2. ID Code Structure..................................................................................................................................... 97
Table 7-3. Device ID Codes....................................................................................................................................... 97
Table 8-1. Recommended DC Operating Conditions ................................................................................................ 98
Table 8-2. Pin Capacitance ....................................................................................................................................... 98
Table 8-3. DC Characteristics.................................................................................................................................... 98
Table 9-1. Transmitter Characteristics....................................................................................................................... 99
Table 9-2. Receiver Characteristics........................................................................................................................... 99
Table 9-3. Intel Read Mode Characteristics ............................................................................................................ 100
Table 9-4. Intel Write Cycle Characteristics ............................................................................................................ 103
Table 9-5. Motorola Read Cycle Characteristics ..................................................................................................... 106
Table 9-6. Motorola Write Cycle Characteristics ..................................................................................................... 109
Table 9-7. Serial Port Timing Characteristics .......................................................................................................... 112
Table 9-8. Transmitter System Timing..................................................................................................................... 113
Table 9-9. Receiver System Timing......................................................................................................................... 114
Table 9-10. JTAG Timing Characteristics................................................................................................................ 115
Table 12-1. Thermal Characteristics........................................................................................................................ 118
Table 12-2. Package Power Dissipation (for Thermal Considerations)................................................................... 118
Table 12-3. Per-Channel Power-Down Savings (for Thermal Considerations)....................................................... 119
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