Micrel, Inc.
2.5V/3.3V 1.5GHz PRECISION
LVPECL PROGRAMMABLE DELAY
WITH FINE TUNE CONTROL
Precision Edge
®
SY89296U
Precision Edge
®
SY89296U
FEATURES
■
Precision LVPECL programmable delay line
■
Guaranteed AC performance over temperature and
voltage:
•
> 1.5GHz f
MAX
•
< 160ps rise/fall times
■
Low jitter design:
•
< 10ps
PP
total jitter
•
< 2ps
RMS
cycle-to-cycle jitter
•
< 1ps
RMS
random jitter
■
Programmable delay range: 3.2ns to 14.8ns in 10ps
increments
■
Increased monotonicity over the MC100EP195
■
±
10% of LSB INL
■
V
BB
output reference voltage
■
Parallel inputs accepts LVPECL or CMOS/LVTTL
■
■
■
■
40ps/V fine tuning range
Low voltage operation: 2.5V
±
5% and 3.3V
±
10%
Industrial –40
°
C to +85
°
C temperature range
Available in 32-pin (5mm
×
5mm) MLF
®
package or
32-pin TQFP package
Precision Edge
®
DESCRIPTION
The SY89296U is a programmable delay line that delays
the input signal using a digital control signal. The delay can
vary from 3.2ns to 14.8ns in 10ps increments. Further, the
delay may be varied continuously in about 40ps range by
setting the voltage at the FTUNE pin. In addition, the input
signal is LVPECL, uses either a 2.5V
±5%
or 3.3V
±10%
power supply, and is guaranteed over the full industrial
temperature range (–40°C to +85°C).
The delay varies in discrete steps based on a control
word. The control word is 10-bits long and controls the
delay in 10ps increments. The eleventh bit is D[10] and is
used to simultaneously cascade the SY89296U for a larger
delay range. In addition, the input pins IN and
/IN default to an equivalent low state when left floating.
Further, for maximum flexibility, the control register interface
accepts CMOS or TTL level signals.
For applications that do not require an analog delay input,
see the SY89295U. The SY89295U and SY89296U are
part of Micrel’s high-speed, Precision Edge
®
product line.
All support documentation can be found on Micrel’s
website at www.micrel.com.
APPLICATIONS
■
Clock de-skewing
■
Timing adjustments
■
Aperture centering
Precision Edge is a registered trademark of Micrel, Inc.
Micro
LeadFrame and MLF are registered trademarks of Amkor Technology, Inc.
M9999-072706
hbwhelp@micrel.com or (408) 955-1690
Rev.: D
Amendment: /0
1
Issue Date: July 2006
Micrel, Inc.
Precision Edge
®
SY89296U
PACKAGE/ORDERING INFORMATION
D7
D6
D5
D4
GND
D3
D2
D1
Ordering Information
(1)
GND
D0
VCC
Q
/Q
VCC
VCC
FTUNE
32 31 30 29 28 27 26 25
D8
D9
D10
IN
/IN
VBB
VEF
VCF
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16
24
23
22
21
20
19
18
17
Part Number
SY89296UMI
SY89296UMITR
(2)
SY89296UTI
SY89296UTITR
(2)
SY89296UMG
(3)
Package
Type
MLF-32
MLF-32
T32-1
T32-1
MLF-32
Operating
Range
Industrial
Industrial
Industrial
Industrial
Industrial
Industrial
Industrial
Industrial
Package
Marking
SY89296U
SY89296U
SY89296U
SY89296U
SY89296U with
Pb-Free bar-line indicator
SY89296U with
Pb-Free bar-line indicator
SY89296U with
Pb-Free bar-line indicator
SY89296U with
Pb-Free bar-line indicator
Lead
Finish
Sn-Pb
Sn-Pb
Sn-Pb
Sn-Pb
Pb-Free
NiPdAu
Pb-Free
NiPdAu
Pb-Free
NiPdAu
Pb-Free
NiPdAu
GND
LEN
SETMIN
SETMAX
VCC
/CASCADE
CASCADE
/EN
SY89296UMGTR
(2, 3)
MLF-32
SY89296UTG
(3)
SY89296UTGTR
(2, 3)
T32-1
T32-1
32-Pin MLF™ (MLF-32)
D7
D6
D5
D4
GND
D3
D2
D1
32 31 30 29 28 27 26 25
D8
D9
D10
IN
/IN
VBB
VEF
VCF
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16
24
23
22
21
20
19
18
17
GND
D0
VCC
Q
/Q
VCC
VCC
FTUNE
Notes:
1. Contact factory for die availability. Dice are guaranteed at T
A
= 25°C, DC electricals only.
2. Tape and Reel.
3. Pb-Free package recommended for new designs.
32-Pin TQFP (T32-1)
TRUTH TABLES
Input/Output
Inputs
IN
0
1
/IN
1
0
OUT
0
1
Outputs
/OUT
1
0
Digital Control Latch
LEN
0
1
Latch Action
Pass Through D[10:0]
Latched D[10:0]
Input Enable
/EN
0
1
Q, /Q
IN, /IN Delayed
Latched D[10:0]
M9999-072706
hbwhelp@micrel.com or (408) 955-1690
GND
LEN
SETMIN
SETMAX
VCC
/CASCADE
CASCADE
/EN
2
Micrel, Inc.
Precision Edge
®
SY89296U
FUNCTIONAL BLOCK DIAGRAM
IN
/IN
/EN
512
GD
0
1
0
1
0
1
0
1
0
1
256
GD
128
GD
64
GD
32
GD
0
1
0
1
0
1
0
1
0
1
16
GD
8
GD
4
GD
2
GD
1
GD
FTUNE
D[9:0]
LEN
SETMIN
SETMAX
1
GD
10-bit
Latch
0
1
Q
/Q
D[10]
Latch
CASCADE
/CASCADE
V
BB
V
CF
V
EF
M9999-072706
hbwhelp@micrel.com or (408) 955-1690
3
Micrel, Inc.
Precision Edge
®
SY89296U
PIN DESCRIPTION
Pin Number
23, 25, 26, 27, 29,
30, 31, 32, 1, 2
Pin Name
D[9:0]
Pin Function
CMOS, ECL, or TTL Control Bits: These control signals adjust the delay from IN to Q.
See “AC Electrical Characteristics” for delay values. In addition, see “Interface Applications”
section which illustrates the proper interfacing techniques for different logic standards.
D[9:0] contains pull-downs and defaults LOW when left floating. D0 (LSB), and D9 (MSB).
See “Typical Operating Characteristics” for delay information.
CMOS, ECL, or TTL Control Bit: This bit is used to cascade devices for an extended delay
range. In addition, it drives CASCADE and /CASCADE. Further, D[10] contains a pull-
down and defaults LOW when left floating.
LVPECL/ECL Signal Input: Input signal to be delayed. IN contains a 75kΩ pull-down and
will default to a logic LOW if left floating.
Reference Voltage Output: When using a single-ended input signal source to IN or /IN,
connect the unused input of the differential pair to this pin. This pin can also be used to
rebias AC-coupled inputs to IN and /IN. When used, de-couple to V
CC
using a 0.01µF
capacitor, otherwise leave floating if not used. Maximum sink/source is
±0.5mA.
Reference Voltage Output: Connect this pin to V
CF
when D[9:0], and D[10] is ECL.
Logic Standard
LVPECL
CMOS
TTL
8
9, 24, 28
VCF
GND,
Exposed Pad
(2)
LEN
SETMIN
V
CF
Connects to
V
EF
(1)
No Connect
1.5V Source
3
D10
4, 5
6
IN, /IN
VBB
(1)
7
VEF
Reference Voltage Input: The voltage driven on V
CF
sets the logic transition threshold for
D[9:0], and D[10].
Negative Supply: For MLF™ package, exposed pad must be connected to a ground plane
that is the same potential as the ground pin.
ECL Control Input: When HIGH latches the D[9:0] and D[10] bits. When LOW, the D[9:0]
and D[10] latches are transparent.
ECL Control Input: When HIGH, D[9:0] registers are reset. When LOW, the delay is set
by SETMAX or D[9:0] and D[10]. SETMIN contains a pull-down and defaults LOW when
left floating.
ECL Control Input: When SETMAX is set HIGH and SETMIN is set LOW, D[9:0] =
1111111111. When SETMAX is LOW, the delay is set by SETMIN or D[9:0] and
D[10]. SETMAX contains a pull-down and defaults LOW when left floating.
Positive Power Supply: Bypass with 0.1µF and 0.01µF low ESR capacitors.
LVPECL Differential Output: The outputs are used when cascading two or more
SY89296U to extend the delay range.
LVPECL Single-Ended Control Input: When LOW, Q is delayed from IN. When HIGH,
Q is a differential LOW. /EN contains a pull-down and defaults LOW when left floating.
LVPECL Differential Output: Q is a delayed version of IN. Always terminate the
output with 50Ω to V
CC
– 2V. See “Output Interface Applications” section.
Voltage Control Input: By varying the voltage, the delay is fine tuned, see the graph,
“Propagation Delay vs. FTUNE Voltage.” Leave pin floating if not used.
10
11
12
SETMAX
13, 18, 19, 22
14, 15
16
20, 21
17
Notes:
VCC
/Cascade,
Cascade
/EN
/Q, Q
FTUNE
1. Single-ended operation is only functional at 3.3V.
2. MLF™ package only.
M9999-072706
hbwhelp@micrel.com or (408) 955-1690
4
Micrel, Inc.
Precision Edge
®
SY89296U
Absolute Maximum Ratings
(1)
Supply Voltage (V
CC
) .................................. –0.5V to +4.0V
Input Voltage (V
IN
) ......................................... –0.5V to V
CC
LVPECL Output Current (I
OUT
)
Continuous ......................................................... 50mA
Surge ................................................................ 100mA
Lead Temperature (soldering, 20 sec.) ................... +260°C
Storage Temperature Range (T
S
) ............ –65°C to +150°C
Operating Ratings
(2)
Supply Voltage (V
CC
) .............................. +2.375V to +3.6V
Ambient Temperature (T
A
) ......................... –40°C to +85°C
Package Thermal Resistance
(3)
MLF™
(θ
JA
)
Still-Air ............................................................. 35°C/W
MLF™
(ψ
JB
)
Junction-to-Board ............................................ 28°C/W
TQFP
(θ
JA
)
Still-Air ............................................................. 28°C/W
TQFP
(ψ
JB
)
Junction-to-Board ............................................ 20°C/W
DC ELECTRICAL CHARACTERISTICS
(4)
T
A
= –40°C to 85°C, unless otherwise stated.
Symbol
V
CC
I
EE
V
IN
V
DIFF_IN
V
IHCMR
Parameter
Power Supply
Power Supply Current
Input Voltage Swing (IN, /IN)
Differential Input Voltage
Swing (IN, /IN)
Input High Common Mode Range
Condition
V
CC
= 2.5V
V
CC
= 3.3V
No load, max V
CC
See Figure 1a.
See Figure 1b.
IN, /IN
150
300
V
EE
+1.2
Min
2.375
3
Typ
2.5
3.3
Max
2.625
3.6
220
1200
2400
V
CC
Units
V
V
mA
mV
mV
V
V
CC
= 3.3V, T
A
= –40°C to 85°C, unless otherwise stated.
Symbol
V
IH
V
IL
V
BB
V
EF
V
CF
Parameter
Input High Voltage (IN, /IN)
Input Low High Voltage (IN, /IN)
Output Voltage Reference
Mode Connection
Input Select Voltage
Condition
Min
2.075
1.355
1.775
1.9
1.55
1.875
2.0
1.65
Typ
Max
2.420
1.675
1.975
2.1
1.75
Units
V
V
V
V
V
V
CC
= 2.5V, T
A
= –40°C to 85°C, unless otherwise stated.
Symbol
V
IH
V
IL
V
BB
V
EF
V
CF
Notes:
1. Permanent device damage may occur if “Absolute Maximum Ratings” are exceeded. This is a stress rating only and functional operation is not
implied at conditions other than those detailed in the operational sections of this data sheet. Exposure to “Absolute Maximum Rating” conditions
for extended periods may affect device reliability.
2. The data sheet limits are not guaranteed if the device is operated beyond the operating ratings.
3. Thermal performance on MLF™ packages assumes exposed pad is soldered (or equivalent) to the device most negative potential (GND).
4. The circuit is designed to meet the DC specifications shown in the table above after thermal equilibrium has been established. Input and output
parameters vary 1:1 with V
CC
, wtih the exception of V
CF
.
M9999-072706
hbwhelp@micrel.com or (408) 955-1690
Parameter
Input High Voltage (IN, /IN)
Input Low High Voltage (IN, /IN)
Output Voltage Reference
Mode Connection
Input Select Voltage
Condition
Min
1.275
0.555
0.925
1.10
1.15
Typ
Max
1.62
0.875
Units
V
V
V
V
V
1.075
1.20
1.25
1.175
1.30
1.35
5
Power technology
京公网安备 11010802033920号
EEWORLD
