Micrel, Inc.
3.3V/5V 3GHz PECL/ECL
2:1 MULTIPLEXER
Precision Edge
®
SY89208V
Precision Edge
®
SY89208V
FEATURES
s
2:1 PECL/ECL multiplexer
s
Guaranteed AC-performance over temperature/
voltage
• >3GHz f
MAX
(toggle)
• <200ps rise/fall time
• <420ps propagation delay (D-to-Q)
s
Low jitter performance
• <1ps
RMS
random jitter
• <15ps
PP
deterministic jitter
• <10ps
PP
total jitter (clock)
s
Flexible supply voltage: 3V to 5.5V
100k ECL/PECL compatible output
s
Wide operating temperature range: –40
°
C to +85
°
C
s
Available in ultra-small 8-pin MLF™ (2mm x 2mm)
package
Precision Edge
®
DESCRIPTION
The SY89208V is a 3.3V/5V precision high-speed 2:1
multiplexer. It is functionally equivalent to the SY100EP58V
but in an ultra-small 8-lead MLF™ package that features a
70% smaller footprint. The signal-path inputs (Da and Db)
are single-ended PECL/ECL compatible, and can accept a
signal swing as low as 150mV. All I/O pins are 10k/100k EP
ECL/PECL compatible.
AC-performance is guaranteed over the industrial –40°C
to +85°C temperature range and 3.0V to 5.5V supply voltage
range. Maximum throughput (f
MAX
) is guaranteed to be 3GHz
with a differential output swing
≥400mV.
In addition, these
multiplexers are optimized for low-jitter applications. The
SY89208V is designed to operate in either ECL/PECL or
PECL/LVPECL mode. The SY89208V is internally
temperature compensated, thus is 100k EP ECL/PECL
compatible—I/O logic levels remain constant over
temperature.
The SY89208V is part of Micrel’s high-speed, Precision
Edge™ timing and distribution family. For applications that
require a differential I/O combination, consult the Micrel
website at: www.micrel.com, and choose from a
comprehensive product line of high-speed, low skew fanout
buffers, translators, and clock dividers.
APPLICATIONS
s
s
s
s
SONET
Gig Ethernet
Fibre Channel
Transponders
FUNCTIONAL BLOCK DIAGRAM
TYPICAL PERFORMANCE
Single-Ended PECL Da
Single-Ended PECL Db
1
0
Q
/Q
SEL
(PECL/ECL)
Output Swing
(60mV/div.)
TIME (50ps/div.)
2.7Gbps, 2
23
– 1PRBS
Precision Edge is a registered trademark of Micrel, Inc.
MicroLeadFrame
and MLF are trademarks of Amkor Technology, Inc.
M9999-051805
hbwhelp@micrel.com or (408) 955-1690
Rev.: B
Amendment: /0
1
Issue Date: May 2005
Micrel, Inc.
Precision Edge
®
SY89208V
PACKAGE/ORDERING INFORMATION
Ordering Information
(1)
NC
DA
DB
SEL
1
2
3
4
8
7
6
5
VCC
Q
/Q
VEE
Part Number
SY89208VMITR
(2)
SY89208VMGTR
(2)
Package
Type
MLF-8
MLF-8
Operating
Range
Industrial
Industrial
Package
Marking
208
208 with
Pb-Free bar-line indicator
Lead
Finish
Sn-Pb
Pb-Free
NiPdAu
8-Pin MLF™
Ultra-Small Outline (2mm x 2mm)
Notes:
1. Contact factory for die availability. Dice are guaranteed at T
A
= 25°C, DC electricals only.
2. Tape and Reel.
PIN DESCRIPTION
Pin Number
2, 3
Pin Name
DA, DB
Type
100k
ECL Input
100k
ECL Input
Negative Power
Supply
100k ECL Output
Pin Function
Single-ended PECL/ECL Inputs: The signal inputs include internal 75kΩ
pull-down resistors. Default condition is LOW when left floating. The input
signal should be terminated externally.
Single-ended PECL/ECL Input: PECL/ECL compatible 2:1 mux select. See
Truth Table. Includes internal 75kΩ pull-down resistor. Default condition is
LOW when left floating.
Negative Power Supply: VEE and Exposed pad must be tied to most
negative supply. For PECL/LVPECL connect to ground.
Differential PECL/LVPECL Output: 100k ECL/ output defaults to LOW if D
inputs left open. See
“Output Interface Applications”
section for
recommendations on terminations.
Positive Power Supply: Bypass with 0.1µF//0.01µF low ESR capacitors.
Not connected.
4
SEL
5
6, 7
VEE
Exposed Pad
/Q, Q
8
1
VCC
NC
Power
MUX SELECT TRUTH TABLE
SEL
L
H
DATA OUT (Q, /Q)
DB Input Selected
DA Input Selected
M9999-051805
hbwhelp@micrel.com or (408) 955-1690
2
Micrel, Inc.
Precision Edge
®
SY89208V
Absolute Maximum Ratings
(Note 1)
Supply Voltage (V
CC
) ................................. –0.5V to + 6.0V
Input Voltage (V
IN
) ......................................... –0.5V to V
CC
LVPECL Output Current (I
OUT
)
Continuous ............................................................. 50mA
Surge .................................................................... 100mA
Input Current
Source or sink current on D, /D ............................
±50mA
Lead Temperature (soldering, 10 sec.) ................... +220°C
Storage Temperature (T
S
) ....................... –65°C to +150°C
Operating Ratings
(Note 2)
Supply Voltage (|V
CC
–V
EE
|) .. LVPECL/LVECL 3.0V to 3.6V
.............................................. PECL/ECL 4.5V to 5.5V
Ambient Temperature (T
A
) ......................... –40°C to +85°C
Package Thermal Resistance
Note 3
MLF™ (θ
JA
)
Still-Air ................................................................. 93°C/W
500lfpm ............................................................... 87°C/W
MLF™ (Ψ
JB
),
Junction-to-Board ................................................ 60°C/W
DC ELECTRICAL CHARACTERISTICS
(Note 4)
Symbol
V
CC
Parameter
Power Supply Voltage
(PECL)
(LVPECL)
(ECL)
(LVECL)
No load
V
IN
= V
IH
All Inputs
V
IN
= V
IL
Condition
Min
4.5
3.0
–5.5
–3.6
—
—
0.5
—
Typ
5.0
—
–5.0
–3.3
35
—
—
1.0
Max
5.5
3.6
–4.5
–3.0
50
80
—
—
Units
V
V
V
V
mA
µA
µA
pF
I
EE
I
IH
I
IL
C
IN
Supply Current
Input HIGH Current
Input LOW Current
Input Capacitance
PECL/ECL (100K) DC ELECTRICAL CHARACTERISTICS
(Note 4)
V
CC
= +3.3V±10% or +5V±10% and V
EE
= 0V; V
CC
= 0V and V
EE
= –3.3V±10% or –5V±10%; T
A
= –40°C to +85°C unless otherwise noted.
Symbol
V
OH
V
OL
V
IH
V
IL
V
IHCMR
V
BB
Parameter
Output HIGH Voltage
Output LOW Voltage
Input HIGH Voltage
Input LOW Voltage
Input HIGH Voltage
Common Mode Range
Bias Voltage
Note 6
Condition
Note 5
Note 5
Min
V
CC
–1.145
V
CC
–1.945
V
CC
–1.225
V
CC
–1.945
V
EE
+2.0
Typ
—
—
—
—
—
Max
V
CC
–0.895
V
CC
–1.695
V
CC
–0.88
V
CC
–1.625
V
CC
Units
V
V
V
V
V
V
V
CC
–1.525 V
CC
–1.425 V
CC
–1.325
M9999-051805
hbwhelp@micrel.com or (408) 955-1690
3
Micrel, Inc.
Precision Edge
®
SY89208V
AC ELECTRICAL CHARACTERISTICS
V
CC
= +3.3V±10% or +5V±10% and V
EE
= 0V; V
CC
= 0V and V
EE
= –3.3V±10% or –5V±10%; T
A
= –40°C to +85°C unless otherwise noted.
Symbol
f
MAX
t
pd
t
SKEW
t
JITTER
Parameter
Max. Toggle Frequency
Propagation Delay (Differential)
SEL to Q, /Q; D to Q, /Q
Part-to-Part Skew
Cycle-to-Cycle Jitter (rms)
Random Jitter
Deterministic Jitter
@1.25Gbps
@2.5Gbps
Total Jitter
V
IN
t
r,
t
f
Note 1.
Condition
Note 7
Min
3
170
Typ
—
230
—
—
—
7
10
—
800
140
Max
—
420
200
1
1
—
—
10
1200
200
Units
GHz
ps
ps
ps
RMS
ps
RMS
ps
PP
ps
PP
ps
PP
mV
ps
Note 8
Note 9
Note 10
Note 11
Note 10
Note 12
—
—
—
—
—
—
150
90
Differential Input Voltage Range
Output Rise/Fall Time
(20% to 80%)
Q, /Q
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
RATlNG conditions for extended periods may affect device reliability.
The data sheet limits are not guaranteed if the device is operated beyond the operating ratings.
Package Thermal Resistance assumes exposed pad is soldered (or equivalent) to the devices most negative potential on the PCB.
The device is guaranteed to meet the DC specifications, shown in the table above, after thermal equilibrium has been established.
Output loaded with 50Ω to V
CC
–2V.
Note 2.
Note 3.
Note 4.
Note 5.
Note 6.
Note 7.
Note 8.
V
IHCMR
(min) varies 1:1 with V
EE
, (max) varies 1:1 with V
CC
.
Measured with 750mV input signal, 50% duty cycle. Output swing
≥
400mV. All loading with a 50Ω to V
CC
–2.0V.
Skew is measured between outputs under identical transitions. Duty cycle skew is defined only for differential operation when the delays are
measured from the cross point of the inputs to the cross point of the outputs.
Note 9.
The variation in period between adjacent cycles over a random sample of adjacent cycle pairs. t
JITTER_CC
= t
n
– t
n
+ 1, where t is the time between
rising edges of the output signal.
Note 10.
Random jitter is measured with a K28.7 comma detect character pattern, measured at 1.25Gbps and 2.5Gbps.
Note 11.
Deterministic jitter is measured at 1.25Gbps and 2.5Gbps, with both K28.5 and 2
23
–1 PRBS pattern.
Note 12.
Total Jitter definition with an ideal clock input, no more than 1 output edge in 10
12
output edges will deviate by more than specified peak-to-peak
jitter value.
M9999-051805
hbwhelp@micrel.com or (408) 955-1690
4
Micrel, Inc.
Precision Edge
®
SY89208V
TYPICAL OPERATING CHARACTERISTICS
V
CC
= 3.3V, V
EE
= GND, T
A
= 25°C, unless otherwise stated.
1000
OUTPUT AMPLITUDE (mV)
Output Amplitude
vs. Frequency
300
PROPAGATION DELAY (ps)
Propagation Delay
vs. Temperature
290
280
270
260
250
240
230
220
210
200
-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
V
IN
= 800mV
900
800
700
600
500
400
100 600 1100 1600 2100 2600 3100
FREQUENCY (MHz)
V
IN
= 800mV
500MHz Output
V
IN
= 800mV
V
IN
= 800mV
1.5GHz Output
Output Swing
(200mV/div.)
Output Swing
(200mV/div.)
/Q
/Q
Q
Q
TIME (300ps/div.)
TIME (100ps/div.)
2.5GHz Output
V
IN
= 800mV
V
IN
= 800mV
3.0GHz Output
Output Swing
(200mV/div.)
/Q
Output Swing
(200mV/div.)
TIME (60ps/div.)
/Q
Q
Q
TIME (55ps/div.)
M9999-051805
hbwhelp@micrel.com or (408) 955-1690
5
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