1
Precision EdgeTM
SY89208V
Micrel
DESCRIPTION
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
(pk-pk)
deterministic jitter
<10ps
(pk-pk)
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 MLFTM
(2mm x 2mm)
package
FEATURES
3.3V/5V 3GHz PECL/ECL
2:1 MULTIPLEXER
Precision EdgeTM
SY89208V
APPLICATIONS
s
SONET
s
Gig Ethernet
s
Fibre Channel
s
Transponders
Rev.: A
Amendment: /0
Issue Date:
June 2003
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 MLFTM 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
EdgeTM 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.
FUNCTIONAL BLOCK DIAGRAM
Precision EdgeTM
Precision Edge is a trademark of Micrel, Inc.
Micro
LeadFrame and MLF are trademarks of Amkor Technology, Inc.
TIME (50ps/div.)
Output Swing
(60mV/div
.
)
2.7Gbps, 2
23
1PRBS
TYPICAL PERFORMANCE
Single-Ended PECL Da
Single-Ended PECL Db
SEL
(PECL/ECL)
Q
/Q
1
0
2
Precision EdgeTM
SY89208V
Micrel
PACKAGE/ORDERING INFORMATION
Ordering Information
Package
Operating
Package
Part Number
Type
Range
Marking
SY89208VMITR*
MLF-8
Industrial
208
*Tape and Reel
PIN DESCRIPTION
NC
DA
DB
SEL
VCC
Q
/Q
VEE
1
2
3
4
8
7
6
5
8-Pin MLFTM
Ultra-Small Outline (2mm x 2mm)
Pin Number
Pin Name
Type
Pin Function
2, 3
DA, DB
100k
Single-ended PECL/ECL Inputs: The signal inputs include internal 75k
ECL Input
pull-down resistors. Default condition is LOW when left floating. The input
signal should be terminated externally.
4
SEL
100k
Single-ended PECL/ECL Input: PECL/ECL compatible 2:1 mux select. See
ECL Input
Truth Table. Includes internal 75k
pull-down resistor. Default condition is
LOW when left floating.
5
VEE
Negative Power
Negative Power Supply: VEE and Exposed pad must be tied to most
Exposed Pad
Supply
negative supply. For PECL/LVPECL connect to ground.
6, 7
/Q, Q
100k ECL Output
Differential PECL/LVPECL Output: 100k ECL/ output defaults to LOW if D
inputs left open. See
"Output Interface Applications"
section for
recommendations on terminations.
8
VCC
Power
Positive Power Supply: Bypass with 0.1
F//0.01
F low ESR capacitors.
1
NC
Not connected.
MUX SELECT TRUTH TABLE
SEL
DATA OUT (Q, /Q)
L
DB Input Selected
H
DA Input Selected
3
Precision EdgeTM
SY89208V
Micrel
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
MLFTM (
JA
)
Still-Air ................................................................. 93
C/W
500lfpm ............................................................... 87
C/W
MLFTM (
JB
),
Junction-to-Board ................................................ 60
C/W
Symbol
Parameter
Condition
Min
Typ
Max
Units
V
CC
Power Supply Voltage
(PECL)
4.5
5.0
5.5
V
(LVPECL)
3.0
--
3.6
V
(ECL)
5.5
5.0
4.5
V
(LVECL)
3.6
3.3
3.0
V
I
EE
Supply Current
No load
--
35
50
mA
I
IH
Input HIGH Current
V
IN
= V
IH
--
--
80
A
I
IL
Input LOW Current
All Inputs
V
IN
= V
IL
0.5
--
--
A
C
IN
Input Capacitance
--
1.0
--
pF
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
Parameter
Condition
Min
Typ
Max
Units
V
OH
Output HIGH Voltage
Note 5
V
CC
1.145
--
V
CC
0.895
V
V
OL
Output LOW Voltage
Note 5
V
CC
1.945
--
V
CC
1.695
V
V
IH
Input HIGH Voltage
V
CC
1.225
--
V
CC
0.88
V
V
IL
Input LOW Voltage
V
CC
1.945
--
V
CC
1.625
V
V
IHCMR
Input HIGH Voltage
Note 6
V
EE
+2.0
--
V
CC
V
Common Mode Range
V
BB
Bias Voltage
V
CC
1.525 V
CC
1.425 V
CC
1.325
V
PECL/ECL (100K) DC ELECTRICAL CHARACTERISTICS
(Note 4)
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
4
Precision EdgeTM
SY89208V
Micrel
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
Parameter
Condition
Min
Typ
Max
Units
f
MAX
Max. Toggle Frequency
Note 7
3
--
--
GHz
t
pd
Propagation Delay (Differential)
SEL to Q, /Q; D to Q, /Q
170
230
420
ps
t
SKEW
Part-to-Part Skew
Note 8
--
--
200
ps
t
JITTER
Cycle-to-Cycle Jitter (rms)
Note 9
--
--
1
ps
(rms)
Random Jitter
Note 10
--
--
1
ps
(rms)
Deterministic Jitter
@1.25Gbps
Note 11
--
7
--
ps
(pk-pk)
@2.5Gbps
Note 10
--
10
--
ps
(pk-pk)
Total Jitter
Note 12
--
--
10
ps
(pk-pk)
V
IN
Differential Input Voltage Range
150
800
1200
mV
t
r,
t
f
Output Rise/Fall Time
Q, /Q
90
140
200
ps
(20% to 80%)
Note 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
RATlNG conditions for extended periods may affect device reliability.
Note 2.
The data sheet limits are not guaranteed if the device is operated beyond the operating ratings.
Note 3.
Package Thermal Resistance assumes exposed pad is soldered (or equivalent) to the devices most negative potential on the PCB.
Note 4.
The device is guaranteed to meet the DC specifications, shown in the table above, after thermal equilibrium has been established.
Note 5.
Output loaded with 50
to V
CC
2V.
Note 6.
V
IHCMR
(min) varies 1:1 with V
EE
, (max) varies 1:1 with V
CC
.
Note 7.
Measured with 750mV input signal, 50% duty cycle. Output swing
400mV. All loading with a 50
to V
CC
2.0V.
Note 8.
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.
AC ELECTRICAL CHARACTERISTICS
5
Precision EdgeTM
SY89208V
Micrel
TYPICAL OPERATING CHARACTERISTICS
V
CC
= 3.3V, V
EE
= GND, T
A
= 25
C, unless otherwise stated.
500MHz Output
TIME (300ps/div.)
Output Swing
(200mV/div
.)
V
IN
= 800mV
/Q
Q
1.5GHz Output
TIME (100ps/div.)
Output Swing
(200mV/div
.)
V
IN
= 800mV
/Q
Q
2.5GHz Output
TIME (60ps/div.)
Output Swing
(200mV/div
.)
V
IN
= 800mV
/Q
Q
3.0GHz Output
TIME (55ps/div.)
Output Swing
(200mV/div
.)
V
IN
= 800mV
/Q
Q
400
500
600
700
800
900
1000
100 600 1100 1600 2100 2600 3100
OUTPUT AMPLITUDE (mV)
FREQUENCY (MHz)
Output Amplitude
vs. Frequency
V
IN
= 800mV
200
210
220
230
240
250
260
270
280
290
300
-40 -20
0
20
40
60
80 100
PROPAGATION DELAY (ps)
TEMPERATURE (
C)
Propagation Delay
vs. Temperature
V
IN
= 800mV
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