1
ECL Pro™
SY100EP56V
Micrel, Inc.
M9999-120505
hbwhelp@micrel.com or (408) 955-1690
DESCRIPTION
FEATURES
3.3V/5V PECL/ECL 3GHz
DUAL DIFFERENTIAL
2:1 MULTIPLEXER
ECL Pro™
SY100EP56V
■Dual, fully differential 2:1 PECL/ECL multiplexer
■Guaranteed AC parameters over temperature/
voltage:
• > 3GHz fMAX (toggle)
• < 100ps within device skew
• < 230ps rise/fall times
• < 500ps propagation delay
■Flexible power supply: 3.0V to 5.5V
■Wide operating temperature range: –40°C to +85°C
■VBB reference for AC-coupled and single-ended
applications
■Both channels have independent input select or
common select control
■ 100k PECL/ECL compatible logic
■ Available in 20-pin TSSOP package
The SY100EP56V is a high-speed, low-skew, fully
differential Dual PECL/ECL 2:1 multiplexer. This device is a
pin-for-pin, plug-in replacement to the MC10/100EP56DT.
Two separate 2:1 multiplexers (Channel 0 and Channel 1)
with dedicated select control pins (SEL0 and SEL1) are
implemented in a 20-pin TSSOP package. The signal-path
inputs (D0a, D0b and D1a, D1b) accept differential signals
as low as 150mV pk-pk. For applications that require
common select control for both channels A & B, a common
select pin (COM_SEL) is available. All I/O pins are 100k
PECL/ECL logic compatible.
AC–performance is guaranteed over the industrial –40°C
to +85°C temperature range and 3.0V to 5.5V supply voltage
range. This device will operate in PECL/LVPECL or ECL/
LVECL mode. The 500ps max (400 typ) propagation delay
is matched for all signal and logic select paths: D-to-QOUT,
SEL-to-QOUT, and COM_SEL-to-QOUT. Two VBB output
reference pins (approx equal to VCC –1.4V) are available
for AC–coupled or single-ended applications.
The SY100EP56V is part of Micrel’s high-speed, Precision
Edge timing and distribution family. For applications that
require a different 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.
Rev.: D Amendment: /0
Issue Date: December 2005
Micrel Semiconductor ON Semiconductor
SY100EP56VK4I MC100EP56DT
SY100EP56VK4ITR MC100EP56DTR2
CROSS REFERENCE TABLE
ECL Pro™
ECL Pro is a trademark of Micrel, Inc.
MUX SELECT TRUTH TABLE
SEL0 SEL1 COM_SEL Q0, /Q0 Q1, /Q1
XX Haa
LL Lbb
LH Lba
HH L aa
HL Lab
2
ECL Pro™
SY100EP56V
Micrel, Inc.
M9999-120505
hbwhelp@micrel.com or (408) 955-1690
PIN DESCRIPTION
Pin Pin Number Function
D0a, /D0a 1, 2, Channel 0 PECL/ECL differential signal inputs. Multiplexing of these two differential inputs is
D0b, /D0b 4, 5 controlled by SEL0, or COM_SEL. The signal inputs include internal 75kΩ pull-down resistors.
Default condition is LOW when left floating. The input signal should be terminated externally.
See “
Termination
” section
D1a, /D1a 6, 7 Channel 1 PECL/ECL differential signal inputs. Multiplexing of these two differential inputs is
D1b, /D1b 9, 10 controlled by SEL1, or COM_SEL. The signal inputs include internal 75kΩ pull-down resistors.
Default condition is a logic LOW when left floating. The input signal should be terminated
externally. See “
Termination
” section
VBB0, VBB1 3, 8 Channel 0 and Channel 1 reference output voltage. This reference is typically used to bias the
unused inverting input for single-ended input applications, or as the termination point for AC–
coupled differential input applications. VBB reference value is approximately VCC –1.4V, and tracks
VCC 1:1. Maximum sink/source capability is 0.50mA. For single ended PECL inputs, connect to
the unused input through a 50Ω resistor. Decouple the VBB pin with a 0.01µF capacitor. For PECL/
LVPECL inputs, the decoupling capacitor is connected to VCC, since PECL signals are referenced
to VCC. Leave floating if not used.
VEE 11 Negative Power Supply: For PECL/LVPECL applications, connect to GND.
/Q1, Q1 12, 13 Channel 1 100KEP PECL/ECL compatible differential output. PECL/ECL termination is with a 50Ω
resistor to VCC–2V. Unused output pairs may be left floating. Unused single-ended outputs must
have a balanced load. For AC-coupled applications, the output stage emitter follower must have a
DC current path to ground. See “
Termination
” section.
SEL1, SEL0 15, 17 100KEP PECL/ECL compatible Channel 1 and Channel 0 MUX select control. See “
MUX Select
Truth Table
.” Each pin includes an internal 75kΩ pull-down resistor. Default condition when left
floating is LOW.
COM_SEL 16 100KEP PECL/ECL compatible Channel 1 and Channel 0 Common MUX select control. This is
the common select control pin for both Channels 0 and 1. Includes an internal 75kΩ pull-down
resistor. Default condition when left floating is LOW. Leave floating when not used.
/Q0, Q0 18, 19 Channel 0 100K EP PECL/ECL compatible differential output. PECL/ECL termination is with a
50Ω resistor to VCC –2V. Unused output pairs may be left floating. Unused single-ended outputs
must have a balanced load. For AC–coupled applications, the output stage emitter follower must
have a DC current path to ground. See “
Termination
” section.
VCC 14, 20 Positive Power Supply: Both VCC pins must be connected to the same power supply externally.
Bypass with 0.1µF//0.01µF low ESR capacitors.
PACKAGE/ORDERING INFORMATION
20-Pin TSSOP (K4-20-1)
Ordering Information(1)
Package Operating Package Lead
Part Number Type Range Marking Finish
SY100EP56VK4I K4-20-1 Industrial XEP56V Sn-Pb
SY100EP56VK4ITR(2) K4-20-1 Industrial XEP56V Sn-Pb
SY100EP56VK4G(3) K4-20-1 Industrial XEP56V with Pb-Free
Pb-Free bar-line indicator NiPdAu
SY100EP56VK4GTR(2, 3) K4-20-1 Industrial XEP56V with Pb-Free
Pb-Free bar-line indicator NiPdAu
Notes:
1. Contact factory for die availability. Dice are guaranteed at TA = 25°C, DC Electricals only.
2. Tape and Reel.
3. Pb-Free package is recommended for new designs.
VBB0
D0b
/D0b
D1a
/D1a
VBB1
D1b
/D1b
18 /Q0
SEL0
COM_SEL
SEL1
VEE
17
16
15
14
13
12
11
19
20
1
2
3
4
5
6
7
8
9
10
D0a
/D0a
/Q1
Q1
VCC
Q0
VCC
1
0
1
0
3
ECL Pro™
SY100EP56V
Micrel, Inc.
M9999-120505
hbwhelp@micrel.com or (408) 955-1690
Symbol Rating Value Unit
VCC —V
EE Power Supply Voltage 6.0 V
VIN Input Voltage (VCC = 0V, VIN not more negative than VEE) –6.0 to 0 V
Input Voltage (VEE = 0V, VIN not more positive than VCC) +6.0 to 0 V
IOUT Output Current –Continuous 50 mA
–Surge 100
IBB VBB Sink/Source Current(2) ±0.5 mA
TLEAD Lead Temperature (soldering, 20sec.) +260 °C
TAOperating Temperature Range –40 to +85 °C
Tstore Storage Temperature Range –65 to +150 °C
θJA Package Thermal Resistance –Still-Air (single-layer PCB) 115 °C/W
(Junction-to-Ambient) –Still-Air (multi-layer PCB) 75
–500lfpm (multi-layer PCB) 65
θJC Package Thermal Resistance 21 °C/W
(Junction-to-Case)
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 ratlng conditions for extended
periods may affect device reliability.
2. Due to the limited drive capability, the VBB reference should only be used for inputs from the same package device (i.e., do not use for other
devices).
ABSOLUTE MAXIMUM RATINGS(1)
TA = –40°CT
A = +25°CT
A = +85°C
Symbol Parameter Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit Condition
VCC Power Supply Voltage V
(PECL) 4.5 5.0 5.5 4.5 5.0 5.5 4.5 5.0 5.5
(LVPECL) 3.0 3.3 3.8 3.0 3.3 3.8 3.0 3.3 3.8
(ECL) –5.5 –5.0 –4.5 –5.5 –5.0 –4.5 –5.5 –5.0 –4.5
(LVECL) –3.8 –3.3 –3.0 –3.8 –3.3 –3.0 –3.8 –3.3 –3.0
IEE Supply Current — 50 65 — 50 65 — 50 65 mA No Load
IIH Input HIGH Current — — 150 — — 150 — — 150 µAV
IN = VIH
IIL Input LOW Current
All Inputs
0.5 — — 0.5 — — 0.5 — — µAV
IN = VIL
CIN Input Capacitance (TSSOP) ————1.0————pF
Note:
1. 100KEP circuits are designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. The circuit is in
a test socket or mounted on a printed circuit board and traverse airflow greater than 500lfpm is maintained.
DC ELECTRICAL CHARACTERISTICS(1)
4
ECL Pro™
SY100EP56V
Micrel, Inc.
M9999-120505
hbwhelp@micrel.com or (408) 955-1690
TA = –40°CT
A = +25°CT
A = +85°C
Symbol Parameter Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit Condition
VIL Input LOW Voltage 1355 — 1675 1355 — 1675 1355 — 1675 mV
(Single-Ended)
VIH Input HIGH Voltage 2075 — 2420 2075 — 2420 2075 — 2420 mV
(Single-Ended)
VOL Outuput LOW Voltage 1355 1480 1605 1355 1480 1605 1355 1480 1605 mV
50Ω to V
CC
–2V
VOH Output HIGH Voltage 2155 2280 2405 2155 2280 2405 2155 2280 2405 mV
50Ω to V
CC
–2V
VBB Output Reference Voltage 1775 1875 1975 1775 1875 1975 1775 1875 1975 mV
VIHCMR Input HIGH Voltage(2) 2.0 — VCC 2.0 — VCC 2.0 — VCC V
Common Mode Range
(100KEP) LVPECL DC ELECTRICAL CHARACTERISTICS(1)
VCC = 3.3V ±10%, VEE = 0V
Notes:
1. 100KEP circuits are designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. The circuit is in
a test socket or mounted on a printed circuit board and traverse airflow greater than 500lfpm is maintained. Input and output parameters are at VCC =
3.3V. They vary 1:1 with VCC.
2. The VIHCMR range is referenced to the most positive side of the differential input signal.
TA = –40°CT
A = +25°CT
A = +85°C
Symbol Parameter Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit Condition
VIL Input LOW Voltage 3055 — 3375 3055 — 3375 3055 — 3375 mV
(Single-Ended)
VIH Input HIGH Voltage 3775 — 4120 3775 — 4120 3775 — 4120 mV
(Single-Ended)
VOL Outuput LOW Voltage 3055 3180 3305 3055 3180 3305 3055 3180 3305 mV
50Ω to V
CC
–2V
VOH Output HIGH Voltage 3855 3980 4105 3855 3980 4105 3855 3980 4105 mV
50Ω to V
CC
–2V
VBB Output Reference Voltage 3475 3575 3675 3475 3575 3675 3475 3575 3675 mV
VIHCMR Input HIGH Voltage(2) 2.0 — VCC 2.0 — VCC 2.0 — VCC V
Common Mode Range
(100KEP) PECL DC ELECTRICAL CHARACTERISTICS(1)
VCC = 5.0V ±10%, VEE = 0V
Notes:
1. 100KEP circuits are designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. The circuit is in
a test socket or mounted on a printed circuit board and traverse airflow greater than 500lfpm is maintained. Input and output parameters are at VCC =
5.0V. They vary 1:1 with VCC.
2. The VIHCMR range is referenced to the most positive side of the differential input signal.
5
ECL Pro™
SY100EP56V
Micrel, Inc.
M9999-120505
hbwhelp@micrel.com or (408) 955-1690
TA = –40°CT
A = +25°CT
A = +85°C
Symbol Parameter Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit Condition
VIL Input LOW Voltage –1945 — –1625 –1945 — –1625 –1945 — –1625 mV
VIH Input HIGH Voltage –1225 — –880 –1225 — –880 –1225 — –880 mV
VOL Outuput LOW Voltage –1945 –1820 –1695 –1945 –1820 –1695 –1945 –1820 –1695 mV
50Ω to V
CC
–2V
VOH Output HIGH Voltage –1145 –1020 –895 –1145 –1020 –895 –1145 –1020 –895 mV
50Ω to V
CC
–2V
VBB Output Reference Voltage –1525 –1425 –1325 –1525 –1425 –1325 –1525 –1425 –1325 mV
VIHCMR Input HIGH Voltage(2) VEE +2.0 0.0 VEE +2.0 0.0 VEE +2.0 0.0 V
Common Mode Range
(100KEP) ECL/LVECL DC ELECTRICAL CHARACTERISTICS(1)
VCC = 0V, VEE = –5.5V to –3.0V
Notes:
1. 100KEP circuits are designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. The circuit is in
a test socket or mounted on a printed circuit board and traverse airflow greater than 500lfpm is maintained.
2. The VIHCMR range is referenced to the most positive side of the differential input signal.
TA = –40°CT
A = +25°CT
A = +85°C
Symbol Parameter Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit Condition
fMAX Max. Toggle Frequency(1) 3——3——3——GHz
tPLH Propagation Delay (Differential)
tPHL D to Q, /Q 230 290 450 230 290 470 230 300 500 ps
SEL to Q, /Q 250 300 450 250 320 470 250 330 500 ps
COM_SEL to Q, /Q 250 350 450 250 360 470 250 400 500 ps
tSKEW Within-Device Skew(2) Q, /Q — 50 100 — 50 100 — 50 100 ps
Part-to-Part Skew(2) — — 200 — — 200 — — 200 ps
tJITTER Cycle-to-Cycle Jitter (rms) — 0.2 < 1 — 0.2 < 1 — 0.2 < 1 ps rms
Random Jitter ————<1————ps
rms Note 3
Deterministic Jitter
@1.25Gbps ————<25————ps
pk-pk Note 4
@2.5Gbps ————<50————
VDIFF Input Voltage (Differential) 150 800 1200 150 800 1200 150 800 1200 mV
tr, tfOutput Rise/Fall Time Q, /Q — 120 170 — 130 180 — 150 230 ps
(20% to 80%)
AC ELECTRICAL CHARACTERISTICS
VCC = 0V; VEE = –3.0V to –5.5V or VCC = 3.0V to 5.5V, VEE = 0V
Notes:
1. Measured with 750mV input signal, 50% duty cycle. Output swing ≥400mV. All loading with a 50Ω to VCC –2.0V.
2. 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.
3. RJ is measured with a K28.7 comma detect character pattern, measured at 1.25Gbps and 2.5Gbps.
4. DJ is measured at 1.25Gbps and 2.5Gbps, with both K28.5 and 223–1 PRBS pattern.
6
ECL Pro™
SY100EP56V
Micrel, Inc.
M9999-120505
hbwhelp@micrel.com or (408) 955-1690
TYPICAL OPERATING CHARACTERISTICS
VCC = 3.3V, VEE = GND, TA = 25°C, unless otherwise stated.
500MHz Output
TIME (300ps/div.)
Output Swing
(200mV/div.)
TA = 25°C
VCC = 3.3V
VEE GND
VIN = 800mV
/Q
Q
1.5GHz Output
TIME (100ps/div.)
Output Swing
(200mV/div.)
TA = 25°C
VCC = 3.3V
VEE GND
VIN = 800mV
/Q
Q
2.5GHz Output
TIME (60ps/div.)
Output Swing
(200mV/div.)
TA = 25°C
VCC = 3.3V
VEE GND
VIN = 800mV
/Q
Q
3.0GHz Output
TIME (55ps/div.)
Output Swing
(200mV/div.)
TA = 25°C
VCC = 3.3V
VEE GND
VIN = 800mV
/Q
Q
0
100
200
300
400
500
600
700
800
900
500
1000
1500
2000
2500
3000
3500
4000
OUTPUT AMPLITUDE (mV)
FREQUENCY (MHz)
Output Amplitude
vs. Frequency
T
A
= 25°C
V
CC
= 3.3V
V
IN
= 800mV
280
290
300
310
320
330
340
350
360
-40
-30
-20
-10
0
10
20
30
40
50
60
70
80
90
PROPAGATION DELAY (ps)
TEMPERATURE (°C)
Propagation Delay
vs. Temperature
T
A
= 25°C
V
CC
= 3.3V
V
IN
= 800mV
7
ECL Pro™
SY100EP56V
Micrel, Inc.
M9999-120505
hbwhelp@micrel.com or (408) 955-1690
TERMINATION RECOMMENDATIONS
R2
82Ω
R2
82Ω
ZO = 50Ω
ZO = 50Ω
+3.3V +3.3V
Vt = VCC —2V
R1
130Ω
R1
130Ω
+3.3V
Figure 1. Parallel Termination–Thevenin Equivalent
Note:
1. For +5.0V systems: R1 = 82Ω, R2 = 130Ω.
Z = 50Ω
Z = 50Ω
50Ω50Ω
50Ω
+3.3V +3.3V
source destination
RbC1 (optional)
0.01µF
Figure 2. Three-Resistor “Y–Termination”
Notes:
1. Power-saving alternative to Thevenin termination.
2. Place termination resistors as close to destination inputs as possible.
3. Rb resistor sets the DC bias voltage, equal to Vt. For +3.3V systems Rb = 46Ω to 50Ω. For +5V systems, Rb = 110Ω.
+3.3V +3.3V
Z
O
= 50Ω
R2
82Ω
+3.3V +3.3V
R1
130Ω
R1
130Ω
R2
82Ω
V
t
= V
CC
—2V
Q
/Q
50Ω
+3.3V
0.01µF
V
BB
Figure 3. Terminating Unused I/O
Notes:
1. Unused output (/Q) must be terminated to balance the output.
2. Micrel's differential I/O logic devices include a VBB reference pin .
3. Connect unused input through 50Ω to VBB. Bypass with a 0.01µF capacitor to VCC, not GND, as PECL is referenced to VCC.
4. For +2.5V systems: R1 = 250Ω, R2 = 62.5Ω.
8
ECL Pro™
SY100EP56V
Micrel, Inc.
M9999-120505
hbwhelp@micrel.com or (408) 955-1690
20-PIN TSSOP (K4-20-1)
± .10
± .004
+ .10
– .00
+ .004
– .000
± .05
± 0.002
+ .10
– .00
+ .004
– .000
± .10
± .004
Rev. 01
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL + 1 (408) 944-0800 FAX + 1 (408) 474-1000 WEB http://www.micrel.com
The information furnished by Micrel in this datasheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use.
Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can
reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into
the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser’s
use or sale of Micrel Products for use in life support appliances, devices or systems is at Purchaser’s own risk and Purchaser agrees to fully indemnify
Micrel for any damages resulting from such use or sale.
© 2005 Micrel, Incorporated.
