DESCRIPTION
s
5V and 3.3V power supplies required
s
Also, supports LVPECL-to-PECL translation
s
500ps propagation delays
s
Fully differential design
s
Differential line receiver capability
s
Application note
s
Available in 20-pin SOIC package
The SY100EL92 is a triple LVPECL-to-PECL or PECL-
to-LVPECL translator. The device receives standard PECL
signals and translates them to differential LVPECL output
signals (or vice versa). SY100EL92 can also be used as a
differential line receiver for PECL-to-PECL or LVPECL-to-
LVPECL signals. However, please note that for the latter
we will need two different power supplies. Please refer to
Function Table for more details.
V
BB
outputs are provided for interfacing single ended
input signals. If a single ended input is to be used, the V
BB
output should be connected to the D input and the active
signal will drive the D input. When used, the V
BB
should be
bypassed to V
CC
via a 0.01
F capacitor. The V
BB
is
designed to act as a switching reference for the SY100EL92
under single ended input conditions. As a result, the pin
can only source/sink 0.5mA of current.
To accomplish the PECL-to-LVPECL level translation,
the SY100EL92 requires three power rails. The V
CC
and
V
CC
_V
BB
supply is to be connected to the standard PECL
supply, the 3.3V supply is to be connected to the V
CCO
supply, and GND is connected to the system ground plane.
Both the V
CC
and V
CCO
should be bypassed to ground with
a 0.01
F capacitor.
To accomplish the LVPECL-to-PECL level translation,
the SY100EL92 requires three power rails as well. The 5.0V
supply is connected to the V
CC
and V
CCO
pins, 3.3V supply
is connected to the V
CC
_V
BB
pin and GND is connected to
the system ground plane. V
CC
_V
BB
is used to provide a
proper V
BB
output level if a single ended input is used. For
differential LVPECL input V
CC
_V
BB
can be either 3.3V or
5V.
Under open input conditions, the D input will be biased
at a V
CC
/2 voltage level and the D input will be pulled to
GND. This condition will force the "Q" output low, ensuring
stability.
FEATURES
TRIPLE LVPECL-TO-PECL
OR PECL-TO-LVPECL
TRANSLATOR
SY100EL92
Rev.: D
Amendment: /0
Issue Date: January, 1999
Function
Vcc
Vcco
Vcc_V
BB
PECL-to-LVPECL
5.0V
3.3V
5.0V
LVPECL-to-PECL
5.0V
5.0V
3.3V
PECL-to-PECL
5.0V
5.0V
5.0V
LVPECL-to-LVPECL
5.0V
3.3V
3.3V
FUNCTION TABLE
Pin
Function
Dn
PECL / LVPECL Inputs
Q
n
PECL / LVPECL Outputs
V
BB
PECL / LVPECL Reference Voltage Output
V
CCO
V
CC
for Output
V
CC
_V
BB
V
CC
for V
BB
Output
GND
Common Ground Rail
V
CC
V
CC
for Internal Circuitry
PIN NAMES
PIN CONFIGURATION/BLOCK DIAGRAM
SOIC
TOP VIEW
V
CC_
V
BB
V
BB
V
BB
V
CC
V
CCO
V
CCO
V
CC
D
2
D
1
D
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
D
2
GND
Q
0
Q
0
Q
1
Q
2
Q
1
Q
2
D
1
D
0
1
2
SY100EL92
Micrel
PECL INPUT DC ELECTRICAL CHARACTERISTICS
V
CC
_V
BB
= V
CC
= +4.5V to +5.5V; V
CCO
= +3.0V to +3.8V
T
A
= 40
C
T
A
= 0
C
T
A
= +25
C
T
A
= +85
C
Symbol
Parameter
Min.
Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max.
Unit
V
CC
Power Supply Voltage
4.5
--
5.5
4.5
--
5.5
4.5
--
5.5
4.5
--
5.5
V
V
IH
Input HIGH Voltage
(1)
3.835
--
4.120
3.835
--
4.120
3.835
--
4.120
3.835
--
4.120
V
V
IL
Input LOW Voltage
(1)
3.190
--
3.515
3.190
--
3.525
3.190
--
3.525
3.190
--
3.525
V
V
PP
Minimum Peak-to-Peak
150
--
--
150
--
--
150
--
--
150
--
--
mV
Input
I
IH
Input HIGH Current
--
--
150
--
--
150
--
--
150
--
--
150
A
I
IL
Input LOW Current
Dn
0.5
--
--
0.5
--
--
0.5
--
--
0.5
--
--
A
Dn
600
--
--
600
--
--
600
--
--
600
--
--
V
BB
Output Reference
(1)
3.620
--
3.740
3.620
--
3.740
3.620
--
3.740
3.620
--
3.740
V
I
CC
Power Supply Current
--
--
12
--
--
12
--
8.0
12
--
--
12
mA
NOTE:
1. These levels are for V
CC_
V
BB
= 5.0V. Level specifications will vary 1:1 with V
CC_
V
BB.
LVPECL OUTPUT DC ELECTRICAL CHARACTERISTICS
V
CC
_V
BB
= V
CC
= +4.5V to +5.5V; V
CCO
= +3.0V to +3.8V
T
A
= 40
C
T
A
= 0
C
T
A
= +25
C
T
A
= +85
C
Symbol
Parameter
Min.
Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max.
Unit
V
CCO
Power Supply Voltage
3.0
--
3.8
3.0
--
3.8
3.0
3.3
3.8
3.0
--
3.8
V
V
OH
Output HIGH Voltage
(1)
2.215
--
2.420
2.275
--
2.420
2.275 2.350 2.420 2.275
--
2.420
V
V
OL
Output LOW Voltage
(1)
1.470
--
1.745
1.490
--
1.680
1.490 1.600 1.680 1.490
--
1.680
V
I
CCO
Power Supply Current
--
--
20
--
--
20
--
15
20
--
--
21
mA
NOTE:
1. These levels are for V
CCO
= 3.3V. Level specifications will vary 1:1 with V
CCO
.
LVPECL INPUT DC ELECTRICAL CHARACTERISTICS
V
CC
_V
BB
= +3.0V to +3.8V
(1)
; V
CC
= V
CCO
= +4.5V to +5.5V
T
A
= 40
C
T
A
= 0
C
T
A
= +25
C
T
A
= +85
C
Symbol
Parameter
Min.
Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max.
Unit
V
CC
Power Supply Voltage
4.5
--
5.5
4.5
--
5.5
4.5
--
5.5
4.5
--
5.5
V
V
IH
Input HIGH Voltage
(2)
2.135
--
2.420
2.135
--
2.420
2.135
--
2.420
2.135
--
2.420
V
V
IL
Input LOW Voltage
(2)
1.490
--
1.825
1.490
--
1.825
1.490
--
1.825
1.490
--
1.825
V
V
PP
Minimum Peak-to-Peak
150
--
--
150
--
--
150
--
--
150
--
--
mV
Input
I
IH
Input HIGH Current
--
--
150
--
--
150
--
--
150
--
--
150
A
I
IL
Input LOW Current
Dn
0.5
--
--
0.5
--
--
0.5
--
--
0.5
--
--
A
Dn
600
--
--
600
--
--
600
--
--
600
--
--
V
BB
Output Reference
(2)
1.92
--
2.04
1.92
--
2.04
1.92
--
2.04
1.92
--
2.04
V
I
CC
Power Supply Current
--
--
12
--
--
12
--
8.0
12
--
--
12
mA
NOTES:
1. V
CC
_V
BB
= 3.3V is only required for single-ended LVPECL input. For differential LVPECL input, V
CC
_V
BB
can be either 3.3V or 5V.
2. These levels are for V
CC
_
V
BB
= 3.3V. Level specifications will vary 1:1 with V
CC
_
V
BB
.
3
SY100EL92
Micrel
PECL OUTPUT DC ELECTRICAL CHARACTERISTICS
V
CC
_V
BB
= +3.0V to +3.8V; V
CC
= V
CCO
= +4.5V to +5.5V
T
A
= 40
C
T
A
= 0
C
T
A
= +25
C
T
A
= +85
C
Symbol
Parameter
Min.
Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max.
Unit
V
CCO
Power Supply Voltage
4.5
--
5.5
4.5
--
5.5
4.5
--
5.5
4.5
--
5.5
V
V
OH
Output HIGH Voltage
(1)
3.915
--
4.120
3.975
--
4.120
3.975
--
4.120
3.975
--
4.120
V
V
OL
Output LOW Voltage
(1)
3.170
--
3.445
3.190
--
3.380
3.190
--
3.380
3.190
--
3.380
V
I
CCO
Power Supply Current
--
--
20
--
--
20
--
15
20
--
--
21
mA
NOTE:
1. These levels are for V
CCO
= 5.0V. Level specifications will vary 1:1 with V
CCO
.
AC ELECTRICAL CHARACTERISTICS
(1)
T
A
= 40
C
T
A
= 0
C
T
A
= +25
C
T
A
= +85
C
Symbol
Parameter
Min.
Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max. Unit
t
PLH
Propagation Delay
Diff.
430
520
630
430
520
630
430
520
630
430
520
630
ps
t
PHL
D to Q
S.E.
410
540
710
410
540
710
410
540
710
410
540
710
t
skew
Within-Device Skew
Output-to-Output
(2)
--
20
100
--
20
100
--
20
100
--
20
100
ps
Part-to-Part (Diff.)
(2)
--
20
200
--
20
200
--
20
200
--
20
200
Duty Cycle (Diff.)
(3)
--
25
--
--
25
--
--
25
--
--
25
--
V
PP
Minimum Input Swing
(4)
150
--
--
150
--
--
150
--
--
150
--
--
mV
V
CMR
Common Mode Range
(5)
V
V
PP
< 500mV
1.3
--
V
CC
0.2
1.2
--
V
CC
0.2
1.2
--
V
CC
0.2
1.2
--
V
CC
0.2
V
PP
500mV
1.5
--
V
CC
0.2
1.4
--
V
CC
0.2
1.4
--
V
CC
0.2
1.4
--
V
CC
0.2
t
r
Output Rise/Fall Times Q
320
--
580
320
--
580
320
--
580
320
--
580
ps
t
f
(20% to 80%)
NOTES:
1. Power supply requirements applies as indicated in the DC electrical characteristics tables.
2. Skew is measured between outputs under identical transitions.
3. Duty cycle skew is the difference between a TPLH and TPHL propagation delay through a device Common Mode Range.
4. Minimum input swing for which AC parameters are guaranteed. The device has a DC gain of ~40.
5. The CMR range is referenced to the most positive side of the differential input signal. Normal operation is obtained if the HIGH level falls within the specified
range and the peak-to-peak voltage lies between V
PP
min. and 1V.
PRODUCT ORDERING CODE
Ordering
Package
Operating
Code
Type
Range
SY100EL92ZC
Z20-1
Commercial
SY100EL92ZCTR
Z20-1
Commercial
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