DESCRIPTION
s
3.3V and 5V power supplies required
s
Also, supports LVPECL-to-PECL translation
s
500ps propagation delays
s
Fully differential design
s
Differential line receiver capability
s
Available in 28-pin PLCC package
The SY100E417 is a quint LVPECL-to-PECL translator.
It can also be used as a quint PECL-to-LVPECL translator.
The device receives standard PECL signals and translates
them to differential LVPECL output signals (or vice versa).
The SY100E417 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.
A V
BB
output is 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 Dn input and the active
signal will drive the Dn 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 SY100E417
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 SY100E417 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 SY100E417 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.
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 5.0V.
Under open input conditions, the Dn input will be biased
at a V
CC
/2 voltage level and the Dn input will be pulled to
GND. This condition will force the "Qn" output low, ensuring
stability.
FEATURES
QUINT LVPECL-TO-PECL
OR PECL-TO-LVPECL
TRANSLATOR
SY100E417
Rev.: B
Amendment: /1
Issue Date:
March, 1999
BLOCK DIAGRAM
D
0
D
0
Q
0
Q
0
D
1
D
1
Q
1
Q
1
D
2
D
2
Q
2
Q
2
D
3
D
3
Q
3
Q
3
D
4
D
4
Q
4
Q
4
V
BB
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
1
3
SY100E417
Micrel
LVPECL OUTPUT DC ELECTRICAL CHARACTERISTICS
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
--
--
35
--
--
35
--
23
35
--
--
37
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
= +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
--
--
20
--
--
20
--
14
20
--
--
20
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
.
4
SY100E417
Micrel
PECL OUTPUT DC ELECTRICAL CHARACTERISTICS
VCC = 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
--
--
35
--
--
35
--
23
35
--
--
37
mA
NOTES:
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.
410
510
610
410
510
610
410
510
610
410
510
610
ps
t
PHL
D to Q
S.E.
380
530
680
380
530
680
380
530
680
380
530
680
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
SY100E417JC
J28-1
Commercial
SY100E417JCTR
J28-1
Commercial
Ordering
Package
Operating
Code
Type
Range
SY100E417JI
J28-1
Industrial
SY100E417JITR
J28-1
Industrial
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