QUINT LVPECL-TO-PECL
OR PECL-TO-LVPECL
TRANSLATOR
FEATURES
s
s
s
s
s
3.3V and 5V power supplies required
Also, supports LVPECL-to-PECL translation
500ps propagation delays
Fully differential design
Differential line receiver capability
SY100E417
FINAL
DESCRIPTION
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 0.01µF 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 0.01µF 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.
s
Available in 28-pin PLCC package
BLOCK DIAGRAM
D
0
D
0
D
1
D
1
D
2
D
2
D
3
D
3
D
4
D
4
V
BB
Q
0
Q
0
Q
1
Q
1
Q
2
Q
2
Q
3
Q
3
Q
4
Q
4
FUNCTION TABLE
Function
PECL-to-LVPECL
LVPECL-to-PECL
PECL-to-PECL
LVPECL-to-LVPECL
Vcc
5.0V
5.0V
5.0V
5.0V
Vcco
3.3V
5.0V
5.0V
3.3V
Vcc_V
BB
5.0V
3.3V
5.0V
3.3V
Rev.: B
Amendment: /1
1
Issue Date: March, 1999
Micrel
SY100E417
LVPECL OUTPUT DC ELECTRICAL CHARACTERISTICS
V
CC
= +4.5V to +5.5V; V
CCO
= +3.0V to 3.8V
T
A
= –40
°
C
Symbol
V
CCO
V
OH
V
OL
I
CCO
Parameter
Power Supply Voltage
Output HIGH Voltage
(1)
Output LOW Voltage
(1)
Power Supply Current
Min.
3.0
2.215
1.470
—
Typ.
—
—
—
—
Max.
3.8
2.420
1.745
35
3.0
2.275
1.490
—
T
A
= 0
°
C
Min. Typ.
—
—
—
—
Max.
3.8
Min.
3.0
T
A
= +25
°
C
Typ.
3.3
Max.
3.8
3.0
T
A
= +85
°
C
Min.
Typ.
—
—
—
—
Max.
3.8
2.420
1.680
37
Unit
V
V
V
mA
2.420 2.275 2.350 2.420 2.275
1.680 1.490 1.600 1.680 1.490
35
—
23
35
—
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
Symbol
V
CC
V
IH
V
IL
V
PP
I
IH
I
IL
V
BB
I
CC
Parameter
Power Supply Voltage
Input HIGH Voltage
(2)
Input LOW Voltage
(2)
Minimum Peak-to-Peak
T
A
= 0
°
C
Min.
4.5
2.135
1.490
T
A
= +25
°
C
Max.
5.5
2.420
1.825
T
A
= +85
°
C
Min.
4.5
2.135
1.490
Min.
4.5
2.135
1.490
Typ.
—
—
—
Max.
5.5
2.420
1.825
Typ.
—
—
—
Min.
4.5
2.135
1.490
Typ.
—
—
—
Max.
5.5
2.420
1.825
Typ.
—
—
—
Max.
5.5
2.420
1.825
Unit
V
V
V
150
—
—
—
—
—
—
—
150
—
—
2.04
150
—
0.5
–600
1.92
—
—
—
—
—
—
150
—
—
2.04
150
—
0.5
–600
1.92
—
—
—
—
—
—
150
—
—
2.04
150
—
0.5
–600
1.92
—
—
—
—
—
—
150
—
—
2.04
mV
µA
µA
Input
Input HIGH Current
Input LOW Current
Output Reference
(2)
Dn
Dn
0.5
–600
1.92
V
mA
Power Supply Current
—
—
20
—
—
20
—
14
20
—
—
20
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
Micrel
SY100E417
PECL OUTPUT DC ELECTRICAL CHARACTERISTICS
VCC = V
CCO
= +4.5V to +5.5V
T
A
= –40
°
C
Symbol
V
CCO
V
OH
V
OL
I
CCO
Parameter
Power Supply Voltage
Output HIGH Voltage
(1)
Output LOW Voltage
(1)
Power Supply Current
Min.
4.5
3.915
3.170
T
A
= 0
°
C
Min. Typ.
4.5
3.975
3.190
T
A
= +25
°
C
Max.
5.5
4.120
3.380
T
A
= +85
°
C
Min.
4.5
3.975
3.190
Typ.
—
—
—
Max.
5.5
4.120
3.445
Min.
4.5
3.975
3.190
Typ.
—
—
—
Max.
5.5
4.120
3.380
Typ.
—
—
—
Max.
5.5
4.120
3.380
Unit
V
V
V
—
—
—
—
—
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
Symbol
t
PLH
t
PHL
t
skew
Parameter
Propagation Delay
D to Q
Diff.
S.E.
Min. Typ.
410
380
—
—
—
150
1.3
1.5
320
510
530
20
20
25
—
—
—
—
Max.
610
680
100
200
—
—
V
CC
–0.2
V
CC
–0.2
T
A
= 0
°
C
Min.
410
380
—
—
—
150
1.2
1.4
320
Typ.
510
530
20
20
25
—
—
—
—
Max.
610
680
100
200
—
—
V
CC
–0.2
V
CC
–0.2
T
A
= +25
°
C
Min.
410
380
—
—
—
150
1.2
1.4
320
Typ.
510
530
20
20
25
—
—
—
—
Max.
610
680
100
200
—
—
V
CC
–0.2
V
CC
–0.2
T
A
= +85
°
C
Min.
410
380
—
—
—
150
1.2
1.4
320
Typ.
510
530
20
20
25
—
—
—
—
Max. Unit
610
680
100
200
—
—
V
CC
–0.2
V
CC
–0.2
ps
Within-Device Skew
Output-to-Output
(2)
Part-to-Part (Diff.)
(2)
Duty Cycle (Diff.)
(3)
Minimum Input Swing
(4)
Common Mode Range
(5)
V
PP
< 500mV
V
PP
≥
500mV
Output Rise/Fall Times Q
(20% to 80%)
ps
V
PP
V
CMR
mV
V
t
r
t
f
580
580
580
580
ps
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
Code
SY100E417JC
SY100E417JCTR
Package
Type
J28-1
J28-1
Operating
Range
Commercial
Commercial
Ordering
Code
SY100E417JI
SY100E417JITR
Package
Type
J28-1
J28-1
Operating
Range
Industrial
Industrial
4
无线连接
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
