MICREL SY100EL92 Datasheet
TRIPLE LVPECL-TO-PECL
B
B
B
2
0
0
OR PECL-TO-LVPECL
TRANSLATOR
SY100EL92
FEATURES
■ 5V and 3.3V power supplies required
■ Also, supports LVPECL-to-PECL translation
■ 500ps propagation delays
■ Fully differential design
■ Differential line receiver capability
■ Application note
■ Available in 20-pin SOIC package
PIN CONFIGURATION/BLOCK DIAGRAM
19
18
17
16
15
14
13
12
20
V
Q
Q
V
Q
Q
V
Q
Q
V
CC
0
0
CCO
1
1
CCO
2
2
CC
V
CC_VB
1
2
D
3
D
4
V
B
5
D
1
D
1
6
7
V
B
8
D
D
2
9
GND
10 11
SOIC
TOP VIEW
DESCRIPTION
The SY100EL92 is a triple LVPECL-to-PECL or PECLto-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-toLVPECL signals. However, please note that for the latter
we will need two different power supplies. Please refer to
Function Table for more details.
VBB outputs are provided for interfacing single ended
input signals. If a single ended input is to be used, the VBB
output should be connected to the D input and the active
signal will drive the D input. When used, the VBB should be
bypassed to VCC via a 0.01µF capacitor. The VBB 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 VCC and
VCC_VBB supply is to be connected to the standard PECL
supply, the 3.3V supply is to be connected to the VCCO
supply, and GND is connected to the system ground plane.
Both the VCC and VCCO should be bypassed to ground with
a 0.01µF 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 VCC and VCCO pins, 3.3V supply
is connected to the VCC_VBB pin and GND is connected to
the system ground plane. VCC_VBB is used to provide a
proper VBB output level if a single ended input is used. For
differential LVPECL input VCC_VBB can be either 3.3V or
5V.
Under open input conditions, the D input will be biased
at a VCC/2 voltage level and the D input will be pulled to
GND. This condition will force the "Q" output low, ensuring
stability.
FUNCTION TABLE
Function Vcc Vcco Vcc_VBB
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
PIN NAMES
Pin Function
Dn PECL / LVPECL Inputs
Qn PECL / LVPECL Outputs
VBB PECL / LVPECL Reference Voltage Output
VCCO VCC for Output
VCC_VBB VCC for VBB Output
GND Common Ground Rail
V
CC VCC for Internal Circuitry
Rev.: D Amendment: /0
1
Issue Date: January, 1999
Micrel
SY100EL92
PECL INPUT DC ELECTRICAL CHARACTERISTICS
VCC_VBB = VCC = +4.5V to +5.5V; VCCO = +3.0V to +3.8V
TA = –40°CTA = 0°CTA = +25°CTA = +85°C
Symbol Parameter Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit
VCC Power Supply Voltage 4.5 — 5.5 4.5 — 5.5 4.5 — 5.5 4.5 — 5.5 V
VIH Input HIGH Voltage
VIL Input LOW Voltage
VPP Minimum Peak-to-Peak 150 — — 150 — — 150 — — 150 — — mV
Input
IIH Input HIGH Current — — 150 — — 150 — — 150 — — 150 µA
IIL Input LOW Current Dn 0.5 — — 0.5 — — 0.5 — — 0.5 — — µA
VBB Output Reference
CC Power Supply Current — — 12 — — 12 — 8.0 12 — — 12 mA
I
NOTE:
1. These levels are for VCC_VBB = 5.0V. Level specifications will vary 1:1 with VCC_VBB.
(1)
(1)
3.835 — 4.120 3.835 — 4.120 3.835 — 4.120 3.835 — 4.120 V
3.190 — 3.515 3.190 — 3.525 3.190 — 3.525 3.190 — 3.525 V
Dn –600 — — –600 — — –600 — — –600 — —
(1)
3.620 — 3.740 3.620 — 3.740 3.620 — 3.740 3.620 — 3.740 V
LVPECL OUTPUT DC ELECTRICAL CHARACTERISTICS
VCC_VBB = VCC = +4.5V to +5.5V; VCCO = +3.0V to +3.8V
TA = –40°CTA = 0°CTA = +25°CTA = +85°C
Symbol Parameter Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit
VCCO Power Supply Voltage 3.0 — 3.8 3.0 — 3.8 3.0 3.3 3.8 3.0 — 3.8 V
VOH Output HIGH Voltage
VOL Output LOW Voltage
CCO Power Supply Current — — 20 — — 20 — 15 20 — — 21 mA
I
NOTE:
1. These levels are for VCCO = 3.3V. Level specifications will vary 1:1 with VCCO.
(1)
2.215 — 2.420 2.275 — 2.420 2.275 2.350 2.420 2.275 — 2.420 V
(1)
1.470 — 1.745 1.490 — 1.680 1.490 1.600 1.680 1.490 — 1.680 V
LVPECL INPUT DC ELECTRICAL CHARACTERISTICS
VCC_VBB = +3.0V to +3.8V
Symbol Parameter Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit
VCC Power Supply Voltage 4.5 — 5.5 4.5 — 5.5 4.5 — 5.5 4.5 — 5.5 V
VIH Input HIGH Voltage
VIL Input LOW Voltage
VPP Minimum Peak-to-Peak 150 — — 150 — — 150 — — 150 — — mV
Input
IIH Input HIGH Current — — 150 — — 150 — — 150 — — 150 µA
IIL Input LOW Current Dn 0.5 — — 0.5 — — 0.5 — — 0.5 — — µA
VBB Output Reference
CC Power Supply Current — — 12 — — 12 — 8.0 12 — — 12 mA
I
NOTES:
1. VCC_VBB = 3.3V is only required for single-ended LVPECL input. For differential LVPECL input, VCC_VBB can be either 3.3V or 5V.
2. These levels are for VCC_VBB = 3.3V. Level specifications will vary 1:1 with VCC_VBB.
(1)
; VCC = VCCO = +4.5V to +5.5V
TA = –40°CTA = 0°CTA = +25°CTA = +85°C
(2)
(2)
2.135 — 2.420 2.135 — 2.420 2.135 — 2.420 2.135 — 2.420 V
1.490 — 1.825 1.490 — 1.825 1.490 — 1.825 1.490 — 1.825 V
Dn –600 — — –600 — — –600 — — –600 — —
(2)
1.92 — 2.04 1.92 — 2.04 1.92 — 2.04 1.92 — 2.04 V
2
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