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Fairchild Semiconductor |
October 2006
FOD050L, FOD250L: Single Channel
FOD053L: Dual Channel
LVTTL/LVCMOS 3.3V High Speed Transistor Optocouplers
Features
■ Low power consumption
■ High speed
■ Available in single channel 8-pin DIP (FOD250L),
8-pin SOIC (FOD050L) or dual channel 8-pin SOIC
(FOD053L)
■ Superior CMR – CMH = 50kV/µs (typical) and
CML = 35kV/µs (typical)
■ Guaranteed performance over temperature:
0°C to 70°C
■ U.L. recognized (File # E90700)
■ VDE pending
Applications
■ Line receivers
■ Pulse transformer replacement
■ High speed logic ground isolation: LVTTL/LVCMOS
■ Wide bandwidth analog coupling
Description
The FOD250L, FOD050L and FOD053L optocouplers
consist of an AlGaAs LED optically coupled to a high
speed photodetector transistor. These devices are speci-
fied for operation at a 3.3V supply voltage.
A separate connection for the bias of the photodiode
improves the speed by several orders of magnitude over
conventional
phototransistor optocouplers by reducing the base-col-
lector capacitance of the input transistor.
An internal noise shield provides superior common
mode rejection of CMH = 50kV/ms (typical) and CML =
35kV/ms (typical).
Schematic
N/C 1
+2
V
F
_3
N/C 4
8
V
CC
7
V
B
6V
O
5 GND
+1
V
F1
_2
_3
V
F2
+4
8
V
CC
7
V
01
6
V
02
5 GND
8
1
8
1
8
1
FOD050L, FOD250L
Truth Table
LED
On
Off
VO
LOW
HIGH
FOD053L
©2002 Fairchild Semiconductor Corporation
FOD050L, FOD250L, FOD053L Rev. 1.0.0
1
www.fairchildsemi.com
Absolute Maximum Ratings (TA = 25°C Unless otherwise specified.)
Symbol
Parameter
TSTG
TOPR
TSOL
EMITTER
Storage Temperature
Operating Temperature
Lead Solder Temperature (Wave solder only)
IF (avg)
IF (pk)
DC/Average Forward Input Current
Peak Forward Input Current
(50% duty cycle, 1ms P.W.)
Each Channel
Each Channel
IF (trans) Peak Transient Input Current
(≤1 µs P.W., 300pps)
Each Channel
VR Reverse Input Voltage
PD Input Power Dissipation
(No derating required up to 85°C)
Each Channel
Each Channel
DETECTOR
IO (avg)
IO (pk)
VEBR
VCC
VO
IB
PD
Average Output Current
Peak Output Current
Emitter-Base Reverse Voltage
Supply Voltage
Output Voltage
Base Current
Output Power Dissipation
(No derating required up to 85°C)
Each Channel
Each Channel
FOD050L, FOD250L only
FOD050L, FOD250L only
Each Channel
Value
-40 to +125
-40 to +85
260 for 10 sec
Units
°C
°C
°C
25 mA
50 mA
1.0 A
5V
45 mW
8
16
5
-0.5 to 7
-0.5 to 7
5
100
mA
mA
V
V
V
mA
mW
FOD050L, FOD250L, FOD053L Rev. 1.0.0
2
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