FOD2200_08 Datasheet, PDF (1/11 Pages) Fairchild Semiconductor – Low Input Current Logic Gate Optocouplers

August 2008
FOD2200
Low Input Current Logic Gate Optocouplers
Features
■ 1kV/µs minimum common mode rejection
■ Compatible with LSTTL, TTL, and CMOS logic
■ Wide V_CC range (4.5V to 20V)
■ 2.5Mbd guaranteed over temperature
■ Low input current (1.6mA)
■ Three state output (no pullup resistor required)
■ Guaranteed performance from 0°C to 85°C
■ Hysteresis
■ Safety approvals pending – UL, CSA, VDE
■ V_ISO = 5kVRMS
Applications
■ Isolation of high speed logic systems
■ Computer peripheral interfaces
■ Microprocessor system interfaces
■ Ground loop elimination
■ Pulse transformer replacement
■ Isolated bus driver
■ High speed line receiver
Description
The FOD2200 is an optically coupled logic gate that
combine an AlGaAs LED and an integrated high gain
photo detector. The detector has a three state output
stage and has a detector threshold with hysteresis. The
three state output eliminates the need for a pullup resis-
tor and allows for direct drive of data busses. The hyster-
esis provides differential mode noise immunity and
eliminates the potential for output signal chatter.
The Electrical and Switching Characteristics of the
FOD2200 are guaranteed over the temperature range of
0°C to 85°C and a V_CC range of 4.5V to 20V. Low I_F and
wide V_CC range allow compatibility with TTL, LSTTL, and
CMOS logic and result in lower power consumption
compared to other high speed opto-couplers. Logic
signals are transmitted with a maximum propagation
delay of 300ns. The FOD2200 is useful for isolating high
speed logic interfaces, buffering of input and output
lines, and implementing isolated line receivers in high
noise environments.
Truth Table (Positive Logic)
LED
On
Off
On
Off
Enable
H
H
L
L
Output
Z
Z
H
L
Functional Block Diagram and Schematic
NC 1
ANODE 2
CATHODE 3
NC 4
SHIELD
8 V_CC
7 V_O
6 V_E
5 GND
I_F
+
2
V_F
–
3
SHIELD
©2004 Fairchild Semiconductor Corporation
FOD2200 Rev. 1.0.1
Package Outlines
I_CC
8 ^VCC
8
I_O
7 ^VO
I_E
6 ^VE
GND
8
5
1
1
8
1
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