FOD073L

LVTTL/LVCMOS COMPATIBLE LOW INPUT CURRENT HIGH GAIN SPLIT DARLINGTON OPTOCOUPLERS

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LVTTL/LVCMOS COMPATIBLE LOW INPUT CURRENT HIGH GAIN SPLIT DARLINGTON OPTOCOUPLERS
SINGLE CHANNEL: DUAL CHANNEL:
DESCRIPTION
The FOD070L, FOD270L and FOD073L optocouplers consist of an AlGaAs LED optically coupled to a high gain split darlington photodetector. These devices are specified to operate at a 3.3V supply voltage. The split darlington configuration separating the input photodiode and the first stage gain from the output transistor permits lower output saturation voltage and higher speed operation than possible with conventional darlington phototransistor optocoupler. In the dual channel device FOD073L, an integrated emitter base resistor provides superior stability over temperature. The combination of a very low input current of 0.5 mA and a high current transfer ratio of 2000% makes this family particularly useful for input interface to MOS, CMOS, LSTTL and EIA RS232C, while output compatibility is ensured to LVCMOS as well as high fan-out LVTTL requirements. An internal noise shield provides exceptional common mode rejection of 10 kV/ s.
8 1 8 1

FOD070L FOD073L

FOD270L

8 1

FEATURES
Low power consumption Low input current - 0.5 mA Available in single channel 8-pin DIP (FOD270L), 8-pin SOIC (FOD070L) and dual channel 8-pin SOIC High CTR-2000% High CMR-10 kV/ s Guaranteed performance over temperature 0 C to 70 C U.L. recognized (File E90700) LVTTL/LVCMOS Compatible output
N/C 1 8 VCC 1 V 2 VF 3 6 VO V N/C 4 5 GND 3 6 V02 7 VB
F1

8 VCC

7 V01

5 GND

FOD070L / FOD270L

FOD073L

APPLICATIONS
Digital logic ground isolation LVTTL/LVCMOS Telephone ring detector EIA-RS-232C line receiver High common mode noise line receiver P bus isolation Current loop receiver

TRUTH TABLE
LED ON OFF VO LOW HIGH

2004 Fairchild Semiconductor Corporation

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8/10/04