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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.
FOD070L Maximum Ratings
Parameter
Symbol
Value
Units
Storage Temperature
TSTG
-40 to +125
°C
Operating Temperature
TOPR
-40 to +85
°C
Lead Solder Temperature (Wave solder only. See reflow profile for surface mount devices)
TSOL
260 for 10 sec
°C
EMITTER
DC/Average Forward Input Current Each Channel
IF(avg)
20
mA
Peak Forward Input Current (50% duty cycle, 1 ms P.W.) Each Channel
IF(pk)
40
mA
Peak Transient Input Current - ( 1 s P.W., 300 pps) Each Channel
IF(trans)
1.0
A
Reverse Input Voltage Each Channel
VR
5
V
Input Power Dissipation Each Channel
PD
35
MW
DETECTOR
Average Output Current Each Channel
IO(avg)
60
mA
Emitter-Base Reverse Voltage (FOD070L, FOD270L) Each Channel
VEB
0.5
V
Supply Voltage, Output Voltage Each Channel
VO,VCC
-0.5 to 7
V
Output power dissipation Each Channel
PD
100
mW
FOD070L 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
FOD070L Typical Application
• 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