Description
The FOD8012A is a half duplex, bi−directional, high−speed logic
gate Optocoupler, which supports isolated communications allowing
digital signals to communicate between systems without conducting
ground loops or hazardous voltages. It utilizes onsemi’s patented
coplanar packaging technology, OPTOPLANAR®, and optimized IC
design to achieve minimum 20 kV/s Common Mode Noise Rejection
(CMR) rating.
This high−speed logic gate optocoupler is highly integrated with 2
optically coupled channels arranged in bi−directional configuration,
and housed in a compact 8−pin small outline package. Each
optocoupler channel consists of a high−speed AlGaAs LED driven by
a CMOS buffer IC coupled to a CMOS detector IC. The detector IC
comprises of an integrated photodiode, a high−speed trans−impedance
amplifier and a voltage comparator with an output driver. The CMOS
technology coupled to the high efficiency of the LED achieves low
power consumption as well as very high speed (60 ns propagation
delay, 15 ns pulse width distortion).

Features
• Half Duplex, Bi−Directional
• 20 kV/s Minimum Common Mode Rejection
• High Speed:
♦ 15 Mbit/s Date Rate (NRZ)
♦ 60 ns Maximum Propagation Delay
♦ 15 ns Maximum Pulse Width Distortion
♦ 30 ns Maximum Propagation Delay Skew
• 3.3 V and 5 V CMOS Compatibility
• Extended Industrial Temperate Range, −40 to +110°C Temperature
Range
• Safety and Regulatory Approvals:
♦ UL1577, 3750 VACRMS for 1 min.
♦ DIN EN/IEC60747−5−5 (approval pending)

Applications
• Industrial Fieldbus Communications
♦ DeviceNet, CAN, RS485
• Microprocessor System Interface
♦ SPI, I2C
• Programmable Logic Control
• Isolated Data Acquisition System
• Voltage Level Translator