HCPL-2231 Low Input Current Logic Gate Optocouplers holt integrated circuits
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HCPL-2231Low Input Current Logic Gate Optocouplers holt integrated circuits
Features • 2.5 kV/µs Minimum Common Mode Rejection (CMR) at VCM = 400 V (HCPL-2219) • Compatible with LSTTL, TTL, and CMOS Logic • Wide VCC Range (4.5 to 20 V) • 2.5 Mbd Guaranteed over Temperature • Low Input Current (1.6 mA) • Three State Output (No Pullup Resistor Required) • Guaranteed Performance from 0°C to 85°C • Hysteresis • Safety Approval
Description The HCPL-2200/2219 are optically coupled logic gates that combine a GaAsP 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 resistor and allows for direct drive of data busses. The hysteresis provides differential mode noise immunity and eliminates the potential for output signal chatter.
A superior internal shield on the HCPL-2219 guarantees common mode transient immunity of 2.5 kV/µs at a common mode voltage of 400 volts.
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