Datasheet

Switching performance of the HCPL-2400/30 optocou-

plers is not sensitive to the TTL logic family used in the

recommended drive circuit. The typical and worst-case

switching parameters given in the data sheet can be

met using common 74LS TTL inverting gates or buers.

Use of faster TTL families will slightly reduce the overall

propagation delays from the input of the drive circuit to

the output of the optocoupler, but will not necessarily

result in lower pulse-width distortion or propagation de-

lay skew. This reduction in overall propagation delay is

due to shorter delays in the drive circuit, not to changes

in the propagation delays of the optocoupler; optocou-

pler propagation delays are not aected by the speed of

the logic used in the drive circuit.

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AV02-0962EN - January 4, 2008