Cmos line receiver

  
The trip point is set half way between the supplies by Rl and R2; R3 provides over 200 mV of hysteresis to increase noise immunity. Maximum frequency of operation is about 300 kHz. If response to TTL levels is desired, change R2 to 39 K
Cmos line receiver - schematic

The trip point is now centered at 1 V.




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