SN74LVC1G123: Behavior

Hi Allan,

The SN74LVC1G123 supports rising edge trigger on B input if A is held low and falling edge on A if B is held low. However, SN74LVC1G123 will not allow you to do both rising and falling edge triggers from the same input at the same time without additional circuitry. It also doesn't output a low pulse, so you'd need to have an inverter on the output.

Take a look at TPUL2G123 to see if it would suit your needs. However, if you want rising and falling edge triggers, the output would come from two different outputs. You could OR them together to make a single output.

Another option is our TPLD devices which can all be configured in the way you've described. A rising and falling edge triggered one shot low pulse is a common application of TPLD. This is your single-device option.

Regards,

Nikki