CD4027B: Power on Reset Circuit, External Diode Needed?

Fred Doe

Intellectual 655 points

Part Number: CD4027B

In this POR circuit for a 4027B flip flop, is D1 nessacery to protect the input diode of the 4027B?

Thank you!

over 4 years ago

0 Rami Mooti1 over 4 years ago

TI__Mastermind 35638 points

Hey Fred,

All the input diodes are already internally connected to both Vdd and Vss as shown below. Assuming here that you're running VSS to GND and referencing from there, D1 would already be taken care of internally so there is no need.

Thanks,
Rami

0 Fred Doe over 4 years ago in reply to Rami Mooti1

Intellectual 655 points

Thank you!

Logic

Logic forum

CD4027B: Power on Reset Circuit, External Diode Needed?