CD4048B: Kd pin functionality

Sushant Patil25

Part Number: CD4048B

Hi,

We are using CD4048B for one of the project. As per datasheet Kd pin is used for 3-state output or logic 1 and 0 output (Page-3-137). But as per page 3-140, Kd = 1 -> Normal inverter Action or Kd= 0 -> High impedance output.

This IC i am using as a AND gate and tied Kd pin to Vcc. Is it will work as AND or NAND gate ?

over 5 years ago

0 Dylan Hubbard over 5 years ago

TI__Mastermind 44655 points

Hi Sushant,

The Kd pin is essentially an enable pin. With it being high, the device outputs are active and the function should be AND with how Ka, Kb, and Kc are configured.

0 kai klaas69 over 5 years ago

Guru 140200 points

Hi Sushant,

things become very simple when you have a look into the logic diagram in figure 2 of datasheet. It tells it all.

Kai

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CD4048B: Kd pin functionality