Introduction

This page shows the pin layouts of the various ICs used on the website. I only use 4000 series CMOS ICs at the moment and so these are the ones that are listed. However, there are 7400 series equivalents for every IC listed and a really good reference book is the CMOS Cookbook.

CAUTION: The 4000 series ICs are based on MOSFET technology which makes them very sensitive to static. Handle the ICs carefully!

The number 1 pin is identified by either a dot placed near the pin or by a semi-circular cut out at one end of the chip as shown.

Combinational Logic

4001 Quad 2 input NOR gate

4011 Quad 2 input NAND gate

4069 Hex NOT gate

4071 Quad 2 input OR gate

4081 Quad 2 input AND gate

4093 Quad 2 Schmitt input NAND gate

40106 Hex Schmitt Inverter (NOT gate)

Synchronous Logic

4013 Dual D-type flip-flop

4017 Decade counter (÷10 counter)

4026 Decade counter (÷10 counter) with 7-segment driver

4043 Quad RS (NOR Logic) Bistable with common enable

4510 Divide by 10 BCD Up-Down Counter

4511 BCD 7-Segment Display Decoder and Latch

Other Useful ICs

555 Timer

741 Operational Amplifier