Practical Electronics/IC/4011

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IC Family CMOS
Function Family Logic
Description Quad 2-Input NAND Gate
Pins 14
Functional Diagram
Basic TTL Counterpart 7400
Truth Table (One Gate)
A B   Q
0 0   1
0 1   1
1 0   1
1 1   0

The 4011 is a member of the 4000 Series CMOS range, and contains four independent NAND gates, each with two inputs. The pinout diagram, given on the right, is the standard two-input CMOS logic gate IC layout:

  • Pin 7 is the negative supply
  • Pin 14 is the positive supply
  • Pins 1&2, 5&6, 8&9, 12&13 are gate inputs
  • Pins 3, 4, 10, 11 are gate outputs

The truth table for one of the four gates is shown to the right. For more information about the NAND gate in general, see this module.

This chip is widely available, and usually comes in a DIL-14 or SOIC-14 package.

This chip is different in pinout to the TTL 7400, but can fulfill its function if the wiring is modified.