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IC Pinouts / CD4011

CD4011 Pinout

CD4011 Quad NAND Gate · CMOS quad 2-input NAND gate, supply 3–18V, a "universal gate".

DIP-14 Logic 14 pins No backend · 100% client-side
1A 1
1B 2
1Y 3
2Y 4
2A 5
2B 6
VSS(GND) 7
CD4011 DIP-14
14 VDD
13 4B
12 4A
11 4Y
10 3Y
9 3B
8 3A
PowerGNDInputOutputI/OControl
PinNameTypeFunction
1 1A Input Gate 1 input A
2 1B Input Gate 1 input B
3 1Y Output Gate 1 output = NAND(1A,1B)
4 2Y Output Gate 2 output
5 2A Input Gate 2 input A
6 2B Input Gate 2 input B
7 VSS · GND GND Ground
8 3A Input Gate 3 input A
9 3B Input Gate 3 input B
10 3Y Output Gate 3 output
11 4Y Output Gate 4 output
12 4A Input Gate 4 input A
13 4B Input Gate 4 input B
14 VDD Power Supply + (3–18V)
How to · reading it

How to read the CD4011 pinout

  1. 01

    Find pin 1

    One end of the chip has a half-circle notch or a dot; with the notch facing up, the top-left pin is pin 1.

  2. 02

    Count counter-clockwise

    Count counter-clockwise from pin 1: go down the left side first, then up the right side from the bottom.

  3. 03

    Check the table below

    Look up each pin's function by number in the table below; power/ground are color-coded, and alternate-function signals are in parentheses.

FAQ

Frequently asked questions

Is the CD4011 the same as the 74HC00?

Both are quad NAND gates, but the CD4011 is 4000-series CMOS (supply 3–18V, slow) and the 74HC00 is high-speed CMOS (2–6V, much faster). Same pin layout.

How do I handle unused gates/inputs?

CMOS inputs must never float: tie unused inputs to VDD or VSS, otherwise they tend to oscillate, draw current, and produce undefined outputs.

Why is it called a "universal gate"?

Using only NAND gates you can build any logic such as AND/OR/NOT, hence it is called a universal (general-purpose) gate.

Data source

Pinout data comes from TI CD4011B datasheet (standard DIP-14 numbering). Refer to the actual device datasheet as authoritative for the pinout.

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