CD40181-4-bit 16-function arithmetic logic unit


CD40181 belongs to the 4000 Series CMOS Logic Family of Integrated Circuits (IC’s) constructed with N- and P-channel enhancement mode transistors. CD40181 has a 4-bit 16-function arithmetic logic unit

CD40181 has a supply voltage range of 5V to 20V, which is much higher than any contemporary logic family. It has buffered output which improves transfer characteristics by providing very high gain. All inputs are protected against static discharge with diodes to VDD and VSS.

CD40181 Features

  • High-Voltage Types (20V Rating)
  • Full Look Ahead Carry for Speed Operations on Long Words
  • Generates 16 Logic Functions of Two Boolean Variables
  • Generates 16 Arithmetic Functions of Two 4 Bit Binary Words
  • A = B comparator Output Available
  • Ripple Carry Input and Output Available
  • Standard Symmetrical Output Characteristics
  • 100% Tested for Maximum Quiescent Current at 20V
  • 5V, 10V, and 15V Parametric Ratings
  • Maximum Input Current of 1μA at 18V Over Full Package Temperature Range; 100nA at 18V and +25oC
  • Noise Margin (Over Full Package Temperature Range):
    • 1V at VDD = 5V
    • 2V at VDD = 10V
    • 2.5V at VDD = 15V

CD40181 Specifications

Absolute Maximum Ratings

  • DC Supply Voltage Range, (VDD): -0.5V to +20V (Voltage Referenced to VSS Terminals)
  • Input Voltage Range, All Inputs: -0.5V to VDD +0.5V
  • DC Input Current, Any One Input: ±10mA
  • Operating Temperature Range: -55oC to +125oC Package Types D, F, K, H
  • Storage Temperature Range (TSTG): -65oC to +150oC
  • Lead Temperature (During Soldering): +265oC
    • At Distance 1/16 ± 1/32 Inch (1.59mm ± 0.79mm) from case for 10s Maximum

CD40181 Pinout Diagram

CD40181 Pin Description

Pin NoPin NameDescription
1B0′Data Input Of Word Bit B0′
2A0′ Data Input Of Word Bit A0′
3S3Function Select Input S3
4S2 Function Select Input S2
5S1 Function Select Input S1
6S0 Function Select Input S0
8MMode Control
9F0′ Invert Output Function F0′
10F1′ Invert Output Function F1′
11F2′ Invert Output Function F2′
12VSSSupply Voltage
13F3′Invert Output Function F3′
14A=BCompare Output Pin
15P’ Look Ahead Carry Output
16Cn+4Ripple Carry Output
17G’Look Ahead Carry Output
18B3′ Data Input Of Word Bit B3′
19A3′ Data Input Of Word Bit A3′
20B2′ Data Input Of Word Bit B2′
21A2′ Data Input Of Word Bit A2′
22B1′ Data Input Of Word Bit B1′
23A1′ Data Input Of Word Bit A1′
24VDDDrain Voltage

CD40181 Circuit


  • Parallel Arithmetic Units
  • Process Controllers
  • Low Power Minicomputers

CD40181 Alternative Equivalent

Download CD40181-4-bit 16-function arithmetic logic unit Datasheet from the link given below.