CD4025 Triple 3-input NOR Gate


CD4025 belongs to 4000 Series CMOS Logic Family of Integrated Circuits (IC’s) constructed with N- and P-channel enhancement mode transistors. CD4025 has a Triple 3-input NOR Gate

CD4025 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.

CD4025 Features

  • High Voltage Type (20V Rating)
  • 3-State Outputs
  • 100% Tested for 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 = 15

CD4025 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

CD4025 Pinout Diagram

CD4025 Pin Description

Pin NoPin NameDescription
1 A1 NOR Gate 1 Input 1
2 B1 NOR Gate 1 Input 2
3 A2 NOR Gate 2 Input 1
4B2 NOR Gate 2 Input 2
5C2 NOR Gate 2 Input 3
6Y1 NOR Gate 2 Output
7VSSSupply Voltage
8C1 NOR Gate 1 Input 3
9X1 NOR Gate 1 Output
10Z1 NOR Gate 3 Output
11A3 NOR Gate 3 Input 1
12B3 NOR Gate 3 Input 2
13C3 NOR Gate 3 Input 3
14VDDDrain Voltage

CD4025 Circuit


  • Digital Multiplexing
  • Shift Right/Shift Left Register
  • True/Complement Selection

CD4025 Alternative Equivalent

CD4001, CD4002

Download CD4025 Triple 3-input NOR Gate Datasheet from the link given below.