CD40194 -4-bit bidirectional universal shift register


CD40194 belongs to the 4000 Series CMOS Logic Family of Integrated Circuits (IC’s) constructed with N- and P-channel enhancement mode transistors. CD40194 has a 4-bit bidirectional universal shift register

CD40194 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.

CD40194 Features

  • High-Voltage Types (20V Rating)
  • Medium Speed fcL = 12MHz (Typ.) at VDD = 10V
  • Fully Static Operation
  • Synchronous Parallel or Serial Operation
  • Three-State Outputs (CD40104BMS)
  • Asynchronous Master Reset (CD40194BMS)
  • 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

CD40194 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

CD40194 Pinout Diagram

CD40194 Pin Description

Pin NoPin NameDescription
1RESET’Invert Reset Pin
2SHIFT RIGHT IN Shift Right Serial Input
3D0Data Input Pin 0
4D1 Data Input Pin 1
5D2 Data Input Pin 2
6D3 Data Input Pin 3
7SHIFT LEVEL INShift Level Serial Input
8VSSSupply Voltage
9SELECT 0Select Pin 0
10SELECT 1 Select Pin 1
11CLKClock Pin
12Q3Output 3
13Q2 Output 2
14Q1 Output 1
15Q0 Output 0
16VDDDrain Voltage

CD40194 Circuit


  • Arithmetic Unit Bus Registers
  • Serial/Parallel Conversions
  • General Purpose Register for Bus Organized Systems
  • General Purpose Registers

CD40194 Alternative Equivalent

Download CD40194-4-bit bidirectional universal shift register Datasheet from the link given below.