CD4034 8-Stage Bidirectional Bus Register


CD4034 belongs to 4000 Series CMOS Logic Family of Integrated Circuits (IC’s) constructed with N- and P-channel enhancement mode transistors. CD4034 has 8-Stage Bidirectional Bus Register

CD4034 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.

CD4034 Features

  • Bidirectional parallel data input
  • Parallel or serial inputs/parallel outputs
  • Asynchronous or synchronous parallel data loading
  • Parallel data-input enable on *”A” data lines (3-state output)
  • Data recirculation for register expansion
  • Multipackage register expansion
  • Buffered inputs and outputs
  • High speed – 12 MHz (typ.) at VpD 10V
  • Standard Symmetrical Output Characteristics
  • 100% Tested for Maximum Quiescent Current at 20V
  • 5V, 10V, and 15V Parametric Ratings

CD4034 Specifications

Absolute Maximum Ratings

  • DC Supply Voltage Range, (VDD): -0.5V to +18V (
  • Input Voltage Range, All Inputs: -0.5V to VDD +0.5V
  • Storage Temperature Range (TSTG): -65oC to +150oC
  • Lead Temperature (During Soldering): +260oC
    • At Distance 1/16 ± 1/32 Inch (1.59mm ± 0.79mm) from case for 10s Maximum

CD4034 Pinout Diagram

CD4034 Pin Description

Pin NoPin NameDescription
1B8Bus Register Output B8
2B7 Bus Register Output B7
3B6 Bus Register Output B6
4B5 Bus Register Output B5
5B4 Bus Register Output B4
6B3 Bus Register Output B3
7B2 Bus Register Output B2
8B1 Bus Register Output B1
9AEAn Enable Pin
10SERIAL DATASerial Data Input Pin
11A/BA-Bus to B-Bus
12VSSSupply Voltage
13P/SParallel/Serial Pin
15CLKClock Pin
16A1 Bus Register Output A1
17A2 Bus Register Output A2
18A3 Bus Register Output A3
19A4 Bus Register Output A4
20A5 Bus Register Output A5
21A6 Bus Register Output A6
22A7 Bus Register Output A7
23A8 Bus Register Output A8
24VDDDrain Voltage

CD4034 Circuit


  • Shift right/shift left with parallel loading
  • Address register
  • Buffer register
  • Bus system register with enable parallel lines at bus side
  • Double bus register system
  • Up-down Johnson or ring counter
  • Pseudo-random code generators
  • Sample and hold register (storage, counting, display)

CD4034 Alternative Equivalent

Download CD4034 8-Stage Bidirectional Bus Register Datasheet from the link given below.