4026 Decade Counter Descriptive Essay

CD4026B and CD4033B each consist of a 5-stage Johnson decade counter and an output decoder which converts the Johnson code to a 7-segment decoded output for driving one stage in a numerical display.

These devices are particularly advantageous in display applications where low power dissipation and /or low package count are important.

Inputs common to both types are CLOCK, RESET, & CLOCK INHIBIT; common outputs are CARRY OUT and the seven decoded outputs (a, b, c, d, e, f, g). Additional inputs and outputs for the CD4026B include DISPLAY ENABLE input and DISPLAY ENABLE and UNGATED "C-SEGMENT" outputs. Signals peculiar to the CD4033B are RIPPLE-BLANKING INPUT AND LAMP TEST INPUT and a RIPPLE-BLANKING OUTPUT.

A high RESET signal clears the decade counter to its zero count. The counter is advanced one count at the positive clock signal transition if the CLOCK INHIBIT signal is low. Counter advancement via the clock line is inhibited when the CLOCK INHIBIT signal is high. The CLOCK INHIBIT signal can be used as a negative-edge clock if the clock line is held high. Antilock gating is provided on the JOHNSON counter, thus assuring proper counting sequence. The CARRY-OUT (Cout) signal completes one cycle every ten CLOCK INPUT cycles and is used to clock the succeeding decade directly in a multi-decade counting chain. The seven decoded outputs (a, b, c, d, e, f, g) illuminate the proper segments in a seven segment display device used for representing the decimal numbers 0 to 9. The 7-segment outputs go high on selection in the CD4033B; in the CD4026B these outputs go high only when the DISPLAY ENABLE IN is high.

The CD4026B- and CD4033B-series types are supplied in 16-lead dual-in-line plastic packages (E suffix), 16-lead small-outline packages (NSR suffix), and 16-lead thin shrink small-outline packages (PW and PWR suffixes).

Our website uses cookies to provide you with a better service while searching or placing an order and for analytical purposes.

Counters & Shift Registers

A Shift Register is a sequential logic device made up of a cascade of flip-flops, through which a sequence of bits are ’shifted’. These devices are commonly used to convert between serial and parallel interfaces.

How it works – basic example

In a Shift Register the output of each flip-flop is connected to the input of the next flip-flop in the cascade. With each cycle of the connected clock, the bits are ’shifted’ down the cascade by one flip-flop.

  • All Products
    • Electronics Components, Power & Connectors
    • Batteries
    • Connectors
    • Displays & Optoelectronics
      Displays & Optoelectronics
    • Passive Components
    • PCB Prototyping
    • Power Supplies & Transformers
      Power Supplies & Transformers
    • Semiconductors
    • Electrical, Automation & Cables
    • Automation & Control Gear
      Automation & Control Gear
    • Cables & Wires
    • Enclosures, Storage & Material Handling
      Enclosures, Storage & Material Handling
    • Fuses, Sockets & Circuit Breakers
      Fuses, Sockets & Circuit Breakers
    • HVAC, Fans & Thermal Management
      HVAC, Fans & Thermal Management
    • Lighting
    • Relays
    • Robots & Robot Parts
    • Switches
    • Mechanical Products & Tools
    • Abrasives & Engineering Materials
      Abrasives & Engineering Materials
    • Adhesives, Sealants & Tapes
      Adhesives, Sealants & Tapes
    • Facilities Cleaning & Maintenance
      Facilities Cleaning & Maintenance
    • Fasteners & Fixings
    • Plumbing & Pipeline
    • Pneumatics, Hydraulics & Power Transmission
      Pneumatics, Hydraulics & Power Transmission
    • Tools
    • IT, Test & Safety Equipment
    • Computing & Peripherals
      Computing & Peripherals
    • Office Supplies
    • Safety, Security, ESD Control & Clean Room
      Safety, Security, ESD Control & Clean Room
    • Test & Measurement
  • Our Brands
  • New Products
  • My Account
  • Our Services

0 comments

Leave a Reply

Your email address will not be published. Required fields are marked *