The CD4026 is an integrated circuit that combines a 5-stage Johnson decade counter with an output decoder. It converts Johnson codes into a 7-segment display-compatible output, making it ideal for driving numerical displays. The IC is designed for applications that require low power consumption and a minimal component count.

Key Features

• Input/Output Functionality:

  • Inputs: CLOCK, RESET, and CLOCK INHIBIT.
  • Outputs: CARRY OUT and seven decoded outputs (a, b, c, d, e, f, g).
  • Additional inputs/outputs: DISPLAY ENABLE input, DISPLAY ENABLE output, and an ungated "C-SEGMENT" output.

• Reset Functionality:
  A high RESET signal clears the counter to zero.

• Clock Functionality:

  • Advances the counter with a positive clock transition when CLOCK INHIBIT is low.
  • Disables counter advancement when CLOCK INHIBIT is high.
  • CLOCK INHIBIT can also function as a negative-edge clock if the clock line is held high.

• Carry-Out Signal:
  The CARRY OUT (Cout) signal completes one cycle every ten clock cycles, allowing cascading of multiple ICs in multi-decade counting chains.

• 7-Segment Display Control:

  • The decoded outputs (a, b, c, d, e, f, g) illuminate the corresponding segments of a 7-segment display, representing decimal digits 0 to 9.
  • Outputs are active only when the DISPLAY ENABLE input is high.

• Anti-Lock Gating:
  Ensures a proper counting sequence in the Johnson counter.

• Package Options:
  Available in 16-lead dual-in-line plastic (E suffix), small-outline (NSR suffix), and thin-shrink small-outline (PW and PWR suffix) packages.

Specifications

• Part Number: CD4026BE
• Manufacturer: Texas Instruments
• Function: Decade Counter/Divider
• Product Type: Counter IC
• Counter Type: Decade
• Number of Bits: 7
• Counting Sequence: Up
• Operating Voltage Range: 3 V to 18 V
• Output Current: ±1.5 mA
• Operating Temperature Range: -55°C to +125°C
• Mounting Style: Through Hole
• Package/Case: PDIP-16
• Weight: 1 g

Applications

• 7-Segment Counter Projects:
  Used for driving 7-segment displays in various counting applications.
• People/Object Counting:
  Ideal for systems counting individuals or objects crossing a specific point.
• Wide-Range Display:
  Capable of counting and displaying numbers from 0 to 999 when cascaded.
• Microcontroller-Free Projects:
  Suitable for designs where microcontrollers are not desired or needed.

Package Includes

• 1 x CD4026 Decade Counter/Divider IC (DIP-16 Package)