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Decade Counter/Divider IC - CD4026
Decade Counter/Divider IC - CD4026
The CD4x Series CD4026 consists of a 5-stage Johnson decade counter and an output decoder that 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 CD4026 include DISPLAY ENABLE input and DISPLAY ENABLE and UNGATED "C-SEGMENT" outputs.
A high RESET signal clears the decade counter to its zero counts. 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 CD4026 outputs go high only when the DISPLAY ENABLE IN is high.
The CD4026 series type is 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).
Pinout:
Applications:
- Decade counting 7-segment decimal display
- Frequency division 7-segment decimal displays
- Clocks, watches, timers (e.g. ÷60, ÷60, ÷ 12 counter/display)
- Counter/display driver for meter applications
Package Includes:
Selected qty of IC - CD4026
Specifications:
| Part number | CD4026B |
| Technology Family | CD4000 |
| VCC (Min) (V) | 3 |
| VCC (Max) (V) | 18 |
| Bits (#) | 7 |
| Voltage (Nom) (V) | 5, 10, 15 |
| F @ nom voltage (Max) (MHz) | 8 |
| ICC @ nom voltage (Max) (mA) | 0.03 |
| tpd @ nom Voltage (Max) (ns) | 250 |
| IOL (Max) (mA) | 1.5 |
| IOH (Max) (mA) | -1.5 |
| Function | Counter |
| Type | Decade |
| Rating | See Data Sheet |
| Operating temperature range (C) | -55 to 125 |
| Package Group | PDIP|16 |
ADDITIONAL RESOURCES
1.What is CD4026?
- CD4026 is a Johnson counter integrated circuit that is commonly used in digital displays. It has a five-stage Johnson decade counter and a decoder that converts the Johnson code to a seven-segment decoded output. Simply put, it will convert the input into a numeric display that can be viewed on a 7 segment display or with LED.
2.What is the input voltage of CD4026?
- The CD4026 has a supply voltage range of 5V to 20V, which is much higher than any other modern logic family. It has a buffered output that improves transfer characteristics by providing a very high gain. All inputs are protected against static discharge by diodes connected to VDD and VSS.
