4026 - Decade Counter (7-segment)

The 4026 is a CMOS decade counter with a 7-segment display driver, designed to count from 0 to 9 and directly drive LED displays. It includes a counter, decoder, and a display-enable pin, simplifying numeric display tasks. Ideal for digital clocks and counters, it operates on 3V–15V, with low power usage and features like carry-out for cascading multiple ICs for higher digit counts.

CD4026BE Decade Counter (7-segment) in PDIP-16 package
Fig.: CD4026BE Decade Counter (7-segment) in PDIP-16 package

Specifications/Features

Counter Type Decade (0–9)
Operating Voltage 3V to 15V
Output Current 1 mA
7-Segment Output Type Common Cathode
Temperature Range -55°C to +125°C

📄 CD4026B datasheet (514 kB)

Connections

Terminal diagram of the 4026
Fig.: Terminal diagram of the 4026
Pin No Pin Name Description
1 Clock (CLK) The counting happens when this clock pulse goes HIGH
2 Clock Inhibit (INH) Connected to the Ground (LOW) of the circuit, to enable clock pin
3 Enable Input (DEI) This pin is connect to +5V (HIGH) to enable the output pins (Out A to Out G)
4 Enable Output (DEO) This is an output which always stays HIGH (if more than one 4026 is used)
5 Divide by 10 (CO) Carry out: it produces a pulse after counting till 9 (if more than one 4026 is used)
6, 7, 9, 10, 11, 12, 13 Out A-G These are the decoded output pins which should connected to 7-Segment display.
8 GND Ground
14 Ungated "C" segment (UCS) Output pin which will be used when division is required.
15 Reset This input pin when made HIGH (+5V) will reset the count to 0.
16 VCC Supply Voltage
Last edited by Christian Grieger on 2025-05-10
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