CD4026 7-segment Counter IC
The IC CD4026 is an IC which can perform the function of both a counter as well a 7-segment Driver. One single IC can be used to count form zero (0) to nine (9) directly on a Common Cathode type 7-segment display. The count can be increased by simply giving a high clock pulse; also more than one digit (0-9) can be created by cascading more than one CD4026 IC. So if you have a 7-segment (CC) display on which you have to display numbers that are being counted based on some condition then this IC will be a perfect choice.
Features:
Counter for 7-Segment display
Can drive a common cathode 7-Segment display directly
Easy to interface with timer or micron rollers (TTL compatible)
Can be easily cascaded with more IC to display higher range of number
Maximum Clock Frequency: 6Mhz
Available in 16-pin PDIP, GDIP, PDSO packages
CD4026 Pin Configuration
Pin Number
Pin Name
Description
1
Clock (CLK)
The counting happens when this clock pulse goes high , this pin is normally connected to 555 timer or other uC to produce a pulse
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, this pin will be only if more than one CD4026 IC is used (cascaded)
5
Divide by 10 (CO)
This is the carry over output pin; it produces a pulse after counting till 9. This pin will be only if more than one CD4026 IC is used (cascaded)
6,7,9,10,11,12,13
Out A,B,C,D,E, F,G
These are the decoded output pins which should connected to 7-Segment display.
8
Ground
The ground pin should be connected to ground of circuit
14
Not 2 out (UCS)
This is Ungated C segment pin. This is an output pin which will be rarely used when division is required.
15
Reset
This input pin when made high (+5V) will reset the count to 0.
16
Vcc
This pin powers the IC, typically +5V is used.
Applications
Used in 7-segment counter projects
Can be used to count people or objects crossing a point
Has capability to display a wide range of numbers from 0 – 999
Used in project where Microcontrollers should be avoided
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