CD4040 12-Stage Binary Ripple Counter

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CD4040 belongs to the CD4000 IC series. It is a 12-stage ripple carry binary counter. The counter advances one count on the negative transition of each clock pulse. The counters are reset to the zero states by a logical “1” at the reset input independent of the clock. CD4040 is always available in 16 – pin hermetically sealed dual inline IC package (IC). The output of the IC always comes in TTL, making it very easy to interface it with other TTL, CMOS, and NMOS devices. The IC has many additional features such as high noise immunity and i/O static protection through clamping diodes.

What is a Binary Ripple Counter?

A binary ripple counter generally uses a bistable multivibrator circuit so that cache input applied to the counter causes the count to advance or decrease. The Q and Q output terminals are always logically opposite. If the Q output is logical 1 (SET), the Q output then logical 0, If the Q output is logical 0 (REST), then the output is logical 1.A simple Binary ripple counter can easily be made by rigging at least two D – type flip flops.

CD4040 Key Features

Wide supply voltage range: 1.0V to 15V
High noise immunity: 0.45 VDD (typ.)
Low power TTL compatibility: Fan out of 2 driving 74L or 1 driving 74LS
Medium speed operation: 8 MHz typ. at VDD = 10V
Schmitt trigger clock input

CD4040 Pinout

Pin No	Pin Name	Description
1	Q12	Output 12 of ripple counter
2	Q6	Output 6 of ripple counter
3	Q5	Output 5 of ripple counter
4	Q7	Output 7 of ripple counter
5	Q4	Output 4 of ripple counter
6	Q3	Output 3 of ripple counter
7	Q2	Output 2 of ripple counter
8	VSS	Source supply
9	Q1	Output 1 of ripple counter
10	CLK 1	Clock signal Pin 1
11	R 1	Reset value Pin 1
12	Q9	Output 9 of ripple counter
13	Q8	Output 8 of ripple counter
14	Q10	Output 10 of ripple counter
15	Q11	Output 11 of ripple counter
16	VDD	Drain supply