Part Number: 4017
Function: Decade Counter/Divider
Package: 16 Pin Type
The 4017 is a 5-stage divide-by-10 Johnson counter with 10 decoded outputs and a carry out bit. The CD4022BC is a 4-stage divide-by-8 Johnson counter with 8 decoded outputs and a carry-out bit.
A decade counter/divider is an electronic circuit or component that counts or divides an input signal by a factor of 10 for each clock pulse received. It is commonly used in digital electronics for various applications, including frequency division, timekeeping, and controlling sequential operations.
These counters are cleared to their zero count by a logical “1” on their reset line. These counters are advanced on the positive edge of the clock signal when the clock enable signal is in the logical “0” state.
1. Counting or Division: The primary function of a decade counter/divider is to count the number of input clock pulses it receives and divide the frequency of the input signal by 10 for each clock pulse. This results in an output signal with a frequency that is one-tenth of the input frequency.
2. BCD (Binary Coded Decimal) Output: In many decade counters, the output is in BCD format. BCD is a binary representation of a decimal number, where each digit of the decimal number is represented by a 4-bit binary code. A decade counter’s BCD output typically consists of four output lines (D0, D1, D2, and D3) representing the ones, tens, hundreds, and thousands digits, respectively.
1. Wide supply voltage range: 3.0V to 15V
2. High noise immunity: 0.45 VDD (typ.)
3. Low power Fan out of 2 driving 74L, TTL compatibility: or 1 driving 74LS
4. Medium speed operation: 5.0 MHz (typ.) with 10V VDD
5. Low power: 10 µW (typ.)
6. Fully static operation
3. Medical electronics
4. Alarm systems
5. Industrial electronics
6. Remote metering