CD4018 is a part of the CD4XXX IC series. It is a presettab;e divide-by-N Counter, made by using the complementary MOS (CMOS) technology. The IC always comes in a 16-pin hermetically selaed dual in line IC packaging. CD4018 has a wide variety of workable volatges, a wide variety of working conditions and can be interfaced directly with other TTL, CMOS, and NMOS devices.
What is Divide-by-N Counter?
A Divide by N counter refers to a generic counter that divides the input clock frequency by a factor of N ie; in the case of a divide by 2 counter (N=2), in case you cascade four flip-flops, then the output of every stage is divided by 2, if you are taking the output from the 4th flip-flop, then its output clock frequency is equal to 16 (2^4). A Divide by N counter, also known as a frequency divider counter, could be constructed using a single D-type flip-flop.
CD4018 Key Features
- Fully static operation
- 100% tested for quiescent current at 20V
- Medium speed operation ….. 10 MHz (typ) at VDD-VSS =10V
- Maximum input current 1microAmpere at 18V over full package temperature range; 100 nA at 18V and 25 C
CD4018 Pinout
| Pin No | Pin Name | Description |
|---|---|---|
| 1 | D1 | data signal 1 |
| 2 | JAM 1 | jam input signal 1 |
| 3 | JAM 2 | jam input signal 2 |
| 4 | Q2′ | complement output signal 2 |
| 5 | Q1′ | complement output signal 1 |
| 6 | Q3′ | complement output signal 3 |
| 7 | JAM 3 | jam input signal 3 |
| 8 | VSS | source supply |
| 9 | JAM 4 | jam input signal 4 |
| 10 | PRE-ENB | preset enable value |
| 11 | Q4′ | complement output signal 4 |
| 12 | JAM 5 | jam input signal 5 |
| 13 | Q5′ | complement output signal 5 |
| 14 | CLK | clock signal |
| 15 | R | reset value |
| 16 | VDD | Drain supply |
Application
- Fixed and programmable divide by 10, 9, 8, 7, 6, 5, 4, 3, 2 counters
- Fixed and programmable counters greater than 10
- Programmable decade counters
- Frequency division
- Counter control /Timers
CD4018 Datasheet
You can download the datasheet for CD4018 Presettable Divide by N Counter from the link given below:
See Also: CD4086 2-Input AND-OR-INVERT Gate – Datasheet | CD4007 Dual Complementary Pair with Inverter – Datasheet | CD4528 Dual Monostable Multivibrator – Datasheet
