CD4518 IC is a BCD Up counter consisting of two individual synchronous Up counters. The IC is made from D-type flip-flops and has an interchangeable CLOCK and ENABLE pin. Upcounter IC has various applications and can be used for timing-related projects.
CD4518 Pinout Configuration
The CD4518 IC has 16 pins in total. The table below can be referred to understand the pin configuration of the IC.
| Pin Number | Pin Type | Pin Description |
| 1 | Clock A | Clock Input A |
| 2 | Enable A | Enable line A |
| 3 | Q1A | Counter A |
| 4 | Q2A | Counter A |
| 5 | Q3A | Counter A |
| 6 | Q4A | Counter A |
| 7 | Reset A | To Reset counter A |
| 8 | VSS | Ground |
| 9 | Clock B | Clock Input B |
| 10 | Enable B | Enable line B |
| 11 | Q1B | Counter B |
| 12 | Q2B | Counter B |
| 13 | Q3B | Counter B |
| 14 | Q4B | Counter B |
| 15 | Reset B | To Reset Counter B |
| 16 | VDD | Positive supply Input |
Technical Specifications
| Physical | |
| Case/Package | PDIP |
| Contact Plating | Gold |
| Mount | Through Hole |
| Number of Pins | 16 |
| Technical | |
| Direction | Unidirectional |
| Frequency | 8 MHz |
| Logic Function | Counter |
| Max Operating Temperature | 125 °C |
| Max Supply Voltage | 18 V |
| Min Operating Temperature | -55 °C |
| Min Supply Voltage | 3 V |
| Number of Bits | 4 |
| Number of Bits per Element | 4 |
| Number of Channels | 2 |
| Number of Circuits | 2 |
| Number of Elements | 2 |
| Number of Gates | 2 |
| Propagation Delay | 650 ns |
| Quiescent Current | 100 µA |
| Reset | Asynchronous |
| Sync/Async | Synchronous |
| Turn-On Delay Time | 560 ns |
Dual BCD Up Counter IC Working
The CD451 Up counter consists of two identical synchronous 4-stage counters. The image below shows the logic circuit of the BCD Up counter.
The counter stages are the D-type flip-flops having interchangeable CLOCK and ENABLE lines for incrementing the positive or negative-going transition, For the operation of a single unit, the ENABLE input is kept HIGH and the counter advances each positive-going transition of the CLOCK. The RESET lines clear out the HIGH levels.
Applications
Here are some of the applications of the CD4518 IC.
- Pulse counter
- Counter circuits
- Multistage Ripple Counting
- Timing related projects
Reviews
There are no reviews yet.