Complete Guide to Logic Gates
Divide-by-12 counter (SN74LS92)
The SN74LS92 is a "Divide-By-12" counter (4 bits). Similar to the 74LS90, but counting resets at 12. It also has internal flip-flops and ports for cascading with other counters. Widely used in frequency dividers and modular counters.
Datasheet and Pin Diagram
The datasheet provides crucial technical information about this integrated circuit, including pin diagram, electrical characteristics and package information.
The SN74LS92 divide-by-12 counter is a fundamental component in digital electronics. Its configuration is 4 binary outputs, 2 clock inputs. Its operation is based on the logic function .
Applications
- Frequency dividers
- Modular counters
- Timing systems
- Pattern generators
- Hour counters (12h clock)
This integrated circuit is used in various digital logic applications and embedded systems.
Truth Table
The truth table illustrates the output of the SN74LS92 divide-by-12 counter for each possible combination of its logic inputs.
| Count | QD | QC | QB | QA |
|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 |
| 1 | 0 | 0 | 0 | 1 |
| 2 | 0 | 0 | 1 | 0 |
| 3 | 0 | 0 | 1 | 1 |
| 4 | 0 | 1 | 0 | 0 |
| 5 | 0 | 1 | 0 | 1 |
| 6 | 0 | 1 | 1 | 0 |
| 7 | 0 | 1 | 1 | 1 |
| 8 | 1 | 0 | 0 | 0 |
| 9 | 1 | 0 | 0 | 1 |
| 10 | 1 | 0 | 1 | 0 |
| 11 | 1 | 0 | 1 | 1 |
Technical Specifications
General Information
mod-12 Counter
4 binary outputs, 2 clock inputs
Electrical Characteristics
4.75V - 5.25V
20mA
15ns typ
0掳C to 70掳C
Package Information
DIP-14
0.1" (2.54mm)
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Additional Information
To deepen your understanding of the SN74LS92 divide-by-12 counter, you can consult additional resources on Boolean algebra and digital circuit design. Experimenting with circuit simulators or building physical circuits will help you consolidate your understanding.