74LS393 Dual 4-bit Binary Counter
Package SOIC Series 74LS
74LS393 overview
The 74LS series of integrated circuits (ICs) was one of the most popular logic families of transistor-transistor logic (TTL) logic chips. 74LS series is a bipolar, low-power Schottky IC. 74LS393 monolithic circuits contain eight master-slave flip-flops and additional gating to implement two individual four-bit counters in a single package.
Datasheet
393.pdf
74LS393 features
- Eight Master-Slave Flip-Flops with Additional Gating for Two Four-Bit Counters
- Dual Version of the 74LS93
- Individual Clocks
- Direct Clear for Each Counter
- Speed up to 35MHz
74LS393 pinout
| Pin | Name | Description |
|---|---|---|
| 1 | CP' | Clock (Active LOW going edge) Input Of Counter 1 |
| 2 | MR | Master Reset (Active HIGH) Input of Counter 1 |
| 3 | Q0 | Output Bit 0 Of Counter 1 |
| 4 | Q1 | Output Bit 1 Of Counter 1 |
| 5 | Q2 | Output Bit 2 Of Counter 1 |
| 6 | Q3 | Output Bit 3 Of Counter 1 |
| 7 | GND | Ground |
| 8 | Q3' | Output Bit 3 Of Counter 2 |
| 9 | Q2' | Output Bit 2 Of Counter 2 |
| 10 | Q1' | Output Bit 1 Of Counter 2 |
| 11 | Q0' | Output Bit 0 Of Counter 2 |
| 12 | MR | Master Reset (Active HIGH) Input Of Counter 2 |
| 13 | CP' | Clock (Active LOW going edge) Input Of Counter 2 |
| 14 | VCC | Positive Supply |
74LS393 applications
- Frequency counters
- Digital clocks
- Analog to digital convertors
- With some changes in their design, counters can be used as frequency divider circuits
Comments 0
Leave a comment