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. 74LS93 monolithic counters contain four master-slave flip-flops and additional gating to provide a divide-by-two counter and a three-stage binary counter for which the count cycle length is divide-by-eight for the LS93.
74LS93 Features
- Contains a divide-by-two Section and a divide-by-eight Section
- Sections Can be Combined to form BCD, modulo-12 or modulo-16 Counters
- Low Power Dissipation
- Operating Temperature up to 70°C
- Standard TTL Switching Voltages
74LS93 Specifications
| Supply Voltage | 4.75 – 5.25Vdc |
| Maximum Clock Frequency | 40Mhz |
| Power Dissipation | 2mW/gate @100kHz |
| Minimum Output Current | 8mA |
| Propagation Delay | 10nS |
| Fan Out (TTL Loads) | 20 |
74LS93 Pinout Diagram
74LS93 Pin Description
| Pin No | Pin Name | Description |
| 1 | CP1′ | Clock (Active LOW going edge) Input 1 |
| 2 | MR1 | Master Reset (Clear) Input 1 |
| 3 | MR2 | Master Reset (Clear) Input 2 |
| 4 | NC | Not Connected |
| 5 | VCC | Positive Supply |
| 6 | NC | Not Connected |
| 7 | NC | Not Connected |
| 8 | Q2 | Output Bit 2 Of Counter |
| 9 | Q1 | Output Bit 1 Of Counter |
| 10 | GND | Ground Pin |
| 11 | Q3 | Output Bit 3 Of Counter |
| 12 | Q0 | Output Bit 0 Of Counter |
| 13 | NC | Not Connected |
| 14 | CP0′ | Clock (Active LOW going edge) Input 0 |
Applications
- Frequency counters
- Digital clocks
- Analog to digital converters
- In time measurement
74LS93 Alternative Equivalent
74LS92, 74LS161, 74LS162
Download the 74LS93 4-bit Binary Counter Datasheet from the link given below.
