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. 74LS01 Quad 2-input NAND Gate contains four independent 2-input NAND gates.
The open-collector outputs require pull-up resistors to perform correctly. They may be connected to other open-collector outputs to implement active-low wired-OR or active-high wired-AND functions. Open-collector devices are often used to generate higher VOH levels.
74LS01 Features
- Four Independent NAND Gates
- Standard Pin Configuration
- Also Available in SMD Type
- Operating Temperature to 70°C
- Standard TTL Switching Voltages
74LS01 Specification
| 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 |
74LS01 Pinout Diagram
74LS01 Pin Description
| Pin No | Pin Name | Description |
| 1 | C1 | NAND Gate 1 Output |
| 2 | A1 | NAND Gate 1 Input 1 |
| 3 | B1 | NAND Gate 1 Input 2 |
| 4 | C2 | NAND Gate 2 Output 2 |
| 5 | A2 | NAND Gate 2 Input 2 |
| 6 | B2 | NAND Gate 2 Input 2 |
| 7 | GND | Ground |
| 8 | A3 | NAND Gate 3 Input 3 |
| 9 | B3 | NAND Gate 3 Input 3 |
| 10 | C3 | NAND Gate 3 Output 3 |
| 11 | A4 | NAND Gate 4 Input 4 |
| 12 | B4 | NAND Gate 4 Input 4 |
| 13 | C4 | NAND Gate 4 Output 4 |
| 14 | VCC | Positive Supply |
74LS01 Circuit
Applications
- Burglar alarm
- Freezer warning buzzer
- A push-button lock
74LS01 Alternative Equivalent
74LS00, 74LS03, 74LS10
Download 74LS01 Quad 2-input NAND Gate (Open Collector) from the link given below.
