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. 74LS151 selector/multiplexer contains full on-chip decoding to select the desired data source. The 74LS151 selects one-of-eight data sources. The 74LS151 has a strobe input which must be at a low logic level to enable these devices. A
74LS151 Features
- Selects One of Eight Data Lines Based on the Data Select Inputs
- Performs Parallel to Serial Conversion
- Low Power
- Operating Temperature up to 70°C
- Standard TTL Switching Voltages
74LS151 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 |
74LS151 Pinout Diagram
74LS151 Pin Description
| Pin No | Pin Name | Description |
| 1 | I3 | Data Input Pin 3 |
| 2 | I2 | Data Input Pin 2 |
| 3 | I1 | Data Input Pin 1 |
| 4 | I0 | Data Input Pin 0 |
| 5 | Z1 | Output 1 |
| 6 | Z2 | Output 2 |
| 7 | E | Enable Pin |
| 8 | GND | Ground |
| 9 | S2 | Data Select Pin 2 |
| 10 | S1 | Data Select Pin 1 |
| 11 | S0 | Data Select Pin 0 |
| 12 | I7 | Data Input Pin 7 |
| 13 | I6 | Data Input Pin 6 |
| 14 | I5 | Data Input Pin 5 |
| 15 | I4 | Data Input Pin 4 |
| 16 | VCC | Positive Supply |
74LS151 Circuit
Applications
- Multiple data can be transmitted using a single line
74LS151 Alternative Equivalent
74LS253, 74LS257, 74LS258
Download 74LS151 8-input Multiplexer Datasheet from the link given below.
