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. 74LS156 transistor-transistor-logic (TTL) circuits feature dual 1-line-to-4-line demultiplexers with individual strobes and common binary-address inputs in a single 16-pin package
74LS156 Features
- Contains Two Demultiplexers To Convert Serial Data to Parallel Output
- Open Collector Outputs for Driving Large Loads
- Low Power
- Operating Temperature up to 70°C
- Standard TTL Switching Voltages
74LS156 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 |
74LS156 Pinout Diagram
74LS156 Pin Description
| Pin No | Pin Name | Description |
| 1 | IC | Data Input 1C |
| 2 | 1G’ | Strobe Pin 1G’ |
| 3 | B | Select Input B |
| 4 | 1Y3 | Output 1Y3 |
| 5 | 1Y2 | Output 1Y2 |
| 6 | 1Y1 | Output 1Y1 |
| 7 | 1Y0 | Output 1Y0 |
| 8 | GND | Ground Pin |
| 9 | 2Y0 | Output 2Y0 |
| 10 | 2Y1 | Output 2Y1 |
| 11 | 2Y2 | Output 2Y2 |
| 12 | 2Y3 | Output 2Y3 |
| 13 | A | Select Input A |
| 14 | 2G’ | Strobe Pin 2G’ |
| 15 | 2C’ | Data Input 2C |
| 16 | VCC | Positive Supply |
74LS156 Circuit
Applications
- Connect a single source to multiple destinations.
74LS156 Alternative Equivalent
74LS155
Download 74LS156 Dual 2/4 Demultiplexer (Open Collector) Datasheet from the link given below.
