74LS156 Dual 2 To 4 Line Demultiplexer (Open Collector)
Series 74LS
74LS156 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. 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
Key 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
Datasheet
156.pdf
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 pinout
| 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 applications
- Connect a single source to multiple destinations.
More about 74LS156
74LS156 Alternative Equivalent
74LS155
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