SN74ALS156D

Overview

The SN74ALS156D is a dual 1-line to 4-line decoder/demultiplexer manufactured by Texas Instruments. It features open-collector outputs and individual strobes (G) for each channel. The device operates within a supply voltage range of 4.5 V to 5.5 V and has a propagation delay of 14 ns. It is housed in a SOIC-16 package and supports bipolar logic technology.

Feature Summary

• Dual 1-line to 4-line decoding capability
• Open-collector output structure
• Individual channel strobe control

Applications

• Data routing in digital systems
• Address decoding
• Signal distribution networks

Procurement Notes

Verify the specific suffix 'D' indicates the SOIC-16 surface-mount package configuration. Confirm RoHS compliance status through official Texas Instruments documentation prior to integration. Ensure operating conditions remain within the specified 0°C to +70°C temperature range for reliable performance.

Selection Notes

Select this component when dual independent demultiplexing with open-collector outputs is required. The ALS series offers improved speed over standard TTL while maintaining compatible pinouts. Verify that the load capacitance and voltage levels are suitable for open-collector driving requirements in the target circuit design.

Part Context

This part belongs to the SN74ALS logic family, which utilizes Advanced Low-power Schottky technology. It provides faster switching speeds compared to standard LS series devices. The SN74ALS156D is designed for high-speed digital applications requiring efficient signal routing and decoding functions.

Replacement Considerations

Check for direct pin-compatible alternatives within the SN74ALS or SN74LS families. Verify electrical characteristics such as propagation delay and output current capabilities match system requirements before substitution.