SN74ALS156DR

Signal Switches, Multiplexers, Decoders Overview

The SN74ALS156DR is a dual decoder/demultiplexer from Texas Instruments featuring open-collector outputs. It operates within a supply voltage range of 4.5 V to 5.5 V and supports data rates up to 30 MHz. The device utilizes Advanced Low-Power Schottky (ALS) logic technology for high-speed performance with reduced power consumption. Packaged in a 16-pin SOIC surface-mount format, it includes individual strobe inputs for each decoder section.

Signal Switches, Multiplexers, Decoders Feature Summary

• Dual independent decoding or demultiplexing functionality
• Open-collector output configuration
• High-speed operation with low power dissipation
• Input clamping diodes for system protection

Signal Switches, Multiplexers, Decoders Applications

• Dual 2-Line to 4-Line decoding
• Dual 1-Line to 4-Line demultiplexing
• Address decoding in memory systems

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific suffix 'DR' confirms the tape-and-reel packaging variant when sourcing. Confirm the open-collector output type matches the load requirements of the target circuit design. Ensure the operating temperature range aligns with the intended industrial environment.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component for applications requiring dual 1-of-4 selection with open-drain capabilities. It serves as a direct replacement for standard 74LS156 equivalents where lower power and higher speed are required. Consider the open-collector nature for necessary external pull-up resistor implementation.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the SN74ALS series of logic integrated circuits. It is functionally related to other decoders like the SN74ALS139 but offers dual sections instead of single. The ALS family provides a balance between the speed of Schottky logic and the power efficiency of low-power TTL standards.

Signal Switches, Multiplexers, Decoders Replacement Considerations

• SN74ALS156N
• SN74ALS156NSR

Signal Switches, Multiplexers, Decoders FAQ

What is the maximum operating frequency?

The device is characterized for operation at frequencies up to 30 MHz.

How are the outputs configured?

The outputs are open-collector, requiring external pull-up resistors for proper logic high levels.