SN74LS156D

The SN74LS156D from Texas Instruments is a monolithic transistor-transistor-logic (TTL) integrated circuit featuring dual 1-line-to-4-line demultiplexers. Each section has individual strobes and common binary-address inputs, allowing for flexible decoding and demultiplexing of larger data words when cascaded. The device is housed in a 16-SOIC package, suitable for surface mounting.

This decoder/demultiplexer operates with a single supply voltage ranging from 4.75V to 5.25V. It supports applications such as dual 2-to-4-line decoding, dual 1-to-4-line demultiplexing, 3-to-8-line decoding, and 1-to-8-line demultiplexing. Input clamping diodes are included to simplify system design by minimizing transmission-line effects. The operating temperature range is from 0°C to 70°C.

Key features include individual strobes for activating or inhibiting each 4-bit section, simplifying cascading for decoding or demultiplexing larger words. The choice of open-collector outputs is a characteristic of the SN74LS156 series. The device is designed for applications requiring precise signal routing and decoding capabilities within a standard TTL logic family.