SN74LS155ANG4

Overview

The SN74LS155ANG4 is a dual 2-line to 4-line decoder/demultiplexer from the Texas Instruments 74LS series. It features two independent decoders with common address inputs and separate enable gates. The device operates on a single supply voltage ranging from 4.75 V to 5.25 V. It utilizes a 16-pin plastic DIP package for through-hole mounting. The component supports an operating temperature range from 0°C to 70°C.

Feature Summary

• Dual decoder architecture with shared address lines
• Independent gating enables for each decoder section
• Schottky process implementation for high-speed operation

Applications

• Data demultiplexing in digital systems
• Address decoding for memory selection
• Function generation logic circuits

Procurement Notes

Verify the specific suffix 'G4' against the manufacturer's current documentation to confirm RoHS compliance status and lead time requirements. Ensure the ordering part number matches the exact package style and pin configuration required by the design. Cross-reference the datasheet revision date to validate electrical characteristics before finalizing procurement specifications.

Selection Notes

Select this component when a design requires two independent 2-to-4 decoding functions within a single integrated circuit. The common address input simplifies wiring compared to using separate single decoders. Verify that the load capacitance and propagation delay specifications meet the system timing constraints for the intended application frequency.

Part Context

This part belongs to the standard 74LS logic family, representing a widely used TTL technology variant. The SN74LS155 provides a compact solution for routing data or selecting memory addresses. Its dual structure allows efficient use of board space while maintaining compatibility with standard 74-series logic levels and interfaces.

Replacement Considerations

Compatible substitutes include the SN74LS155AN and generic equivalents such as the 74LS155 from other manufacturers like Motorola or Fairchild. Verify pinout compatibility and electrical parameters before substitution.