DM74ALS245AMSAX

Overview

The DM74ALS245AMSAX is an octal bus transceiver from the Advanced Low-power Schottky (ALS) logic family, manufactured by Fairchild Semiconductor. It features eight bidirectional data paths with three-state outputs housed in a 20-pin SSOP package. The device operates within a supply voltage range of 4.5V to 5.5V and supports TTL logic levels. Direction control is managed via a DIR input, while a G enable input isolates the buses by placing outputs in a high-impedance state.

Feature Summary

• Advanced low power Schottky technology for improved switching performance
• Bidirectional data transmission controlled by direction input
• Three-state outputs allow effective bus isolation when disabled

Applications

• Memory systems
• Microprocessor systems
• Asynchronous bidirectional data buses

Procurement Notes

Verify the manufacturer origin carefully as this component was originally produced by Fairchild Semiconductor before its semiconductor business acquisition. Confirm that the specific suffix corresponds to the SSOP package variant rather than other packaging options like SOIC or DIP. Ensure the datasheet revision matches the required design specifications.

Selection Notes

Select this component when designing circuits requiring octal bidirectional buffering with low power dissipation. It serves as a functional replacement for standard 74LS series devices where faster switching speeds are necessary without excessive power consumption. Verify compatibility with existing system voltage levels and interface requirements.

Part Context

This part belongs to the widely used 74ALS logic family, known for balancing speed and power efficiency. The DM74ALS245A variant specifically provides octal configuration suitable for parallel data transfer applications. It maintains pin compatibility with earlier 74LS equivalents while offering superior AC performance characteristics.

Replacement Considerations

SN74ALS245AN