DM74ALS245AMSA

Overview

The DM74ALS245AMSA is an octal 3-STATE bus transceiver manufactured by onsemi (formerly Fairchild Semiconductor). It utilizes an advanced oxide-isolated, ion-implanted Schottky TTL process and operates within a supply voltage range of 4.5V to 5.5V. The device features non-inverting logic outputs and PNP inputs designed to reduce input loading. It provides bidirectional data transmission between buses controlled by the DIR input, with both driver and receiver outputs independently controllable via the G enable input.

Feature Summary

• Advanced oxide-isolated, ion-implanted Schottky TTL process
• Glitch-free bus operation during power up and down
• Low output impedance suitable for driving terminated transmission lines
• Specified to interface with CMOS at VOH = VCC − 2V

Applications

• Memory systems
• Microprocessor systems
• Asynchronous bidirectional data buses

Procurement Notes

Verify that the ordering code includes the 'X' suffix if tape and reel packaging is required, as standard availability may differ. Confirm the package designation corresponds to MSA20 for the 20-Lead Shrink Small Outline Package. Ensure compatibility with the recommended operating free air temperature range of 0°C to +70°C for your specific application environment.

Selection Notes

Select this component when an octal bus transceiver with 3-STATE outputs is needed for memory or microprocessor interfaces. The ALS series offers improved switching response over LS counterparts. Verify that the system requires non-inverting logic and that the 4.5V to 5.5V supply voltage aligns with the design specifications.

Part Context

This part belongs to the 74ALS family of logic integrated circuits. The DM74ALS245A variant specifically provides octal configuration in various packages including SOIC, SOP, SSOP, and PDIP. The AMSAX designation indicates the SSOP package with tape and reel packaging options available upon request.

Replacement Considerations

SN74ALS245AN Texas Instruments SN74ALS245A-1N Texas Instruments