DM74ALS5245WM

Overview

The DM74ALS5245WM is an octal bus transceiver from the Advanced Low-Power Schottky (ALS) logic family, manufactured by onsemi. It features a 20-Lead Small Outline Integrated Circuit (SOIC) package with JEDEC MS-013 dimensions. The device operates within a supply voltage range of 4.5V to 5.5V and supports a free-air operating temperature range of 0°C to +70°C. Electrical characteristics include a maximum propagation delay of 10 ns, a low-level output current of 24 mA, and a high-level output current of -15 mA.

Feature Summary

• Incorporates input hysteresis to provide improved noise rejection capabilities
• Utilizes PNP inputs designed to reduce input loading on driving circuits
• Features advanced oxide-isolated, ion-implanted Schottky TTL process technology
• Switching specifications are guaranteed across the full temperature and supply voltage range

Applications

• Asynchronous two-way communication between data buses
• Memory systems utilizing bidirectional data paths
• Microprocessor systems requiring bus isolation and direction control

Procurement Notes

Verify that the component matches the specific SOIC-20 package configuration designated by the WM suffix. Confirm the manufacturer origin as Fairchild Semiconductor or its successor entity, onsemi, to ensure compatibility with original design specifications. Check for RoHS compliance status if required by assembly standards.

Selection Notes

Select this component when designing systems requiring octal bidirectional data transfer with defined direction control. The ALS series offers a balance of speed and power consumption suitable for general-purpose digital logic applications. Ensure the system environment remains within the specified 0°C to +70°C operating temperature range for guaranteed performance.

Part Context

This device belongs to the 74ALS logic family, known for improved switching speeds compared to standard LS logic while maintaining lower power dissipation. The octal configuration allows for parallel data transmission across eight bits simultaneously. The inclusion of hysteresis distinguishes it from standard variants, enhancing signal integrity in electrically noisy environments.

Replacement Considerations

Direct substitutes include other octal 3-state bus transceivers from the 74ALS family. Verify pinout compatibility and electrical parameters such as propagation delay and output drive current before implementation.