SN74ALS1245AN

Overview

The SN74ALS1245AN is an octal bus transceiver from the Texas Instruments ALS logic family, housed in a 20-pin PDIP package. It features three-state outputs and operates within a supply voltage range of 4.5 V to 5.5 V. The device supports TTL input and output levels with a propagation delay of 13 ns. It provides a low-level output current of 16 mA and a high-level output current of -15 mA. Designed for through-hole mounting, it functions within a temperature range of 0°C to +70°C.

Feature Summary

• Octal configuration providing eight bidirectional data channels
• Three-state outputs enabling direct system bus connection
• TTL-compatible input and output voltage levels

Applications

• High-speed data acquisition systems
• Memory mapping applications
• Control logic implementations

Procurement Notes

Verify the specific manufacturer part number against official datasheets to ensure compatibility with design requirements. Confirm that the PDIP-20 package and through-hole installation method align with the target PCB layout. Check RoHS compliance status and operating temperature specifications to validate suitability for the intended environmental conditions before finalizing procurement decisions.

Selection Notes

Select this component when an octal bus transceiver with ALS speed characteristics is required. Ensure the application utilizes a 5 V power supply within the specified tolerance. Verify that the 13 ns propagation delay meets the system timing constraints. Consider the 16 mA sink and 15 mA source drive capabilities for load matching requirements.

Part Context

This component belongs to the SN74ALS1245A series of standard transceivers manufactured by Texas Instruments. It is categorized under logic ICs and specifically designed as a bus transceiver. The device is part of the broader 74ALS logic family, offering performance improvements over earlier standards while maintaining pinout compatibility with similar functional devices.

Replacement Considerations

Consult official substitution guides for verified equivalents. Cross-reference pinouts and electrical parameters carefully when considering alternative manufacturers or updated series revisions.