SN74ALS245ADWR

Overview

The SN74ALS245ADWR is an octal bus transceiver manufactured by Texas Instruments, belonging to the SN74ALS series. It features non-inverting logic with three-state outputs and is housed in a 20-SOIC package. The device operates within a supply voltage range of 4.5 V to 5.5 V. Key electrical parameters include a propagation delay of 16 ns, a low-level output current capability of 32 mA, and a high-level output current of -2.6 mA. It supports surface mount installation and functions reliably across an operating temperature range from 0°C to +70°C.

Feature Summary

• Octal configuration providing eight bidirectional data paths for efficient bus interfacing
• Three-state outputs enable direct connection to system buses without additional drivers
• Non-inverting logic maintains signal polarity during transmission

Applications

• Memory module data bus interfaces
• Microprocessor-based system data routing
• Control signal distribution networks

Procurement Notes

Verify the specific suffix 'A' against the manufacturer's official documentation to confirm pinout compatibility and electrical characteristics. Ensure the SOIC-20 package dimensions match the target PCB footprint requirements. Confirm RoHS compliance status through the latest datasheet revision notes before finalizing procurement specifications.

Selection Notes

Select this component when designing systems requiring high-speed data transfer with moderate drive strength. The ALS series offers improved speed over standard LS logic while maintaining compatible power consumption levels. Verify that the 32 mA sink current meets the load requirements of the connected destination devices on the shared bus architecture.

Part Context

This part belongs to the Texas Instruments SN74ALS family, which represents Advanced Low-power Schottky logic technology. The SN74ALS245 variant specifically serves as an octal bus transceiver, differing from latches or simple buffers by providing bidirectional data flow control via direction pins.

Replacement Considerations

SN74ALS245ANSR: Same functional logic and package type but utilizes NS (Narrow SOIC) packaging instead of standard SOIC.