SN74ALS1245ADW

Overview

The SN74ALS1245ADW is an octal bus transceiver from the Texas Instruments ALS logic family, housed in a 20-pin SOIC 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 or surface-mount applications, it functions as a non-inverting buffer suitable for bidirectional data bus transmission.

Feature Summary

• Octal configuration providing eight independent bidirectional channels for efficient data bus management
• Three-state outputs enable direct connection to system buses without additional buffering requirements
• TTL-compatible input and output levels ensure seamless integration with standard digital logic systems

Applications

• Bidirectional data bus transmission in microprocessor-based systems
• I/O port expansion for memory and peripheral interfacing
• Buffering and driving high-capacitance loads on data lines

Procurement Notes

Verify the specific suffix 'DW' confirms the SOIC-20 surface-mount package variant rather than the PDIP-20 through-hole version. Confirm RoHS compliance status and check for End-of-Life notifications prior to finalizing procurement decisions. Ensure design compatibility with the specified 4.5 V to 5.5 V operating voltage range.

Selection Notes

Select this component when an octal, non-inverting bus transceiver with three-state outputs is required for bidirectional communication. It is appropriate for designs needing TTL compatibility and moderate speed performance. Consider the SOIC-20 package constraints for PCB layout and thermal management during selection.

Part Context

This part belongs to the SN74ALS1245A series of octal bus transceivers manufactured by Texas Instruments. It is part of the Advanced Low-power Schottky (ALS) logic family, which offers improved speed and power consumption characteristics compared to earlier standard TTL families. The device serves as a fundamental building block for digital data routing applications.

Replacement Considerations

Direct pin-to-pin replacements include the SN74ALS1245AN for through-hole packaging variants. Verify electrical specifications against other ALS-series bus transceivers if alternative packages are considered.