SN74LS245DW

Buffers, Drivers, Receivers, Transceivers Overview

The SN74LS245DW is an octal bus transceiver from the LS TTL series, manufactured by onsemi. It features true outputs and a 3-state capability within a 20-pin SOP plastic package. The device supports bidirectional data communication between two buses, controlled by a direction input (DIR) and an enable input (E). Key electrical characteristics include a maximum low-level output current of 24 mA and a typical propagation delay of 12 ns at 5 V supply voltage.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Provides asynchronous two-way data communication across eight lines
• Direction control input manages transmission flow between Bus A and Bus B
• Enable input isolates buses when deactivated
• Hysteresis inputs enhance noise immunity

Buffers, Drivers, Receivers, Transceivers Applications

• Asynchronous data bus communication systems
• Building automation networks
• Factory automation and control interfaces
• Electronic sales point terminals

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify that the specific order contains the 'onsemi' manufacturer designation rather than Texas Instruments, as this part number is shared across multiple vendors. Confirm the package type matches the required SOP-20 form factor. Ensure the component meets the necessary RoHS compliance standards for your assembly process. Cross-reference the date code to ensure availability of fresh stock.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when designing circuits requiring robust TTL-compatible octal bus interfacing with moderate speed requirements. The LS series offers a balance of power consumption and drive strength suitable for general-purpose digital logic applications. Consider the 3-state output feature for efficient bus sharing in multi-master environments without additional gating logic.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the standard 74LS logic family, widely used in legacy and industrial digital systems. It serves as a fundamental interface component for expanding I/O capabilities or connecting microprocessors to peripheral devices. The octal configuration allows simultaneous handling of parallel data words, simplifying board layout compared to single-bit transceivers.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74LS245N: Identical functional specification available in DIP-20 package for through-hole mounting. SN74LS245DWR: Same SOIC-20 package but supplied in tape-and-reel format for automated assembly. SN54LS245: Military-grade version with extended temperature range and higher reliability specifications.