SN74AS645DWE4

Buffers, Drivers, Receivers, Transceivers Overview

The SN74AS645DWE4 is an octal bus transceiver with 3-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and supports bidirectional data transmission between two buses based on the DIR input level. The device features non-inverting logic and is housed in a 20-pin Small-Outline (DW) package. It is characterized for operation from 0°C to 70°C. Propagation delays are specified at a maximum of 9 ns, while output drive capabilities include high-level currents up to -15 mA and low-level currents up to 64 mA.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Bidirectional data transfer capability controlled by a dedicated direction input
• Three-state outputs allowing effective bus isolation when disabled
• True logic design supporting asynchronous communication between data buses

Buffers, Drivers, Receivers, Transceivers Applications

• Asynchronous two-way communication between data buses
• Bus-oriented memory and signal switching applications
• Clock drivers and bus interfaces requiring high-speed performance

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify that the component matches the specific AS logic family requirements rather than ALS variants. Confirm the SOIC-20 package designation aligns with board layout constraints. Ensure the operating temperature range meets system specifications as this catalog version is limited to commercial ranges. Cross-reference the datasheet revision to confirm electrical characteristics match the design intent.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component for designs requiring fast propagation delays and high drive strength compared to standard LS or ALS families. Consider the 3-state output feature for managing multiple devices on shared data lines. Evaluate power consumption differences against other logic families if thermal management is critical. Verify compatibility with existing control signals such as OE and DIR inputs.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SN74AS645 series of octal bus transceivers. It shares functional similarities with the SN74ALS645A but offers faster switching speeds characteristic of the AS family. The device is designed for high-density packaging solutions using the 20-pin SOIC form factor. It serves as a key interface element in systems requiring robust bidirectional data flow.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74ALS645ADW