SN74LVC245APWT

Buffers, Drivers, Receivers, Transceivers Overview

The SN74LVC245APWT is an octal bus transceiver with three-state outputs manufactured by Texas Instruments. It operates from a supply voltage of 1.65 V to 3.6 V and features inputs that accept voltages up to 5.5 V, supporting mixed-mode signal operation. The device provides a maximum propagation delay of 6.3 ns at 3.3 V and includes Ioff circuitry for partial-power-down mode support. It is housed in a 20-pin TSSOP package and functions within a temperature range of -40°C to 125°C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Supports asynchronous communication between data buses with configurable direction control
• Enables mixed-mode signal operation allowing 5-V input/output voltage compatibility with 3.3-V VCC
• Includes Ioff circuitry to prevent damaging current backflow during power-down states

Buffers, Drivers, Receivers, Transceivers Applications

• Cable modem termination systems
• Servers
• LED displays
• Network switches
• I/O expanders

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix 'T' corresponds to the small tape-and-reel packaging configuration as defined in the manufacturer's Package Option Addendum. Confirm that the component meets RoHS compliance standards and matches the specified thermal resistance metrics for the TSSOP-20 package variant before finalizing procurement specifications.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when designing systems requiring bidirectional data transfer between buses operating at different voltage levels. Ensure the design accommodates the 1.65-V to 3.6-V supply range and utilizes the 5.5-V tolerant inputs for down-translation applications. Verify that the required propagation delay and output drive capabilities align with the system timing constraints.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SN74LVC245A family of octal bus transceivers. It shares functional characteristics with variants such as SN74LVC245APW and SN74LVC245APWR, differing primarily in packaging quantity and reel specifications. The device is designed for high-drive CMOS applications where PCB trace length or output drive requirements are critical factors.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74LVC245APWE4

Buffers, Drivers, Receivers, Transceivers FAQ

How does the device handle partial-power-down scenarios?

The device incorporates Ioff circuitry that disables the outputs when powered down, preventing damaging current backflow through the device.

What is the function of the DIR input pin?

The DIR input controls the direction of data flow; a high logic level propagates data from the A bus to the B bus, while a low level propagates data from the B bus to the A bus.