SN74LVC245APW

Buffers, Drivers, Receivers, Transceivers Overview

The SN74LVC245APW is an octal bus transceiver designed for 1.65-V to 3.6-V VCC operation, utilizing TSSOP-20 packaging. It supports asynchronous communication between data buses with a maximum propagation delay of 6.3 ns at 3.3 V. The device features three-state outputs and inputs that accept voltages up to 5.5 V, enabling mixed-mode signal operation. It includes Ioff circuitry to support live insertion and partial-power-down modes, preventing back drive currents. Latch-up performance exceeds 250 mA per JESD 17.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Supports mixed-mode signal operation on all ports, allowing 5-V input/output voltage compatibility with 3.3-V VCC.
• Ioff circuitry disables outputs to prevent damaging current backflow during power-down or live insertion events.
• Inputs are overvoltage tolerant, accepting voltages up to 5.5 V regardless of the supply voltage level.

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 package type matches the required footprint, as the PW suffix indicates a TSSOP package. Confirm the operating temperature range requirements align with the specified -40°C to 125°C rating. Ensure design compliance with ESD protection standards, noting the device withstands 2000 V via the human-body model. Check for specific RoHS compliance markings if environmental regulations apply to the final assembly.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when interfacing buses requiring 8-bit wide data transfer within the 1.65-V to 3.6-V supply range. It is suitable for applications needing down-voltage translation from 5-V logic sources. Consider the TSSOP-20 package constraints for PCB layout. Verify that the output drive capabilities meet the load requirements without exceeding absolute maximum ratings.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the Texas Instruments SN74LVC245A family of octal bus transceivers. It is part of the broader 74LVC logic series, optimized for low-voltage digital applications. The product line offers various package options including SSOP, SOIC, and VQFN, providing flexibility for different board space and thermal management needs in consumer and industrial electronics.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74LVC245ADBR (SSOP-20)

Buffers, Drivers, Receivers, Transceivers FAQ

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

The integrated Ioff circuitry automatically disables the outputs when the device is powered down, preventing damaging current backflow through the device.

Can this transceiver interface with 5-V logic devices?

Yes, the inputs accept voltages up to 5.5 V, allowing it to function as a translator in mixed 3.3-V/5-V system environments.