SN74AHCT245DGSR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74AHCT245DGSR is an octal bus transceiver with three-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and features TTL-voltage compatible inputs. The device provides low-level output current of 8 mA and high-level output current of -8 mA. Propagation delay is typically 10 ns at 5 V with a 50 pF load. It utilizes a VSSOP-20 package and supports an operating temperature range from -40°C to +125°C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• TTL-voltage compatible inputs allow direct interfacing with legacy logic systems.
• Asynchronous two-way communication capability between data buses via DIR control.
• Three-state outputs enable effective bus isolation when OE is asserted high.

Buffers, Drivers, Receivers, Transceivers Applications

• Enable or disable digital signals on a bus
• Hold signals during controller reset sequences
• Debounce mechanical switches

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix 'DGSR' corresponds to the VSSOP-20 package and tape-and-reel carrier configuration. Confirm RoHS compliance status and lead finish details against the latest TI Package Option Addendum. Ensure the procurement channel sources production-active parts rather than NRND or obsolete variants.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component for applications requiring translation from 3.3 V to 5 V logic levels due to its input compatibility. Consider the VSSOP-20 package dimensions for space-constrained PCB layouts. Evaluate thermal resistance metrics if operating near the upper temperature limit of 125°C.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SNx4AHCT245 family of octal bus transceivers. It shares functional characteristics with other packages in the series, such as SOIC and TSSOP variants, but differs in physical footprint and thermal properties. The DGSR suffix specifically denotes the VSSOP package type.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74AHCT245DBR (SSOP-20)

Buffers, Drivers, Receivers, Transceivers FAQ

What is the maximum propagation delay for this device?

The maximum propagation delay is 11 ns at 5 V with a 50 pF load across the recommended operating temperature range.

How does the OE pin affect operation?

When the Output Enable (OE) pin is high, the device enters a high-impedance state, isolating the A and B buses regardless of the DIR input level.