SN74AHC245QPWRG4Q1

Buffers, Drivers, Receivers, Transceivers Overview

The SN74AHC245QPWRG4Q1 is an automotive-grade octal bus transceiver with 3-state outputs, qualified under AEC-Q100 standards. It supports a supply voltage range of 2V to 5.5V and operates within a temperature range of -40°C to +125°C. The device features balanced CMOS outputs capable of sourcing and sinking up to 8mA at 5V. Propagation delay is typically 8.5ns at 5V with 50pF load. It utilizes a 20-pin TSSOP package.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Provides asynchronous two-way communication between data buses via direction control input
• Includes output-enable input for effective bus isolation during high-impedance states
• Features standard CMOS inputs requiring fast signal transitions to prevent oscillations
• Balanced CMOS 3-state outputs allow similar current sourcing and sinking capabilities

Buffers, Drivers, Receivers, Transceivers Applications

• Enable or disable digital signals in automotive systems
• Hold signals during controller reset sequences
• Debounce mechanical switches

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the component matches the specific automotive qualification requirements by confirming the AEC-Q100 Grade 1 designation. Ensure the operating environment stays within the specified -40°C to +125°C temperature range. Check that the supply voltage remains between 2V and 5.5V to maintain functional integrity. Confirm the TSSOP-20 package dimensions align with the PCB footprint design specifications.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when designing for automotive environments requiring robust bus communication. It is suitable for applications needing bidirectional data transfer with minimal external timing constraints. Consider the 2V to 5.5V operating range for compatibility with various logic levels. The 3-state outputs facilitate easy bus sharing among multiple devices without complex arbitration logic.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SN74AHC245-Q1 family of octal bus transceivers designed for automotive use. It shares core functionality with non-automotive variants but includes enhanced reliability testing. The Q1 suffix indicates automotive qualification, while G4 denotes lead-free and RoHS compliance. It serves as a bridge between different sections of a vehicle's electronic control network.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74AHC245PW

Buffers, Drivers, Receivers, Transceivers FAQ

How does the OE pin affect bus operation?

The Output Enable (OE) input disables the device when active, placing the outputs in a high-impedance state to effectively isolate the buses.

What is the purpose of the DIR input?

The Direction Control (DIR) input determines the flow of data, allowing transmission from the A bus to the B bus or vice versa based on its logic level.