SN74ACT240QWRKSRQ1

Buffers, Drivers, Receivers, Transceivers Overview

The SN74ACT240QWRKSRQ1 is an automotive-grade octal buffer or driver with three-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 4.5V to 5.5V and supports an operating temperature from -40°C to +125°C. The device features two banks of four inverting drivers, each with a shared output enable pin. It provides continuous ±24mA output drive at 5V and can support up to ±75mA in short bursts. Maximum propagation delay is 9.6ns at 5V with a 50pF load.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• AEC-Q100 qualified for automotive applications with specified temperature grades and ESD classification levels
• Available in wettable flank QFN package to improve side wetting and facilitate automatic optical inspection
• TTL-compatible CMOS inputs designed to interface directly with TTL logic devices

Buffers, Drivers, Receivers, Transceivers Applications

• Smartphone handset circuits
• Network switch signal buffering
• Health and fitness wearable electronics

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'RKS' corresponds to the WQFN-20 package variant when ordering. Confirm that the component meets AEC-Q100 Grade 1 requirements for your target automotive environment. Ensure input signals transition quickly to prevent oscillation due to the TTL-compatible CMOS input structure. Unused inputs must be terminated to VCC or GND during operation.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component for designs requiring high-speed signal inversion and driving capabilities in automotive environments. The balanced CMOS outputs provide similar sourcing and sinking currents. Consider the thermal resistance metrics if operating near maximum junction temperatures. Verify that the capacitive load does not exceed recommended limits to maintain switching performance specifications.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SN74ACT240-Q1 family of automotive octal buffers. It shares functional characteristics with other members like the SN74ACT244-Q1 but differs in inversion polarity. The RKS suffix specifically denotes the WQFN package type, which includes a thermal pad for improved heat dissipation compared to standard QFN packages.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74ACT240QPWRQ1 (TSSOP-20 package)

Buffers, Drivers, Receivers, Transceivers FAQ

How should unused inputs be handled?

Unused inputs must never be left floating. They should be terminated to either VCC or ground using a pull-up or pull-down resistor, typically 10kΩ, to prevent undefined operational states.

What is the purpose of the wettable flanks on the RKS package?

Wettable flanks improve side wetting after soldering, creating additional surface area for solder adhesion. This feature assists in reliably creating side fillets and makes the package easier to inspect using automatic optical inspection (AOI).