SN74AC573QWRKSRQ1

Overview

The SN74AC573QWRKSRQ1 is an automotive-grade octal transparent D-type latch with 3-state outputs, qualified to AEC-Q100 standards. It operates within a supply voltage range of 1.5V to 6V and supports a temperature range of -40°C to +125°C. The device features balanced CMOS outputs capable of continuous ±24mA drive at 5V, with short-burst support up to ±75mA. Propagation delay (tpd) reaches a maximum of 7.9ns at 5V with a 50pF load. Inputs accept voltages up to 6V, enabling direct interfacing with 5V systems while powered by lower voltages.

Feature Summary

• AEC-Q100 qualification for Grade 1 automotive applications
• Wide operating voltage range from 1.5V to 6V
• Balanced CMOS 3-state outputs with high drive capability
• Transparent latch logic with shared control inputs

Applications

• Parallel data storage
• Digital bus buffering

Procurement Notes

Verify the specific package suffix 'RKS' corresponds to the WQFN-20 form factor required for your layout. Confirm that the 'Q1' designation aligns with your automotive grade requirements. Ensure input signals respect the absolute maximum ratings to prevent clamp diode overstress. Validate thermal performance against the junction-to-ambient resistance values provided in the datasheet for your specific PCB copper area.

Selection Notes

Select this component when driving transmission lines or long traces is necessary due to its ability to drive 50Ω lines. Consider the RKS package if board space is constrained, as it offers a smaller footprint compared to TSSOP or VSSOP options. Verify that the input transition rates meet the recommended specifications to avoid excessive power consumption or oscillation during operation.

Part Context

This part belongs to the SN74AC573-Q1 family of automotive octal latches. It shares functional compatibility with other members of the series but differs in physical packaging. The RKS variant utilizes a WQFN package, distinguishing it from the PW (TSSOP) and DGS (VSSOP) versions available within the same product line.

Replacement Considerations

SN74AC573DWRQ1

FAQ

How does the Output Enable (OE) pin affect internal latch operations?

The OE pin controls only the output state. It places outputs in a high-impedance state without affecting the internal latching process, allowing data retention or entry while outputs are disabled.

What is the behavior of unused inputs on this device?

Unused standard CMOS inputs must not be left floating. They should be terminated to either VCC or GND, typically using a pull-up or pull-down resistor, to ensure proper operation and prevent oscillation.