SN74AC573RKSR

Overview

The SN74AC573RKSR is an octal D-type transparent latch with 3-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 2V to 6V and accepts input voltages up to 6V. The device features a maximum propagation delay of 9ns at 5V. It utilizes a 20-pin VQFN package measuring 4.5mm x 2.5mm. The component supports an operating temperature range from -40°C to 125°C.

Feature Summary

• Features 3-state outputs designed for driving bus lines directly without interface components
• Capable of driving highly capacitive or relatively low-impedance loads
• Transparent latch operation allows Q outputs to follow D inputs when latch-enable is high

Applications

• Buffer registers
• Bidirectional bus drivers
• Working registers

Procurement Notes

Verify the specific suffix RKSR corresponds to the VQFN 20-pin package configuration. Confirm the moisture sensitivity level and reflow temperature profile requirements for surface-mount assembly processes. Ensure the operating temperature range meets the target application environment specifications before finalizing procurement.

Selection Notes

Select this component when a wide supply voltage range between 2V and 6V is required. The 3-state output capability makes it suitable for bus-oriented systems. Consider the VQFN package dimensions if space-constrained PCB layouts are necessary. Verify that the input voltage tolerance matches the system logic levels.

Part Context

This part belongs to the SN74AC573 family of octal D-type transparent latches. The RKS suffix specifically denotes the VQFN package variant. Other variants in the series include SOIC, SSOP, and PDIP packages, offering flexibility for different mounting technologies while maintaining identical logical functionality.

Replacement Considerations

SN74AC573DWR (SOIC package)

FAQ

How does the OE pin affect internal latch operations?

The buffered output-enable (OE) input places outputs in a high-impedance state but does not affect the internal operations of the latches. Data can be entered or retained while outputs are disabled.

What is the function of the thermal pad in the RKS package?

The thermal pad can be connected to GND or left floating. It must not be connected to any other signal or supply.