SN74ACT573RKSR

Overview

The SN74ACT573RKSR is an octal D-type transparent latch with three-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 4.5V to 5.5V and features TTL-voltage compatible inputs. The device provides a maximum propagation delay of 9.5ns at 5V. It utilizes a 20-pin VQFN package (RKS) and supports an operating temperature range from -40°C to 125°C.

Feature Summary

• Features eight D-type transparent latches with three-state outputs designed for driving highly capacitive or low-impedance loads.
• Inputs accept voltages up to 5.5V, ensuring compatibility with TTL logic levels.
• Includes a buffered output-enable input to place outputs in high-impedance states without affecting internal latch operations.

Applications

• Parallel data storage
• Digital bus buffer
• Bus drivers

Procurement Notes

Verify the specific RKS package variant against the latest TI Package Option Addendum to confirm active production status and lead finish specifications. Ensure the procurement channel sources components directly from authorized distributors to guarantee authenticity and traceability. Cross-reference the ordering suffix with official documentation to validate moisture sensitivity level ratings and peak reflow temperatures prior to finalizing orders.

Selection Notes

Select this component when designing systems requiring octal data latching with high drive capability for bus applications. The ACT series offers faster switching speeds compared to standard AC counterparts while maintaining CMOS power efficiency. Verify that the required operating temperature range aligns with the -40°C to 125°C specification for industrial environments.

Part Context

This part belongs to the SNx4ACT573 family of octal D-type transparent latches. The family includes military-grade SN54 variants and catalog SN74 variants available in multiple packages such as SOIC, SSOP, TSSOP, and VQFN. The RKS suffix specifically denotes the 20-pin Very Small Quad Flat No-Lead package configuration.

Replacement Considerations

SN74ACT573DBR

FAQ

How does the output-enable (OE) pin affect latch operation?

The OE pin controls the state of the outputs but does not affect the internal operation of the latches. Data can be entered or retained while the outputs are in the high-impedance state.

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

The thermal pad in the VQFN package can be connected to ground or left floating. It should not be connected to any other signal or supply.