SN74AHCT573PWR

Overview

The SN74AHCT573PWR is an octal transparent D-type latch manufactured by Texas Instruments. It features TTL-compatible inputs and operates within a supply voltage range of 4.5 V to 5.5 V. The device provides eight non-inverting outputs with a propagation delay of 12 ns at 5 V. It is housed in a 20-pin TSSOP package and supports a wide operating temperature range from -40°C to +85°C.

Feature Summary

• TTL-compatible input logic levels for direct interfacing with standard logic families
• Transparent operation where outputs follow data inputs when the latch enable signal is active high
• Data latching capability that holds output states stable when the enable signal transitions low

Applications

• Parallel-to-serial data conversion circuits
• Register file storage elements in digital systems
• Bus driver applications requiring data retention

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct packaging and tape-and-reel specifications. Confirm that the component meets all required environmental standards and RoHS compliance criteria for your target application before finalizing procurement orders.

Selection Notes

Select this component when TTL-compatible input thresholds are required alongside AHC speed performance. Ensure the design accommodates the specified 4.5 V to 5.5 V supply voltage range. Verify that the TSSOP-20 package dimensions fit the available PCB footprint constraints.

Part Context

This part belongs to the SN74AHCT series, which combines the high-speed CMOS technology of the AHC family with TTL-compatible input structures. It serves as a standard solution for buffering and latching data buses in mixed-voltage digital environments requiring reliable state retention.

Replacement Considerations

SN74AHCT573PW

FAQ

How does the latch enable signal control the output state?

When the latch enable (LE) input is high, the outputs are transparent and follow the data inputs. When LE goes low, the output values are latched and remain constant regardless of subsequent changes at the data inputs.

What is the significance of the TTL-compatible inputs?

The TTL-compatible inputs allow the device to interface directly with older TTL logic families without requiring additional level-shifting circuitry, simplifying system design in mixed-technology environments.