SN74AHC573QPWRG4Q1

Overview

The SN74AHC573QPWRG4Q1 is an automotive-grade octal transparent D-type latch manufactured by Texas Instruments. It operates within a supply voltage range of 2 V to 5.5 V and features three-state outputs. The device is qualified under AEC-Q100 standards for automotive applications, ensuring reliability in harsh environments. It utilizes CMOS logic technology and is housed in a TSSOP-20 package. Key electrical parameters include a propagation delay of 14.5 ns and 8.8 ns, with a maximum static current of 4 uA. Output drive capabilities provide a low-level output current of 32 mA and a high-level output current of -8 mA. The component supports a wide operating temperature range from -40°C to +125°C.

Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for reliable operation in vehicle electronics.
• Octal configuration providing eight independent transparent D-type latches with shared control inputs.
• Three-state output design enabling direct bus-driven connections without external pull-up or pull-down resistors.
• Wide supply voltage compatibility ranging from 2 V to 5.5 V for flexible system integration.

Applications

• Automotive data acquisition systems requiring robust signal storage.
• Vehicle communication interfaces utilizing bus-driven architectures.
• Electronic control units (ECUs) needing high-density memory elements.
• Industrial automation controllers operating in extreme temperature conditions.

Procurement Notes

Verify the complete part number including suffixes such as G4 and Q1 to ensure correct automotive qualification and packaging specifications. Confirm that the procurement channel provides original manufacturer documentation to validate authenticity. Check for specific tape-and-reel quantities if bulk ordering is required. Ensure compliance with RoHS directives and material declarations before finalizing purchase orders for production use.

Selection Notes

Select this component when designing automotive circuits requiring octal latching functionality with three-state outputs. Consider the 2 V to 5.5 V operating range for compatibility with various power domains. Evaluate the TSSOP-20 package constraints against available PCB space. Compare propagation delays against system timing requirements to ensure signal integrity. Verify thermal performance within the specified -40°C to +125°C range for the intended application environment.

Part Context

This device belongs to the SN74AHC573-Q1 family of octal transparent D-type latches designed specifically for automotive applications. It shares functional similarities with other members of the AHC series but offers enhanced speed and lower power consumption compared to standard HC logic. The Q1 suffix denotes automotive qualification, while G4 indicates lead-free and RoHS-compliant manufacturing processes. This family is commonly used in digital interface circuits where data retention and bus isolation are critical.

Replacement Considerations

Direct substitutes include SN74AHC573QPWRQ1 and SN74AHC573PW. Verify pinout compatibility and electrical characteristics before substitution. Alternative packages may require adapter solutions or PCB redesigns. Ensure replacement parts maintain AEC-Q100 qualification if automotive reliability is mandatory.