SN74HC573AQDWRQ1

Overview

The SN74HC573AQDWRQ1 is an automotive-grade octal transparent D-type latch from Texas Instruments, designed for high-speed digital applications. It features eight D-type latches with three-state outputs and operates within a supply voltage range of 2V to 6V. The device utilizes HC logic technology and is housed in a 20-SOIC surface-mount package. Key electrical parameters include a propagation delay of 200 ns at 2 V, 40 ns at 4.5 V, and 34 ns at 6 V. Static current consumption is specified at 8 uA. The component supports low-level output currents of 32 mA and high-level output currents of -7.8 mA. It is qualified under AEC-Q100 standards and functions reliably across an extended temperature range from -40°C to +125°C.

Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for reliable operation in vehicle environments
• Octal configuration providing eight independent transparent D-type latches with shared control inputs
• Three-state outputs allowing direct bus-driven connections without external buffer drivers
• Extended temperature performance capability spanning from -40°C to +125°C

Applications

• Automotive electronic systems requiring certified logic components
• High-speed data buffering and storage in digital circuits
• Bus-oriented memory mapping and address decoding
• Portable equipment utilizing low-power CMOS logic families

Procurement Notes

Verify the complete part number including the suffix QDWRQ1 to ensure correct automotive grade and tape-and-reel packaging specifications. Confirm that the intended application environment falls within the specified -40°C to +125°C operating temperature range. Ensure supply voltage constraints between 2V and 6V are strictly maintained during system design. Cross-reference the datasheet for accurate pinout compatibility with existing PCB layouts.

Selection Notes

Select this component when automotive reliability and high-speed performance are required simultaneously. The HC series offers faster switching speeds compared to standard TTL equivalents while maintaining CMOS low power characteristics. Consider the 20-SOIC package dimensions for space-constrained board designs. Evaluate the 32 mA sink current capability against load requirements to determine if additional buffering is necessary for heavy capacitive loads.

Part Context

This device belongs to the SN74HC573A-Q1 family of octal transparent latches. It shares functional similarities with non-automotive variants like the SN74HC573ADWR but includes specific quality controls for automotive use. The product line supports various packaging options including SOIC and SSOP formats. It serves as a core building block for complex digital systems requiring parallel data retention and controlled output states.

Replacement Considerations

Direct substitutes include other SN74HC573 variants with compatible pinouts such as SN74HC573ADBR or SN74HC573ADWR. Verify that alternative parts meet the same AEC-Q100 qualification if automotive certification is mandatory. Check for differences in propagation delay and output drive strength when swapping between different logic sub-families.