74AC573SJ

Latches Overview

The Fairchild Semiconductor 74AC573SJ is an octal transparent latch featuring buffered common Latch Enable (LE) and Output Enable (OE) inputs. It provides non-inverting outputs with three-state capability for bus interfacing. The device operates within a supply voltage range of 2.0 V to 6.0 V, supporting propagation delays as low as 18 ns at 5 V. It includes Schmitt-trigger inputs on all channels for noise immunity and is housed in a 20-pin DIP package.

Latches Feature Summary

• Octal transparent latch architecture with buffered control inputs
• Three-state outputs designed for direct bus interfacing applications
• Schmitt-trigger inputs provide enhanced noise immunity

Latches Applications

• Microprocessor address and data bus buffering
• Input/output port expansion in embedded systems
• General-purpose memory interface circuits

Latches Procurement Notes

Verify the specific suffix 'SJ' against the manufacturer's current datasheet to confirm pinout compatibility and package dimensions. Ensure RoHS compliance status matches project requirements, as older manufacturing runs may differ. Confirm availability through authorized distributors given potential lifecycle changes.

Latches Selection Notes

Select this component when high-speed latching with bus isolation is required. The AC series offers faster performance than HC variants. Verify that the 2.0 V to 6.0 V operating range aligns with the system power supply. Check input voltage levels to ensure compatibility with the driving logic family.

Latches Part Context

This part belongs to the 74AC logic family, known for high-speed CMOS performance. It is functionally similar to the 74AC373 but features inputs and outputs on opposite sides of the package, facilitating easier PCB layout for microprocessor interfaces. The SJ suffix typically denotes a 20-pin DIP package variant.

Latches Replacement Considerations

The 74ACT573SJ serves as a compatible alternative with TTL-compatible inputs. Other equivalents include the SN74AC573 from Texas Instruments or MC74AC573 from onsemi. Verify package type and electrical specifications before substitution.