MC74AC573N

Latches Overview

The MC74AC573N is an octal D-type transparent latch with 3-state outputs manufactured by onsemi. It operates within a supply voltage range of 2.0 V to 6.0 V and supports output currents of ±24 mA. The device features buffered common Latch Enable (LE) and Output Enable (OE) inputs, allowing easy interface with microprocessors due to inputs and outputs being located on opposite sides of the package. It functions identically to the MC74AC373 but offers distinct pinout geometry.

Latches Feature Summary

• Octal D-type transparent latch configuration with 3-state outputs
• Inputs and outputs positioned on opposite sides for simplified microprocessor interfacing
• Buffered common Latch Enable (LE) and Output Enable (OE) control signals

Latches Applications

• Microprocessor input or output port expansion
• Bus interfacing applications requiring high-impedance states
• Octal buffer and line driver circuits

Latches Procurement Notes

Verify that the specific part number suffix matches the required package type, as the datasheet lists SOIC-20W and TSSOP-20 variants. Confirm lead-free status and RoHS compliance requirements against project specifications. Ensure the ordering code aligns with the desired shipping quantity, such as rails or tape and reel formats, to avoid packaging discrepancies during procurement.

Latches Selection Notes

Select this component when an octal latch with 3-state outputs is required in a 20-lead package. Choose the AC variant for operation across a wide voltage range of 2V to 6V. Consider the ACT variant if TTL-compatible input thresholds are necessary for the system logic levels. Verify that the physical layout accommodates the opposite-side pin arrangement for optimal routing.

Latches Part Context

This device belongs to the 74AC series of high-speed CMOS logic components produced by onsemi. It serves as a functional equivalent to the MC74AC373, distinguished primarily by its pinout orientation where data inputs and outputs are placed on opposite sides of the package. This design facilitates easier PCB layout for direct microprocessor connections compared to traditional symmetric layouts.

Latches Replacement Considerations

The MC74AC373 is functionally identical but features a different pinout arrangement. Cross-reference package dimensions and pin assignments carefully before substitution to ensure mechanical compatibility.