74AC573SC

Overview

The onsemi 74AC573SC is an octal D-type latch with 3-STATE outputs housed in a 20-Lead Small Outline Integrated Circuit (SOIC) package. It operates within a supply voltage range of 2.0V to 6.0V and supports an operating temperature from -40°C to +85°C. The device features buffered common Latch Enable (LE) and Output Enable (OE) inputs, allowing data transparency when LE is HIGH and storage upon transition to LOW. Outputs can source or sink up to 24 mA, facilitating direct bus interfacing.

Feature Summary

• Buffered common Latch Enable and Output Enable inputs for simplified control
• Inputs and outputs positioned on opposite sides of the package to facilitate microprocessor interface routing
• 3-STATE output buffers enable direct connection to system buses without external drivers

Applications

• Microprocessor input/output port buffering
• Bus-oriented memory addressing
• Register applications requiring high-speed data latching

Procurement Notes

Verify that the ordering code matches the specific SOIC package variant required for your design. Confirm that the component meets the necessary RoHS compliance standards for your region. Ensure that the supply voltage and temperature ranges align with your system's operational environment before finalizing procurement.

Selection Notes

Select this component when a high-speed octal latch with 3-STATE outputs is required. The AC series offers faster propagation delays compared to HC variants. Consider the ACT series if TTL-compatible input thresholds are necessary for 5V logic systems. Verify package availability and lead times against project schedules.

Part Context

This component belongs to the 74AC family of high-speed CMOS logic devices. It is functionally identical to the 74AC373 but differs in pinout orientation, placing inputs and outputs on opposite sides. This layout is specifically designed to simplify printed circuit board routing for microprocessor interfaces.

Replacement Considerations

The 74AC373 is functionally identical but has a different pinout arrangement. For 5V-only applications requiring TTL-compatible inputs, the 74ACT573 is a suitable alternative. Other manufacturers producing equivalent 74AC573 parts should be verified for electrical parameter compatibility.