MC74AC573DWG

Latches Overview

The MC74AC573DWG is an octal D-type 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 for high-speed data storage and bus interfacing. Propagation delays from data inputs to outputs are typically 2.5 ns at 5.0 V, while LE-to-output delays are similarly fast. The component is housed in a 20-lead SOIC Wide package.

Latches Feature Summary

• Inputs and outputs located on opposite sides of the package to facilitate microprocessor interface routing
• Functionally identical to the MC74AC373 but with inverted pinout orientation
• Outputs capable of sourcing and sinking 24 mA for direct drive applications
• Pb-free construction compliant with environmental standards

Latches Applications

• Microprocessor input or output port expansion
• Bus-oriented system interfacing via 3-state outputs
• Octal buffer and line driver applications

Latches Procurement Notes

Verify the specific ordering suffix 'DWG' corresponds to the SOIC-20W package configuration. Confirm that the 'G' suffix indicates Pb-free status as defined in the manufacturer's ordering information. Ensure compatibility with the required operating temperature range of -40°C to +85°C for standard commercial grade devices.

Latches Selection Notes

Select this component when an octal latch with 3-state outputs is required for systems utilizing 2V to 6V logic levels. Choose the AC series over ACT if TTL-compatible inputs are not necessary, as the AC variant offers a wider supply voltage range. Verify that the physical layout accommodates the opposite-side input/output arrangement distinct from the MC74AC373.

Latches Part Context

This part belongs to the MC74AC573/74ACT573 family of high-speed octal latches. It serves as a functional equivalent to the MC74AC373, distinguished primarily by its pinout geometry where inputs and outputs are positioned on opposite sides of the package. This design simplifies PCB trace routing for microprocessor interfaces compared to traditional configurations.

Latches Replacement Considerations

MC74AC373DWG: Functionally identical logic but with inputs and outputs on the same side of the package; requires PCB redesign.

Latches FAQ

How does the MC74AC573 differ from the MC74AC373?

They are functionally identical octal latches, but the MC74AC573 has inputs and outputs on opposite sides of the package, whereas the MC74AC373 has them on the same side.

What is the maximum output current capability?

The outputs can source and sink up to 24 mA under recommended operating conditions.