MC74ACT573DWG

Latches Overview

The MC74ACT573DWG is an octal latch with 3-state outputs manufactured by onsemi. It operates within a supply voltage range of 4.5 V to 5.5 V and features TTL-compatible inputs. The device provides buffered common Latch Enable (LE) and Output Enable (OE) inputs. At 5 V, the propagation delay from Dn to On is typically 10.5 ns, while LE to On is typically 10.5 ns. Quiescent supply current is 8 µA at 25°C. Outputs can source or sink up to 24 mA. It is housed in a SOIC-20 package.

Latches Feature Summary

• Features inputs and outputs on opposite sides of the package for easy microprocessor interfacing
• Includes buffered common Latch Enable and Output Enable inputs
• Provides 3-state outputs suitable for bus interfacing
• Contains eight D-type latches with high-current drive capability

Latches Applications

• Input or output port for microprocessors
• Bus interfacing applications
• Octal buffer/line driver circuits

Latches Procurement Notes

Verify the specific ordering suffix 'DWG' corresponds to the SOIC-20 package and Pb-Free status as documented in the manufacturer's ordering information. Confirm that the lead marking matches the ACT573 code. Ensure compliance with RoHS directives and check moisture sensitivity level requirements during storage and handling prior to assembly.

Latches Selection Notes

Select this component when TTL-compatible input levels are required alongside AC-speed performance. It serves as a functional alternative to the MC74AC573 where specific input threshold characteristics are necessary. Consider the SOIC-20 package dimensions and thermal resistance values if operating near maximum temperature limits. Verify that the 24 mA output drive capability meets the load requirements of the destination circuitry.

Latches Part Context

This part belongs to the MC74ACT573 series of octal latches. It is functionally identical to the MC74AC373 but differs in pinout orientation, placing inputs and outputs on opposite sides. This configuration facilitates direct connection to microprocessors without crossing traces. The device is part of the broader 74ACT logic family designed for high-speed digital applications.

Latches Replacement Considerations

MC74AC573DWG

Latches FAQ

How does the MC74ACT573 differ from the MC74AC573?

The MC74ACT573 has TTL-compatible input voltage thresholds, whereas the MC74AC573 uses standard CMOS thresholds. Both share similar speed and output drive characteristics.

What is the function of the OE input?

The Output Enable (OE) input controls the 3-state buffers. When OE is HIGH, the outputs enter a high-impedance state. When OE is LOW, the buffers are enabled.