74AC573MTC

Overview

The onsemi 74AC573MTC is an octal D-type latch with 3-STATE outputs housed in a 20-lead TSSOP 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. Key electrical parameters include propagation delays (Dn to On) ranging from 7.0ns to 12.0ns at 5.0V, output drive capabilities of ±24mA, and maximum quiescent supply current of 40μA.

Feature Summary

• Features 3-STATE outputs for effective bus interfacing applications
• Inputs and outputs are positioned on opposite sides of the package to facilitate microprocessor interface routing
• Functionally identical to the 74AC373 variant but with reversed pinout orientation

Applications

• Microprocessor input or output port expansion
• Bus interfacing systems requiring high-impedance states
• Octal data storage and latching circuits

Procurement Notes

Verify that the specific ordering code matches the required package style, as the 74AC573 series is available in multiple form factors including SOIC, SOP, TSSOP, and PDIP. Confirm the absence of suffix letters if tape and reel packaging is not intended, as these indicate alternative shipping configurations. Ensure compatibility with the target system's voltage levels and thermal requirements before finalizing procurement.

Selection Notes

Select this component when a high-speed octal latch with tri-state capability is required for bus architectures. The AC logic family offers superior speed compared to standard HC or HCT variants while maintaining CMOS power efficiency. Consider the physical layout benefits of the opposite-side I/O arrangement for dense PCB designs where trace routing complexity must be minimized.

Part Context

This device belongs to the 74AC logic family, characterized by high-speed operation and low power consumption. It serves as a functional equivalent to the 74AC373, differing primarily in the physical placement of inputs and outputs. The MTC suffix specifically denotes the 20-lead Thin Shrink Small Outline Package (TSSOP), which provides a compact footprint suitable for space-constrained electronic assemblies.

Replacement Considerations

The 74AC373 is functionally identical but features inverted pinouts. For direct replacement without board redesign, verify pin alignment. Other 74AC573 equivalents from different manufacturers may require verification of propagation delay specifications and output drive currents to ensure signal integrity compatibility.