74AC373SCX

Latches Overview

The onsemi 74AC373SCX is an octal transparent latch featuring three-state outputs, housed in a 20-lead Small Outline Integrated Circuit (SOIC) package. Designed for bus-organized systems, 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 includes eight D-type latches where data enters when the Latch Enable input is HIGH. Propagation delays are specified at 13.5 ns maximum at 3.3V and 9.5 ns maximum at 5.0V. Quiescent supply current is limited to 40 µA, while outputs can source or sink up to 24 mA.

Latches Feature Summary

• Contains eight D-type latches with three-state outputs suitable for bus interfacing
• Outputs remain high impedance when Output Enable is HIGH, preventing bus contention
• Data is latched upon the HIGH-to-LOW transition of the Latch Enable signal
• Reduced quiescent supply current and output leakage compared to standard AC logic

Latches Applications

• Bus organized system applications
• Octal storage registers
• Buffering and driving bus lines

Latches Procurement Notes

Verify that the ordering suffix 'X' corresponds to tape and reel packaging as indicated in the datasheet. Confirm the specific manufacturer origin, as this part was originally produced by Fairchild Semiconductor before its acquisition by onsemi. Ensure the component meets the required JEDEC MS-013 package dimensions for the SOIC-20 footprint during integration.

Latches Selection Notes

Select this component for designs requiring octal latching with tri-state capability in a wide voltage range environment. It is appropriate for systems needing TTL-compatible inputs if using the ACT variant, though the AC version requires higher voltage thresholds. Consider the propagation delay specifications relative to system clock speeds and ensure the 24 mA drive capability matches the load requirements of the connected bus lines.

Latches Part Context

This component belongs to the 74AC logic family, characterized by high-speed CMOS technology. It serves as a fundamental building block for digital memory and interface circuits. The 74AC373 specifically provides eight independent latches in a single package, offering a compact solution for data retention and bus isolation in microprocessor-based systems and peripheral interfaces.

Latches Replacement Considerations

Direct substitutes include the 74ACT373SCX for TTL-compatible input requirements. Other compatible variants within the same package include the 74AC373SJ and 74AC373MTCX. Cross-manufacturer equivalents such as the SN74AC373DW from Texas Instruments may also be considered if pin compatibility and electrical characteristics align.