74ACQ573SJX

Latches Overview

The onsemi 74ACQ573SJX is an octal D-type latch with 3-STATE outputs, part of the Quiet Series. It features buffered common Latch Enable (LE) and Output Enable (OE) inputs. The device utilizes FACT Quiet Series technology for improved dynamic threshold performance and simultaneous switching noise reduction. It operates within a supply voltage range of 2.0V to 6.0V and supports an operating temperature from -40°C to +85°C. Outputs source and sink up to 24 mA. The component is housed in a 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm wide.

Latches Feature Summary

• Utilizes FACT Quiet Series technology to guarantee quiet output switching and improved dynamic threshold performance.
• Features GTO output control and undershoot corrector for superior performance.
• Inputs and outputs are located on opposite sides of the package to facilitate easy interface with microprocessors.
• Provides guaranteed pin-to-pin skew AC performance and improved latch-up immunity.

Latches Applications

• Microprocessor memory address latching
• I/O port expansion
• Buffered register applications

Latches Procurement Notes

Verify the specific ordering code suffix 'X' indicates tape and reel packaging as per the datasheet. Confirm the manufacturer origin, noting the datasheet is attributed to Fairchild Semiconductor Corporation, which may impact sourcing channels or legacy support status. Ensure the SOP-20 package width matches system board constraints.

Latches Selection Notes

Select this component when high-speed octal latching with low noise characteristics is required. The split ground bus and quiet output switching make it suitable for dense digital systems. Compare propagation delays against system timing requirements at the target supply voltage. Verify that the 3-STATE output buffers meet the load drive requirements of the connected circuitry.

Latches Part Context

This device belongs to the 74ACQ/ACTQ logic family, designed for high-speed operation with reduced power consumption compared to older standards. The Quiet Series specifically addresses electromagnetic interference concerns through controlled slew rates and noise suppression techniques integrated into the silicon design.

Latches Replacement Considerations

SN74ACQ573PW

Latches FAQ

What is the function of the LE input?

When the Latch Enable (LE) input is HIGH, the latches are transparent, allowing data to pass from inputs to outputs. When LE transitions LOW, the data present at the inputs is stored.

How does the OE input affect the outputs?

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

What technology ensures quiet output switching?

The device uses Fairchild’s FACT Quiet Series technology, which includes GTO output control and an undershoot corrector to minimize simultaneous switching noise.