74ACQ573SCX

Latches Overview

The Fairchild Semiconductor 74ACQ573SCX is an octal transparent latch featuring three-state outputs, designed for high-speed digital applications. It operates within a supply voltage range of 2V to 6V and supports output currents of up to 24mA. The device utilizes a 20-pin QSOP package and maintains a wide operating temperature range from -40°C to +85°C. Key electrical characteristics include a propagation delay of approximately 10ns at 5V and low quiescent current consumption, making it suitable for bus-oriented architectures.

Latches Feature Summary

• Octal transparent latch configuration with buffered common latch enable and output enable inputs
• Three-state outputs facilitating direct bus interfacing without external buffers
• TTL-compatible input thresholds ensuring reliable logic level recognition
• High noise immunity and reduced power dissipation compared to standard AC series

Latches Applications

• Microprocessor memory address latching
• I/O port expansion in embedded systems
• Bus-driven display drivers
• Register files in data communication equipment

Latches Procurement Notes

Verify the specific suffix 'SCX' against the manufacturer's official datasheet to confirm package type and tape-and-reel specifications. Ensure compatibility with RoHS directives if required by your assembly process. Cross-reference the part number with onsemi documentation, as Fairchild Semiconductor's semiconductor division has been acquired. Confirm lead times and availability through authorized distributors rather than relying on generic stock estimates.

Latches Selection Notes

Select this component when an octal latch with three-state capability is required for bus-based designs. It serves as a functional equivalent to the 74AC373 but with pinout optimization for microprocessor interfaces. Consider the 2V to 6V operating range for flexibility in varying supply voltages. Ensure the QSOP package fits the PCB footprint constraints and thermal requirements of the application environment.

Latches Part Context

The 74ACQ573SCX belongs to the 74AC (Advanced CMOS) logic family, known for high speed and low power consumption. It is functionally identical to the 74AC373 but features inputs and outputs on opposite sides of the package, simplifying PCB layout for microprocessor connections. The 'Q' suffix typically denotes qualified or enhanced reliability versions, while 'SCX' indicates the specific surface-mount packaging and reel configuration.

Latches Replacement Considerations

The 74ACT573MTC is a documented similar alternative offering TTL-compatible inputs. Other potential replacements include the 74ABT373 for higher speed requirements or the 74HC573 for lower cost applications. Verify pin compatibility and electrical parameters before substitution.