74ABT573AN,112

Overview

The NXP USA Inc. 74ABT573AN,112 is an octal D-type transparent latch with 3-State outputs, manufactured by Philips Semiconductors and distributed by NXP. It operates within a supply voltage range of 4.5V to 5.5V and supports an operating temperature from -40°C to +85°C. The device features flow-through pinout configuration for easy microprocessor interface. Key electrical parameters include propagation delays (Dn to Qn) of 2.8ns typical at 25°C and 4.8ns max at -40°C to +85°C. Output drive capabilities reach 64mA low-level and -32mA high-level current.

Feature Summary

• Octal transparent latch design with independent Enable and Output Enable control gates
• Flow-through pinout configuration facilitating PC board layout and microprocessor interfacing
• 3-State output buffers designed for driving heavily loaded buses or MOS memories
• Power-up 3-State functionality ensuring safe initialization

Applications

• Microprocessor data bus buffering
• Driving heavily loaded 3-State buses
• MOS memory interface applications
• Register storage in digital logic systems

Procurement Notes

Verify the specific package type required, as the 74ABT573A series includes multiple options such as 20-Pin Plastic DIP, SO, SSOP Type II, and TSSOP Type I. Confirm that the 'N' suffix corresponds to the desired package variant for the 74ABT573AN,112 part number. Ensure compatibility with the specified -40°C to +85°C temperature range for the target application environment before finalizing procurement.

Selection Notes

Select this component when an octal latch with 3-State outputs and flow-through pinout is required for direct microprocessor interfacing. It serves as a functional equivalent to the 74ABT373 but offers improved PCB layout flexibility due to its pin arrangement. Consider the BiCMOS technology for low static and dynamic power dissipation combined with high-speed performance suitable for demanding digital logic applications.

Part Context

The 74ABT573A belongs to the 74ABT logic family, known for high-performance BiCMOS technology. It is functionally identical to the 74ABT373 but utilizes a flow-through pinout configuration. This design allows inputs and outputs to be positioned on opposite sides of the package, simplifying circuit board layout and enabling easier connections to microprocessors compared to traditional parallel input/output arrangements.

Replacement Considerations

The 74ABT373 is functionally identical but lacks the flow-through pinout. Verify pin compatibility if substituting directly into existing layouts without redesigning the PCB trace routing.