SN74ACT1073DWR

Specialty Logic Overview

The SN74ACT1073DWR is a 16-bit bus-termination array with an integrated bus-hold function, manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and supports input voltages up to 5.5 V. The device utilizes a 20-pin SOIC (DW) package for surface-mount installation. It features low power consumption comparable to CMOS technology and includes ESD protection exceeding JESD 22 standards, specifically 2000-V human-body model and 200-V machine model ratings.

Specialty Logic Feature Summary

• Integrated bus-hold function maintains the last valid logic state on floating bus lines without requiring external pull-up or pull-down resistors.
• Low-impedance diodes clamp undershoots and overshoots caused by line reflections to ensure signal integrity.
• Center-pin VCC and GND configuration minimizes high-speed switching noise.
• Inputs are TTL-voltage compatible while accepting voltages up to 5.5 V.

Specialty Logic Applications

• Terminating output of driving devices in CMOS systems
• Holding inputs of driven devices at the logic level prior to establishing a high-impedance state
• Preventing bus lines from floating during high-impedance transitions

Specialty Logic Procurement Notes

Verify the specific ordering suffix to confirm the tape and reel packaging format required for automated assembly processes. Confirm that the active production status aligns with long-term availability requirements for your design lifecycle. Ensure the SOIC package dimensions match your PCB footprint specifications before finalizing procurement orders.

Specialty Logic Selection Notes

Select this component when designing CMOS systems that require defined voltage levels on floating bus lines. It is suitable for applications needing to reduce signal reflections and maintain data integrity during bus transitions. Consider its TTL compatibility if interfacing with legacy logic families while operating at standard ACT voltage levels.

Specialty Logic Part Context

This part belongs to the SN74ACT series of logic devices, designed for high-speed CMOS applications. It serves as a specialized solution for bus termination and hold functions, distinct from standard flip-flops or buffers. The device integrates both termination and holding capabilities into a single 16-bit channel architecture.

Specialty Logic Replacement Considerations

Public confirmed substitute part numbers: SN74ACT1073DW, SN74ACT1073NSR, SN74ACT1073NSR.A.

Specialty Logic FAQ

How does the bus-hold function operate?

The bus-hold function uses a CMOS-buffer stage with a high-resistance feedback path between its output and input to keep a bus line tied to the last valid logic state generated by an active driver.

What is the purpose of the center-pin VCC and GND configuration?

This configuration is designed to minimize high-speed switching noise within the device during operation.