74ALVCR162601T

Overview

The onsemi 74ALVCR162601T is an 18-bit universal bus transceiver housed in a 56-lead Thin Shrink Small Outline Package (TSSOP). It operates with a supply voltage range of 1.65V to 3.6V and features 3.6V tolerant inputs and outputs. The device integrates D-type latches and flip-flops for transparent, latched, or clocked data flow modes. Internal 26Ω series resistors are included on both A and B port outputs to reduce line noise. Propagation delays vary from 4.3 ns at 3.0V–3.6V to 9.2 ns at 1.65V–1.95V.

Feature Summary

• Integrates internal 26 ohm series resistors on output ports to minimize signal reflections and electromagnetic interference.
• Supports multiple data transfer modes including transparent, latched, and clocked operations via dedicated control inputs.
• Provides high impedance states during power-down conditions to support live insertion and withdrawal applications.

Applications

• Memory address drivers
• Clock drivers
• Bus transceivers and transmitters

Procurement Notes

Verify the specific package suffix 'T' corresponds to the 56-lead TSSOP configuration as documented in the datasheet. Confirm that the component meets the required operating temperature range of -40°C to +85°C for your specific application environment. Ensure input signals remain within the specified DC voltage limits to prevent damage.

Selection Notes

Select this component when designing low-voltage systems requiring 18-bit bidirectional data transfer with integrated termination resistance. It is suitable for interfaces needing 3.6V tolerance while operating at lower core voltages. Consider the propagation delay specifications relative to your system clock frequency requirements.

Part Context

This device belongs to the 74ALVC logic family, designed for low-voltage CMOS applications. It combines the speed of ALV technology with the versatility of VCX features, such as 3.6V tolerance. The inclusion of series resistors distinguishes it from standard bus transceivers by offering built-in noise reduction capabilities without external components.

Replacement Considerations

Check for direct pin-compatible alternatives within the same logic family that may offer updated manufacturing sources. Verify that any substitute maintains the 56-lead TSSOP footprint and identical electrical characteristics regarding voltage tolerance and propagation delay.

FAQ

How does the device handle data flow direction?

Data flow direction is controlled by separate Output Enable (OEAB/OEBA), Latch Enable (LEAB/LEBA), and Clock (CLKAB/CLKBA) inputs for each direction independently.

What is the purpose of the internal series resistors?

The 26 ohm series resistors are integrated into the output paths to reduce line noise, signal reflections, and electromagnetic interference in high-speed digital circuits.