74LVX161284AMTX

Overview

The onsemi 74LVX161284AMTX is a low voltage translating transceiver designed to implement a full IEEE 1284 compliant interface. It contains eight bidirectional data buffers and eleven control/status buffers, supporting Extended Capabilities Port (ECP) mode. The device features separate power supply pins for the peripheral side (VCC) and cable side (VCC—Cable), allowing the cable-side outputs to be driven by higher voltages up to 5.5V while the A-side operates at 3.0V to 3.6V. It supports both open drain and high drive configurations on the cable side.

Feature Summary

• Supports IEEE 1284 Level 1 and Level 2 signaling standards for bidirectional parallel communications
• Translation capability enables cable-side outputs to interface with 5V signals
• All inputs feature hysteresis to provide enhanced noise margin
• B and Y output resistance optimized to drive external cables

Applications

• Extended Capabilities Port (ECP) mode implementation
• Bidirectional parallel communication between personal computers and printing peripherals
• Replacing two 74ACT1284 devices in existing designs

Procurement Notes

Verify package type MTD48 (48-Lead Thin Shrink Small Outline Package). Confirm VCC and VCC—Cable voltage requirements match system design. Check RoHS compliance status as indicated in distributor listings. Ensure ESD handling procedures are followed during assembly.

Selection Notes

Select this component when an IEEE 1284 compliant interface is required with mixed voltage domains. Suitable for applications needing translation between 3V logic and 5V cable-side signals. Consider the flow-through pin configuration for easy Peripheral-to-Host interfacing. Evaluate power-down leakage characteristics if standby current is critical.

Part Context

This device belongs to the LVXZ logic family, characterized by low voltage operation and CMOS technology. It serves as a specialized interface solution within the broader category of translating transceivers and logic ICs. The part replaces older ACT series equivalents, offering improved performance in low voltage environments.

Replacement Considerations

The datasheet states it replaces the function of two 74ACT1284 devices. Verify pin compatibility and voltage levels before substitution. No other specific substitute part numbers are documented in the provided source material.