74VHC161284MTD

Specialty Logic Overview

The Fairchild Semiconductor 74VHC161284MTD is a low-voltage CMOS translating transceiver designed for IEEE 1284 compliant interfaces. It integrates eight bidirectional data buffers and eleven control/status buffers to support Extended Capabilities Port (ECP) mode. The device facilitates signal translation between peripheral and host sides, ensuring compatibility with varying voltage levels while maintaining high-speed parallel communication standards.

Specialty Logic Feature Summary

• Supports IEEE 1284 Level 1 and Level 2 signaling standards for bidirectional parallel communications
• Provides translation capability allowing cable side outputs to interface with 5V signals
• Features internal pull-up resistors on C inputs and B/Y outputs for stable logic states
• Includes power-up protection to prevent errors during printer initialization

Specialty Logic Applications

• Extended Capabilities Port (ECP) implementations in personal computer systems
• Bidirectional parallel communication interfaces between PCs and printing peripherals
• Signal translation stages connecting low-voltage logic to 5V tolerant buses

Specialty Logic Procurement Notes

Verify the specific suffix 'MTD' against official Fairchild or ON Semiconductor documentation to confirm package type and tape/reel specifications. Ensure the component matches the required operating temperature range and voltage supply constraints defined in the datasheet before integration into final designs.

Specialty Logic Selection Notes

Select this component when designing interfaces requiring IEEE 1284 compliance with mixed voltage domains. It serves as a direct functional replacement for dual 74ACT1284 configurations, simplifying board layout. Verify input hysteresis requirements and output drive capabilities match the external cable impedance specifications.

Specialty Logic Part Context

This part belongs to the 74VHC series of high-speed CMOS logic devices. It is manufactured by Fairchild Semiconductor, which has since been acquired by ON Semiconductor. The device is part of a family of translating transceivers designed to bridge different logic voltage levels in legacy and modern parallel interface applications.

Specialty Logic Replacement Considerations

The datasheet indicates this device replaces the function of two 74ACT1284 devices. Verify pinout compatibility and electrical characteristics against any alternative single-chip translators from other manufacturers to ensure seamless integration without circuit modification.