74LVC161284TTR

Specialty Logic Overview

The STMicroelectronics 74LVC161284TTR is a low voltage high speed IEEE 1284 transceiver IC housed in a 48-TSSOP package. It operates within a supply voltage range of 3.0V to 3.6V and supports an operating temperature from -40°C to 85°C. The device integrates eight bidirectional buffers and eleven control/status buffers with open-drain outputs, featuring integrated pull-up resistors. Propagation delay is specified at a maximum of 9ns at VCC = 3V.

Specialty Logic Feature Summary

• Supports IEEE STD 1284-I (Level 1 Type) and IEEE STD 1284-II (Level 2 Type) for bidirectional parallel communications between personal computers and printing peripherals.
• Provides translation capability allowing outputs on cable side to interface with 5V signals while eliminating the need for discrete resistors via integrated pull-ups.
• Replaces the function of two separate 74LVC1284 devices by combining buffer functions into a single silicon gate C2MOS technology chip.

Specialty Logic Applications

• Extended Capabilities Port Mode (ECP) signaling for bi-directional parallel peripherals
• Bidirectional parallel communication interfaces between personal computers and printing peripherals
• High-speed data transfer applications requiring IEEE 1284 compliance

Specialty Logic Procurement Notes

Verify that the component matches the specific TSSOP-48 package configuration and ordering code 74LVC161284TTR. Confirm the manufacturer is STMicroelectronics and check datasheet revisions to ensure compatibility with intended voltage levels and signal requirements. Ensure environmental specifications align with operational needs.

Specialty Logic Selection Notes

Select this component when designing systems requiring a single-chip solution for IEEE 1284 protocols. It is suitable for applications needing translation between 3.3V logic and 5V tolerant cable ports. Consider its commercial temperature range (-40°C to 85°C) and low power dissipation characteristics for portable or space-constrained designs.

Specialty Logic Part Context

This part belongs to the 74LVC series of low voltage CMOS logic devices. It is designed to provide standard signaling methods for extended capabilities ports. The device utilizes silicon gate C2MOS technology to achieve high speed and low power consumption, serving as a specialized interface controller for peripheral connections.

Specialty Logic Replacement Considerations

Public confirmed substitute part numbers include SN74LVC161284DGGR and SN74LV161284DGGR from Texas Instruments.

Specialty Logic FAQ

What is the purpose of the HD input pin?

The HD (Active HIGH) input pin enables the Cable port to switch from Open Drain mode to a high drive totem pole output, capable of sourcing significant current on all thirteen buffers.

How does the DIR input affect data flow?

The DIR input determines the direction of data flow on the bidirectional buffers. Active HIGH enables data flow from A port to B port, while Active LOW enables data flow from B port to A port.