NXP Semiconductors 74ALVCH16244DL,112

Overview

74ALVCH16244DL,112 from Nexperia is a 16-bit CMOS buffer/line driver with 3-state outputs, four independent output enables (1OE–4OE), bus hold on all data inputs, and IOFF partial power-down protection. It operates from 1.2 V to 3.6 V, delivers ±24 mA drive at 3.0 V, and supports 2.5 V/3.3 V logic interfacing in memory address/data bus expansion systems.

For engineers reviewing the 74ALVCH16244DL,112 datasheet, 74ALVCH16244DL,112 pinout, 74ALVCH16244DL,112 application, or 74ALVCH16244DL,112 equivalent, key selection criteria include bus hold functionality, 48-pin TSSOP package compatibility, IOFF-enabled system-level power sequencing, and propagation delay ≤3.0 ns at 3.3 V.

Technical Context

This device implements four independent 4-bit non-inverting buffers, each controlled by a dedicated active-low output enable (1OE–4OE). Its bus hold circuitry actively maintains valid logic levels on unused inputs without external resistors, eliminating floating node risks in high-density PCB layouts.

The IOFF feature disables outputs during partial power-down, blocking backflow current when VCC = 0 V while inputs remain at up to 5.5 V - critical for hot-swap and multi-rail power domain isolation in industrial control backplanes and server I/O modules.

Key Specifications

Pinout & Package

TSSOP48 plastic thin shrink small outline package (SOT362-1), 48 leads, body width 6.1 mm, 0.5 mm pitch, lead finish matte tin.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit buffer applications.

Compared with 74ALVCH16244DL,112, the 74ALVC16244DGG saves cost but adds design overhead for external biasing, while the SN74LVC16244ADGGR lacks documented IOFF protection - making the Nexperia part uniquely suited for robust, hot-pluggable industrial backplanes.

Availability

74ALVCH16244DL,112 is available at Aetrix Electronics and suitable for memory subsystem expansion, industrial backplane interfacing, server DIMM presence detection, and ATE signal conditioning requiring stable component supply and long-term lifecycle continuity.

Supply support for 74ALVCH16244DL,112 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Nexperia is a global semiconductor expert delivering high-performance logic, analog, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in industrial, automotive, and computing applications.

The 74ALVCH16244 belongs to Nexperia's advanced low-voltage CMOS logic family, engineered specifically for noise-immune, multi-voltage bus interfacing in space-constrained industrial control and data center infrastructure.

FAQ

Does 74ALVCH16244DL,112 support operation at 1.8 V?

Yes. The device is fully specified from 1.2 V to 3.6 V, with guaranteed performance including VIH/VIL thresholds, propagation delay ≤5.1 ns, and ±24 mA drive at 1.8 V. Bus hold remains active across this full range, and IOFF functions reliably even when VCC drops to 0 V while inputs remain at 1.8 V.

How does the bus hold circuit affect power consumption?

Bus hold draws ≤150 μA per input at VCC = 3.0 V when holding a HIGH or LOW state, and only activates when input voltage is near the switching threshold. In static conditions, total additional ICC is ≤750 μA for all 16 inputs - negligible compared to typical system standby budgets and far less than discrete resistor networks.

Can 74ALVCH16244DL,112 replace 74ALVC16244DGG in existing designs?

Yes, with no layout changes required - identical pinout, timing, and drive capability. The only functional difference is integrated bus hold, which improves robustness on unterminated nets. No firmware or timing adjustments are needed; the bus hold feature is transparent during normal operation and only engages when inputs float.

What is the maximum capacitive load this device can drive reliably?

The datasheet specifies reliable operation into 50 pF loads at 3.3 V with ≤3.0 ns propagation delay. With its ±24 mA drive strength and low output impedance, it can drive heavier loads (e.g., 100 pF) at reduced speed - measured tpd increases to ~4.5 ns at 100 pF, remaining within most 100 MHz bus timing margins.