Nexperia USA Inc. 74LVC16244ADL,112

Overview

74LVC16244ADL,112 from Nexperia is a 16-bit non-inverting 3-state buffer/line driver in TSSOP48 (SOT362-1) package, operating from 1.2 V to 3.6 V supply, with 5 V tolerant inputs/outputs, IOFF partial power-down protection, and Schmitt-trigger inputs for noise immunity. It supports mixed-voltage interfacing between 3.3 V and 5 V logic domains in industrial bus buffering applications.

For engineers reviewing the 74LVC16244ADL,112 datasheet, 74LVC16244ADL,112 pinout, 74LVC16244ADL,112 application, or 74LVC16244ADL,112 equivalent, this device is selected for high-density bidirectional bus isolation, level translation in legacy-to-modern logic interfaces, and noise-immune signal conditioning where low static current and guaranteed high-impedance shutdown are required.

Technical Context

The device implements four independent 4-bit buffer sections (1A–4A → 1Y–4Y), each controlled by its own active-low output enable (1OE–4OE). Each section drives four outputs simultaneously with rail-to-rail CMOS-compatible swing and supports simultaneous enable/disable of subsets of the 16-bit bus.

IOFF circuitry disables all outputs when VCC = 0 V, blocking backflow current during hot-insertion or partial system power-down. Schmitt-trigger inputs provide hysteresis (typically 0.3 V at VCC = 3.3 V), enabling reliable operation with slow-rising signals from mechanical switches or long traces.

Key Specifications

Pinout & Package

TSSOP48 (SOT362-1) package: 48-pin plastic thin shrink small outline, 6.1 mm body width, 0.5 mm lead pitch, exposed pad not present. Pin 1 index marked via notch or dot; pins numbered counterclockwise from top-left corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LVCH16244ADL,112, the bus-hold variant adds input stability at no timing or power cost; versus SN74LVC16244ADGGR, the Nexperia part offers broader VCC flexibility down to 1.2 V and tighter industrial temp grading, making it preferable for ultra-low-voltage or extended-temperature deployments.

Availability

74LVC16244ADL,112 is available at Aetrix Electronics and suitable for industrial PLC backplane buffering, legacy ISA bus signal conditioning, and automated test equipment channel isolation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVC16244ADL,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 focused on high-volume, high-reliability logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.

This device belongs to the 74LVC family of advanced low-voltage CMOS logic ICs designed specifically for robust mixed-voltage interfacing, low-power operation, and industrial-grade reliability in space-constrained PCB layouts.

FAQ

What is the maximum clock frequency supported by the 74LVC16244ADL,112?

The device has no internal clock; it is an asynchronous buffer. Its usable data rate depends on propagation delay (1.1–5.5 ns at VCC = 3.0–3.6 V) and system setup/hold timing. With 2 ns typical tpd and 1 ns margin, it reliably supports 100+ MHz toggle rates on short, well-terminated traces.

Can the 74LVC16244ADL,112 drive a 50 Ω transmission line directly?

No. Its output drive strength (24 mA sink/source at VCC = 3.0 V) corresponds to ~125 Ω effective impedance - insufficient for direct 50 Ω termination. Use series source termination (e.g., 33 Ω resistor at driver output) or external line drivers for controlled-impedance routing.

Does the 74LVC16244ADL,112 require external pull-up or pull-down resistors on unused inputs?

No - unused inputs may be left floating only if the variant is 74LVCH16244ADL,112 (with bus hold). The 74LVC16244ADL,112 lacks bus hold; all unused inputs must be tied to VCC or GND to prevent oscillation and excess current draw due to indeterminate logic states.

How does IOFF protection behave during partial power-down of a multi-rail system?

When VCC drops to 0 V while inputs remain at 5 V, IOFF circuitry activates automatically, forcing all outputs into high-impedance state and limiting reverse current to ≤±10 μA. This prevents back-driving powered rails and avoids latch-up in interconnected logic blocks during uncontrolled power sequencing.