Nexperia USA Inc. 74LVCH16244ABX,518

Overview

74LVCH16244ABX,518 from Nexperia is a 16-bit CMOS buffer/line driver with 3-state outputs, four independent output enables (1OE–4OE), 5 V tolerant I/O, bus hold on all data inputs, and IOFF partial power-down protection. It operates from 1.2 V to 3.6 V supply and supports mixed-voltage interfacing between 3.3 V and 5 V logic domains in industrial control backplanes.

For engineers reviewing the 74LVCH16244ABX,518 datasheet, 74LVCH16244ABX,518 pinout, 74LVCH16244ABX,518 application, or 74LVCH16244ABX,518 equivalent, key selection factors include its 48-pin TSSOP package, bus-hold functionality eliminating external pull-ups, Schmitt-trigger inputs for noise immunity, IOFF current blocking at VCC = 0 V, and guaranteed operation up to +125 °C.

Technical Context

This device implements four independent 4-bit non-inverting buffers, each controlled by a dedicated active-low output enable (1OE–4OE). All 16 data inputs feature integrated bus-hold circuits, sustaining logic states without external resistors - a critical advantage in high-density PCB layouts with floating inputs.

Its IOFF circuitry actively disables outputs and blocks reverse current when VCC = 0 V, enabling hot-insertion and partial power-down in multi-rail systems. Schmitt-trigger inputs ensure robust operation with slow-rising signals, while 5 V tolerance allows direct connection to legacy TTL or 5 V microcontrollers without level-shifting.

Key Specifications

Pinout & Package

74LVCH16244ABX,518 is housed in a 48-pin TSSOP package (SOT1134-2), 12.6 mm × 6.2 mm body, 0.5 mm lead pitch, with exposed thermal pad. Pin numbering follows standard dual-row layout with pin 1 index marker at top-left corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LVCH16244ABX,518, the 74LVC16244ADGG lacks bus hold - increasing component count and risk of floating inputs - while the SN74LVCH16244ADGGR trades extended temperature capability for TI ecosystem compatibility.

Availability

74LVCH16244ABX,518 is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, test equipment signal conditioning, and medical diagnostic data acquisition requiring stable component supply across extended temperature ranges.

Supply support for 74LVCH16244ABX,518 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 essential efficiency technologies, delivering high-performance logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74LVCH16244ABX,518 belongs to Nexperia's advanced LVC/LVCH logic family, engineered specifically for robust mixed-voltage interfacing, low-power operation, and extended-temperature reliability in mission-critical embedded systems.

FAQ

Does 74LVCH16244ABX,518 support hot-swap insertion?

Yes. Its IOFF circuitry actively disables outputs and blocks reverse current when VCC = 0 V, preventing damage during live insertion into powered backplanes. This behavior is verified per JEDEC JESD78 and confirmed in the datasheet's limiting values table (IOFF ≤ ±20 μA at VCC = 0 V).

Can unused inputs be left floating?

No - but they require no external components. All 16 data inputs feature integrated bus-hold circuits that maintain the last-valid logic state. This eliminates floating inputs without pull-up or pull-down resistors, as specified in Table 6 (IBHL/IBHH parameters) and Figure 3 of the datasheet.

What is the maximum clock/data rate supported?

The device does not operate on a clock; it is asynchronous. Propagation delay is 1.1 ns (min) to 5.5 ns (max) at VCC = 3.0–3.6 V, supporting reliable data transfer up to ~100 MHz for 16-bit parallel buses with proper layout and load capacitance ≤50 pF, per Table 9 test conditions.

Is this part qualified for automotive applications?

Yes. The 74LVCH16244ABX,518 is rated for −40 °C to +125 °C operation and meets AEC-Q100 stress testing requirements for Grade 1 automotive components, as documented in Nexperia's official product qualification reports and ordering information (Table 1, temperature range column).