Nexperia USA Inc. 74LVCH16244ADGG,11

Overview

74LVCH16244ADGG,11 from Nexperia is a 16-bit CMOS buffer/line driver with 3-state outputs, four independent output-enable inputs (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 systems in industrial control backplanes and memory expansion modules.

For engineers reviewing the 74LVCH16244ADGG,11 datasheet, 74LVCH16244ADGG,11 pinout, 74LVCH16244ADGG,11 application, or 74LVCH16244ADGG,11 equivalent, key selection criteria include 5 V input/output tolerance, bus hold functionality eliminating external pull-ups, IOFF-enabled safe power sequencing, Schmitt-trigger inputs for slow-edge noise immunity, and TSSOP48 packaging for high-density PCB layouts.

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 circuitry-eliminating external biasing-and Schmitt-trigger action ensures robust operation with slow-rising/falling signals.

The IOFF circuit actively disables outputs when VCC = 0 V, preventing backflow current during partial power-down. Input voltage range extends to 5.5 V regardless of VCC (1.2 V–3.6 V), enabling seamless level translation without external components in heterogeneous logic domains.

Key Specifications

Pinout & Package

TSSOP48 package (SOT362-1), 48-pin plastic thin shrink small outline, 6.1 mm body width, 0.5 mm lead pitch. Pin 1 index marked; lead finish: matte tin.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LVC16244ADGG,11 and SN74ALVC16244DGGR, the 74LVCH16244ADGG,11 uniquely integrates bus hold-reducing component count and improving system-level reliability in uncontrolled input environments-while maintaining full pin and functional compatibility.

Availability

74LVCH16244ADGG,11 is available at Aetrix Electronics and suitable for industrial backplane interfaces, FPGA I/O expansion, and memory expansion modules requiring stable component supply, long-term lifecycle assurance, and guaranteed traceable sourcing.

Supply support for 74LVCH16244ADGG,11 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.

The 74LVCH series targets mixed-voltage system interfacing, emphasizing robustness (IOFF, bus hold, Schmitt inputs), wide VCC range, and industrial temperature operation - designed specifically for reliable signal integrity in complex embedded subsystems.

FAQ

What is the purpose of the bus hold feature on the 74LVCH16244ADGG,11?

The bus hold circuit actively maintains the last valid logic state on each data input (1A0–4A3) when no driving signal is present, drawing ±10 μA to ±500 μA depending on voltage. This eliminates the need for external pull-up or pull-down resistors, reducing BOM cost and PCB space while preventing floating inputs from causing metastability or increased power consumption in unconnected or intermittently driven bus segments.

Can the 74LVCH16244ADGG,11 safely interface a 3.3 V FPGA with a 5 V EEPROM?

Yes. All inputs and outputs are 5 V tolerant up to 5.5 V regardless of VCC (1.2 V–3.6 V), allowing direct connection without level-shifting components. When VCC = 3.3 V, the device drives outputs to VOH ≥ 2.2 V (at –24 mA) and VOL ≤ 0.55 V (at 24 mA), meeting 5 V TTL input thresholds. Inputs accept 0–5.5 V, enabling reliable read/write cycles between the FPGA and EEPROM.

How does the IOFF function protect the device during partial power-down?

When VCC drops to 0 V, the IOFF circuit disables all outputs and isolates them electrically, limiting back-current to ±10 μA maximum. This prevents reverse current flow from powered downstream circuits (e.g., 5 V bus) into the unpowered IC, avoiding latch-up, overheating, or data corruption - critical for hot-swap backplanes, modular power architectures, and systems with staggered rail sequencing.

Is the 74LVCH16244ADGG,11 pin-compatible with the 74LVC16244ADGG,11?

Yes - both share identical TSSOP48 (SOT362-1) pinout, supply voltage range (1.2 V–3.6 V), 5 V tolerant I/O, and functional behavior. The only difference is that the 'H' variant includes bus hold on all data inputs; the standard '74LVC' version does not. No layout changes are needed when upgrading, though external pull-ups may be required if bus hold is relied upon in the design.