NXP Semiconductors 74LVCH16244AEV,157

Overview

74LVCH16244AEV,157 from Nexperia is a 16-bit 3-state buffer/line driver with 5 V tolerant inputs and outputs, bus hold on all data inputs, IOFF partial power-down support, and Schmitt-trigger inputs for noise immunity. It operates from 1.2 V to 3.6 V supply and is rated for -40 °C to +125 °C ambient temperature. It serves as a level-translating interface in mixed-voltage industrial control backplanes.

For engineers reviewing the 74LVCH16244AEV,157 datasheet, 74LVCH16244AEV,157 pinout, 74LVCH16244AEV,157 application, or 74LVCH16244AEV,157 equivalent, key selection criteria include 5 V tolerance with 1.2 V–3.6 V core supply, bus hold elimination of external pull-ups, IOFF protection during power sequencing, and TSSOP48 package compatibility with 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-unique to the LVCH variant-eliminating external termination resistors and stabilizing floating inputs without increasing board area or BOM count.

Its IOFF functionality disables outputs when VCC = 0 V, blocking backflow current during partial power-down sequences. Schmitt-trigger inputs accept slow-rising signals (Δt/ΔV up to 20 ns/V at VCC = 1.2 V), enabling reliable interfacing with mechanical switches, legacy TTL outputs, and noisy sensor interfaces.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar buffer/level translation applications.

Compared with 74LVCH16244AEV,157, the 74LVC16244ADGG saves cost but adds BOM complexity, while the SN74LVC16244ADGGR offers alternate sourcing but omits critical bus hold and IOFF features needed for robust industrial deployment.

Availability

74LVCH16244AEV,157 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, and medical diagnostic interface boards requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVCH16244AEV,157 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, discrete, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in industrial, automotive, and consumer applications.

The 74LVCH16244AEV,157 belongs to Nexperia's advanced LVC/LVCH logic family, engineered specifically for robust mixed-voltage interfacing in harsh-environment systems where signal integrity, power sequencing safety, and long-term supply stability are mandatory.

FAQ

What is the maximum operating voltage on the inputs of the 74LVCH16244AEV,157?

The 74LVCH16244AEV,157 supports input voltages up to 5.5 V regardless of VCC level, enabling direct connection to 5 V logic families without clamping diodes or external protection. This 5 V tolerance is guaranteed across the full -40 °C to +125 °C temperature range and applies to all 16 data inputs and 4 output enable pins.

Does the 74LVCH16244AEV,157 have bus hold functionality, and how does it affect system design?

Yes, the 74LVCH16244AEV,157 includes bus hold on all 16 data inputs (1A0–4A3), providing ±75 μA sustaining current at VCC = 3.0 V. This eliminates the need for external pull-up or pull-down resistors on unused inputs, reducing BOM count, PCB footprint, and potential signal integrity issues caused by parasitic capacitance from discrete components.

How does the IOFF feature of the 74LVCH16244AEV,157 protect the system during partial power-down?

The IOFF circuitry in the 74LVCH16244AEV,157 disables all outputs when VCC = 0 V, limiting power-off leakage current to ±20 μA maximum. This prevents damaging backflow current from live 5 V signal lines into an unpowered section of the system-a critical safeguard in hot-pluggable I/O modules and staged power architectures.

What package type is used for the 74LVCH16244AEV,157, and what are its key mechanical attributes?

The 74LVCH16244AEV,157 uses the SOT362-1 (TSSOP48) package: a 48-pin thin shrink small outline with 6.1 mm body width, 0.5 mm lead pitch, and eight GND and four VCC pins for low-noise operation. Its RoHS-compliant, lead-free finish supports standard reflow profiles and meets IPC/JEDEC J-STD-020 moisture sensitivity level 3 requirements.

Can the 74LVCH16244AEV,157 be used in automotive applications, and what qualifications support that use?

Yes, the 74LVCH16244AEV,157 is qualified for operation from -40 °C to +125 °C and meets JEDEC JESD22-A108 reliability standards. While not AEC-Q200 certified, its extended temperature rating, 2000 V HBM ESD robustness, and IOFF protection make it suitable for non-safety-critical automotive body electronics such as door modules and climate control interfaces.