NXP Semiconductors 74LVCH16244AEV,118

Overview

74LVCH16244AEV,118 from Nexperia is a 16-bit non-inverting 3-state buffer/line driver with bus-hold inputs, 1.2 V to 3.6 V supply operation, 5 V tolerant I/O, and IOFF partial power-down protection. It supports mixed-voltage translation between 3.3 V and 5 V logic domains and is rated for -40 °C to +125 °C operation in TSSOP48 packaging. It serves as a level-shifting interface in industrial control backplanes and FPGA I/O expansion.

For engineers reviewing the 74LVCH16244AEV,118 datasheet, 74LVCH16244AEV,118 pinout, 74LVCH16244AEV,118 application, or 74LVCH16244AEV,118 equivalent, key selection criteria include bus-hold functionality on all data inputs, 5 V tolerance without external clamping, IOFF-enabled safe power sequencing, and guaranteed 4.1 ns max propagation delay at 3.3 V.

Technical Context

This device implements four independent 4-bit buffer sections (1A–4A → 1Y–4Y), each controlled by its own active-low output enable (1OE–4OE). Schmitt-trigger inputs tolerate slow-rising signals, while bus-hold circuitry maintains stable logic states on unused inputs without external pull-ups - a feature exclusive to the LVCH variant.

The IOFF circuit actively disables outputs when VCC = 0 V, blocking damaging backflow current during partial power-down. All 48-pin TSSOP packages support JEDEC-compliant voltage standards (JESD8-7A, JESD8-5A, JESD8-C/JESD36) and meet HBM ESD >2000 V and CDM >1000 V requirements.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LVCH16244AEV,118, the 74LVC16244ADGG omits bus-hold (increasing BOM and layout complexity), while SN74LVC16244ADGGR lacks both bus-hold and IOFF - limiting use in hot-swap or multi-rail systems where power sequencing matters.

Availability

74LVCH16244AEV,118 is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, FPGA-based prototyping, and test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVCH16244AEV,118 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 high-volume applications.

The 74LVCH16244AEV,118 belongs to Nexperia's LVC/LVCH advanced logic family, engineered for low-voltage mixed-signal interfacing in automotive, industrial, and computing systems demanding robust voltage translation and power-aware design.

FAQ

What is the function of the bus-hold circuit in the 74LVCH16244AEV,118?

The bus-hold circuit in the 74LVCH16244AEV,118 actively maintains the last valid logic state on each data input (1A0–4A3) when left un-driven, drawing ±75 μA at 3.0 V. This eliminates the need for external pull-up or pull-down resistors, reducing component count and PCB area - a feature absent in the standard 74LVC16244A variant.

Does the 74LVCH16244AEV,118 support partial power-down operation?

Yes, the 74LVCH16244AEV,118 incorporates IOFF circuitry that disables all outputs and blocks backflow current when VCC = 0 V. This allows safe insertion/removal in live backplanes and supports staggered power sequencing in multi-rail systems - a key differentiator versus non-IOFF logic buffers.

What is the maximum propagation delay for the 74LVCH16244AEV,118 at 3.3 V supply?

At VCC = 3.3 V and ambient temperature ≤ +85 °C, the 74LVCH16244AEV,118 guarantees a maximum propagation delay (tpd) of 4.1 ns from input to output. At +125 °C, this increases to 5.5 ns - fully specified and tested per JEDEC standards for industrial and automotive use cases.

Can the 74LVCH16244AEV,118 interface directly with 5 V TTL devices?

Yes, the 74LVCH16244AEV,118 features 5 V tolerant inputs and outputs, allowing direct connection to 5 V TTL or CMOS devices without level-shifting components. Its VIH/VIL thresholds scale with VCC, and it tolerates up to 5.5 V on any I/O pin - verified across the full -40 °C to +125 °C operating range.

Which package type does the 74LVCH16244AEV,118 use, and what are its mechanical dimensions?

The 74LVCH16244AEV,118 uses the SOT362-1 (TSSOP48) package: 48-lead plastic thin shrink small outline with 6.1 mm body width, 0.5 mm lead pitch, and 1.2 mm max height. Pin 1 index is marked by a notch; thermal pad is not present - consistent with Nexperia's standard TSSOP footprint for reflow compatibility.