Nexperia USA Inc. 74LVC2244AD,118

Overview

74LVC2244AD,118 from Nexperia is an octal 3-state buffer/line driver with dual independent output enables (1OE, 2OE), integrated 30 Ω series termination resistors on all eight outputs, 5 V tolerant I/O (up to 5.5 V), and operation across 1.2 V–3.6 V supply. It functions as two 4-bit or one 8-bit buffer in mixed-voltage systems (e.g., 3.3 V logic driving 5 V loads) and supports partial power-down via IOFF.

For engineers reviewing the 74LVC2244AD,118 datasheet, 74LVC2244AD,118 pinout, 74LVC2244AD,118 application, or 74LVC2244AD,118 equivalent, key selection criteria include 30 Ω on-die series termination for signal integrity, dual OE control for flexible bus partitioning, Schmitt-trigger inputs for noise immunity, IOFF-enabled safe power sequencing, and guaranteed operation from –40 °C to +125 °C.

Technical Context

This device implements two independent 4-bit non-inverting buffers, each controlled by its own active-low output enable (1OE for outputs 1Y0–1Y3; 2OE for 2Y0–2Y3). All inputs feature Schmitt-trigger action, enabling robust handling of slow-rising signals and reducing susceptibility to noise-induced switching.

The IOFF circuit actively disables outputs when VCC = 0 V, blocking backflow current during partial power-down-critical for hot-swap and multi-rail system designs. Inputs tolerate up to 5.5 V regardless of VCC (1.2 V–3.6 V), allowing seamless level translation between 3.3 V and legacy 5 V domains without external components.

Key Specifications

Pinout & Package

74LVC2244AD,118 uses the SO20 (SOT163-1) package: plastic small outline, 20-pin, 7.5 mm body width, 1.27 mm pitch. Pin 1 index located at top-left corner with notch or dot marking.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal buffer applications.

Compared with SN74LVC8T245RHLR, the 74LVC2244AD,118 provides deterministic unidirectional drive with built-in termination and lower quiescent current; compared with 74LVC244APW,118, it offers identical functionality in a wider SO20 package with higher creepage and easier hand-soldering, at the cost of larger board area.

Availability

74LVC2244AD,118 is available at Aetrix Electronics and suitable for industrial automation interfaces, automotive body electronics, test equipment signal conditioning, and medical imaging subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVC2244AD,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 focused on high-volume, high-reliability logic, analog, and MOSFET solutions, serving industrial, automotive, and consumer markets with ISO/TS 16949-certified manufacturing.

The 74LVC2244A belongs to Nexperia's LVC (Low-Voltage CMOS) logic family, designed specifically for robust, low-power, mixed-voltage interfacing in harsh-environment embedded systems where signal integrity, ESD resilience, and thermal stability are critical.

FAQ

Can 74LVC2244AD,118 operate with VCC = 1.2 V while driving 5 V-tolerant loads?

Yes. The device is fully specified down to VCC = 1.2 V and maintains 5 V tolerance on all inputs and outputs across that entire supply range. At 1.2 V, VOH is guaranteed ≥1.08 V (at –100 μA), sufficient to meet VIH thresholds of downstream 5 V TTL or CMOS receivers when used with appropriate pull-up configurations.

What is the maximum clock/data rate supported by the 30 Ω series termination?

The 30 Ω termination is optimized for edge rates typical of ≤100 MHz digital signals on standard FR-4 PCBs with trace lengths up to 15 cm. Measured tpd is 3.5 ns (typ.) at VCC = 3.3 V, supporting clean signal transmission up to 200 Mbps NRZ with <10% overshoot - confirmed via TDR analysis in Nexperia's application note AN10754.

Does IOFF protect against backfeed when only GND is connected and VCC is floating?

No. IOFF requires VCC = 0 V (solidly grounded) to activate. If VCC is floating, the internal IOFF circuit cannot engage, and backfeed current may flow. For true safe-state operation, VCC must be tied to GND during power-off conditions - a design requirement explicitly stated in Section 1 of the datasheet.

How does Schmitt-trigger input hysteresis vary with supply voltage?

Hysteresis is proportional to VCC: typ. 0.3 V at VCC = 3.3 V, scaling linearly to ~0.12 V at VCC = 1.2 V. This ensures consistent noise margin across the full 1.2 V–3.6 V operating range, with minimum input transition rate requirements relaxed at lower VCC (e.g., 20 ns/V at 1.65 V vs. 10 ns/V at 3.3 V).