Nexperia USA Inc. 74LVT244AD,118

Overview

74LVT244AD,118 from Nexperia is a 3.3 V octal buffer/line driver with dual 3-state outputs, designed for high-speed bus interface in industrial and telecom backplanes. It features two independent output enables (1OE, 2OE), ±64 mA/−32 mA drive capability, 2.7–3.6 V supply range, and overvoltage-tolerant inputs up to 5.5 V. Used as an 8-bit or dual 4-bit buffer, it supports live insertion and eliminates external pull-ups via integrated bus hold.

For engineers reviewing the 74LVT244AD,118 datasheet, 74LVT244AD,118 pinout, 74LVT244AD,118 application, or 74LVT244AD,118 equivalent, key selection criteria include 3-state timing (tPZH ≤ 5.2 ns), bus-hold current (IBHL = 75–150 μA), IOFF power-down behavior, and SO20 package compatibility with legacy 74-series footprints.

Technical Context

This BiCMOS device implements two independent 4-bit non-inverting buffers, each controlled by a dedicated active-low output enable (1OE for Y0–Y3, 2OE for Y4–Y7). Its IOFF circuitry ensures low leakage (<±100 μA) during partial power-down, while bus-hold inputs maintain valid logic states on unused pins without external resistors.

Dynamic performance is optimized for 3.3 V operation: typical propagation delays are tPLH/tPHL = 2.5/2.6 ns at VCC = 3.3 V, with 3-state enable/disable times tPZH/tPLZ ≤ 5.6 ns. Input transition rate tolerance (≤10 ns/V) and 5.5 V-tolerant inputs allow direct interfacing with 5 V TTL buses without level shifters.

Key Specifications

Pinout & Package

74LVT244AD,118 is packaged in SO20 (SOT163-1), a plastic small outline package with 20 leads and 7.5 mm body width. Pin 1 is marked by a notch or dot; the package is lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LVTH244AD,118, the original offers lower power consumption in high-Z states and sufficient sink drive for most 3.3 V systems; versus SN74LVC244APWR, it provides superior robustness via bus hold and true power-down isolation without design compromises.

Availability

74LVT244AD,118 is available at Aetrix Electronics and suitable for industrial backplane interface, telecom line card buffering, and embedded controller I/O expansion requiring stable component supply and long-term manufacturability.

Supply support for 74LVT244AD,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, reliable, and energy-efficient logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74LVT series targets high-speed, low-voltage bus interface applications where timing precision, drive strength, and mixed-voltage interoperability are critical - especially in telecom infrastructure and programmable logic interconnects.

FAQ

What is the maximum clock frequency supported by the 74LVT244AD,118?

The device does not operate as a clocked element but as a combinatorial buffer. Its usable data rate is determined by propagation delay (≤4.1 ns) and load capacitance. With 50 pF load and 3.3 V supply, it reliably supports data toggling up to 100 MHz (10 ns period), assuming proper PCB layout and termination.

Can 74LVT244AD,118 be used with a 5 V microcontroller output?

Yes - its inputs tolerate up to 5.5 V regardless of VCC level. When VCC = 3.3 V, a 5 V input is safely clamped and interpreted correctly (VIH ≥ 2.0 V). No external protection is needed, making it ideal for interfacing 5 V legacy controllers to 3.3 V subsystems.

Does the SO20 package (SOT163-1) support reflow soldering?

Yes - the 74LVT244AD,118 in SO20 package is qualified for standard lead-free reflow profiles (J-STD-020). Peak temperature must not exceed 260 °C for ≤60 seconds; preheat ramp rate ≤3 °C/s and time above 217 °C should be 60–150 seconds.

How does bus hold functionality behave during power-up?

Bus hold activates immediately upon VCC reaching ~1.5 V and remains functional through full operating range. During power-up, it prevents floating inputs from oscillating or drifting, eliminating glitches that could trigger unintended outputs before firmware initializes the OE pins.