Nexperia USA Inc. 74LVT244BD,112

Overview

74LVT244BD,112 from Nexperia is a 3.3 V octal 3-state buffer/line driver in SO20 package, featuring dual independent 4-bit output enables (1OE, 2OE), ±32 mA/±64 mA drive capability, bus hold inputs eliminating external pull-ups, and 5.5 V overvoltage-tolerant inputs. It operates from -40 °C to +85 °C and interfaces directly with TTL and 5 V systems in backplane or bus interface applications.

For engineers reviewing the 74LVT244BD,112 datasheet, 74LVT244BD,112 pinout, 74LVT244BD,112 application, or 74LVT244BD,112 equivalent, key selection criteria include 3-state timing (tPZH ≤ 4.5 ns), dual OE control granularity, bus hold current specs (IBHL = 75–130 μA), and SO20 thermal performance under industrial ambient conditions.

Technical Context

This BiCMOS device implements two independent 4-bit non-inverting buffers with active-low 3-state outputs, enabling flexible partitioning of an 8-bit data path. Each group (1Y0–1Y3 and 2Y0–2Y3) is controlled by its own enable (1OE, 2OE), allowing selective bus isolation without affecting the other channel.

Bus hold circuitry actively maintains logic states on unused inputs at VIH ≥ 2.0 V or VIL ≤ 0.8 V, eliminating floating nodes and external biasing. IOFF protection ensures sub-100 μA power-down leakage when VCC = 0 V, supporting live insertion and partial system power-down modes.

Key Specifications

Pinout & Package

74LVT244BD,112 is housed in a plastic small outline package (SO20, SOT163-1) with 20 leads and 7.5 mm body width. The package supports standard reflow profiles and provides adequate thermal dissipation for continuous operation at full drive strength.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal 3-state buffer applications.

Compared with 74LVT244BPW,118, the 74LVT244BD,112 offers superior thermal mass and mechanical robustness in SO20, while SN74LVC244APWR trades drive strength and bus hold for lower static current - making it unsuitable for direct replacement in 5 V mixed-signal or high-fanout environments.

Availability

74LVT244BD,112 is available at Aetrix Electronics and suitable for industrial backplane interfaces, memory-mapped I/O expansion, hot-swappable module interconnects, and legacy system bus bridging requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVT244BD,112 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-performance, reliable logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74LVT series delivers high-speed BiCMOS logic optimized for 3.3 V systems with 5 V tolerance, targeting robust bus interface and signal conditioning in industrial control and communications infrastructure.

FAQ

What is the maximum clock frequency supported by the 74LVT244BD,112 in a data bus application?

The device does not operate as a clocked element but as a combinatorial buffer. Its 3.5 ns max propagation delay (tPLH/tPHL) supports data rates up to ~285 MHz for single-cycle transfers on a parallel bus, assuming setup/hold margins and PCB trace delays are managed. Actual usable frequency depends on system-level timing closure, not internal clocking.

Can the 74LVT244BD,112 safely drive a 5 V bus while powered from 3.3 V?

Yes - its inputs are overvoltage tolerant to 5.5 V, and outputs can source/sink current into 5 V rails when enabled. However, output HIGH voltage (VOH) is limited to ~2.0 V at –32 mA, so it cannot actively drive a 5 V logic HIGH; it functions as a bus keeper or sink-only node unless used with pull-up resistors on the 5 V side.

How does the bus hold feature affect power consumption in unused input configurations?

Bus hold draws 75–130 μA per LOW input and –75 to –140 μA per HIGH input at VCC = 3 V. For all eight inputs held, total added current is under 1.1 mA - significantly less than typical 4.7 kΩ pull-up resistors (≈1 mA each), and eliminates resistor heat and placement overhead.

Is the 74LVT244BD,112 qualified for automotive applications?

No - this part is specified for industrial temperature range (–40 °C to +85 °C) and carries no AEC-Q100 qualification. Nexperia explicitly states non-automotive qualification in its legal disclaimers; automotive use requires explicit AEC-qualified variants such as the 74LVT244B-Q100 series.