Nexperia USA Inc. 74LVT244BDB,112

Overview

74LVT244BDB,112 from Nexperia is a 3.3 V octal buffer/line driver with dual 3-state outputs, designed for high-speed bus interface in mixed-voltage systems. It functions as two independent 4-bit buffers (1A0–1A3/1Y0–1Y3 and 2A0–2A3/2Y0–2Y3), features bus-hold inputs eliminating external pull-ups, supports 5 V-tolerant inputs, and delivers ±64 mA output drive. It is used in industrial control backplanes and FPGA I/O expansion where level-shifting and bus contention control are required.

For engineers reviewing the 74LVT244BDB,112 datasheet, 74LVT244BDB,112 pinout, 74LVT244BDB,112 application, or 74LVT244BDB,112 equivalent, key selection criteria include 3-state enable timing (tPZH ≤ 4.5 ns), overvoltage-tolerant inputs (up to 5.5 V), bus-hold current specs (IBHL = 75–130 μA), and SO20 package thermal performance at −40 °C to +85 °C.

Technical Context

This BiCMOS device implements two independent 4-bit non-inverting buffers, each controlled by an active-low output enable (1OE, 2OE). Its input structure includes integrated bus-hold circuitry that maintains logic state on unused pins without external resistors.

It operates across a wide supply range (2.7 V to 3.6 V), interfaces directly with TTL-level signals, and tolerates 5 V inputs while powered from 3.3 V - enabling seamless interconnection between legacy 5 V logic and modern low-voltage systems.

Key Specifications

Pinout & Package

74LVT244BDB,112 is housed in a plastic small outline package (SO20) per SOT163-1 standard: 20-pin, 7.5 mm body width, 1.27 mm pitch, surface-mountable with gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LVT244BDB,112, the TSSOP variant offers smaller footprint but tighter assembly tolerances, while the TI part sacrifices 5 V tolerance and bus-hold to reduce cost - making the Nexperia SO20 version optimal for industrial backplanes requiring robustness and drop-in compatibility.

Availability

74LVT244BDB,112 is available at Aetrix Electronics and suitable for industrial backplane interfaces, FPGA I/O expansion, automated test equipment fixtures, and communications module control planes requiring stable component supply across extended temperature ranges.

Supply support for 74LVT244BDB,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 specializing in high-performance, reliable discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74LVT series targets high-speed, low-voltage bus interface applications - engineered for robust mixed-signal interoperability, ESD resilience, and industrial-grade thermal stability.

FAQ

What is the maximum input voltage the 74LVT244BDB,112 can tolerate?

The device accepts input voltages up to +5.5 V regardless of VCC level, verified per datasheet Table 4 (VI max = +7.0 V with clamp current observed). This allows direct interfacing with 5 V logic families while operating from a 3.3 V supply, eliminating external level-shifting components in mixed-voltage systems.

Does the 74LVT244BDB,112 require external pull-up resistors on unused inputs?

No. The device integrates bus-hold circuitry on all data inputs (1A0–1A3, 2A0–2A3), with IBHL = 75–130 μA at 3 V, actively maintaining valid logic states without external components. This reduces bill-of-materials cost and PCB real estate versus standard 74-series buffers.

How does the 74LVT244BDB,112 behave during power-up?

It features power-up 3-state functionality: outputs remain in high-impedance until VCC reaches a stable operating level, preventing bus contention during power sequencing. This is confirmed in Section 2 (Features and benefits) and validated by IOZ ≤ −5 μA in Table 6 under power-up conditions.

Can the 74LVT244BDB,112 be used in hot-swap applications?

Yes. Its IOFF circuitry limits power-off leakage to ±100 μA when VCC = 0 V and inputs/outputs are biased from external sources (Table 6), enabling safe live insertion and extraction in backplane systems - a feature explicitly cited in Section 2 of the datasheet.