NXP Semiconductors 74LVT241BQ,115

Overview

74LVT241BQ,115 from Nexperia is a 3.3 V octal 3-state buffer/line driver in DHVQFN20 package, featuring dual independent output enables (1OE active LOW, 2OE active HIGH), ±64 mA/–32 mA drive capability, and bus-hold inputs eliminating external pull-ups. It interfaces 3.3 V logic with 5 V buses and is used in high-speed data bus driving applications in industrial control backplanes and embedded computing systems.

For engineers reviewing the 74LVT241BQ,115 datasheet, 74LVT241BQ,115 pinout, 74LVT241BQ,115 application, or 74LVT241BQ,115 equivalent, key selection criteria include 3-state timing (tPZH ≤ 5.2 ns), dual OE control architecture, bus-hold input current (IBHL = 75–150 μA), and thermal-enhanced DHVQFN20 package suitability for space-constrained PCB layouts.

Technical Context

This BiCMOS octal buffer implements two independent 4-bit 3-state output groups-Group 1 (1A0–1A3 → 1Y0–1Y3, controlled by 1OE) and Group 2 (2A0–2A3 → 2Y0–2Y3, controlled by 2OE). Each group supports TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) and operates across –40 °C to +85 °C.

Its bus-hold circuitry maintains stable logic states on unused inputs without external resistors, and power-up 3-state behavior prevents bus contention during system initialization. The device meets JESD78 Class II latch-up immunity (>500 mA) and JEDEC JS-001/JS-002 ESD ratings (HBM >2000 V, CDM >1000 V).

Key Specifications

Pinout & Package

DHVQFN20 (SOT764-1) package: 2.5 × 4.5 × 0.85 mm body, no leads, thermally enhanced exposed pad (GND-connected per design guidance), 20 terminals in quad arrangement with terminal 1 index area marked.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC241PWR and 74ALVC244D, the 74LVT241BQ,115 uniquely combines 5 V-tolerant inputs, asymmetric OE polarity, and integrated bus-hold - making it irreplaceable in mixed-voltage industrial backplanes where reliability under floating-input conditions is non-negotiable.

Availability

74LVT241BQ,115 is available at Aetrix Electronics and suitable for industrial backplane interfaces, embedded CPU data bus extensions, automated test equipment signal routing, and network switch control plane interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVT241BQ,115 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, analog, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in industrial, automotive, and consumer applications.

The 74LVT series targets high-speed, low-power bus interface applications in mixed-voltage systems, emphasizing robustness against ESD, latch-up, and thermal stress in demanding real-world deployments.

FAQ

What is the function of the exposed thermal pad on the DHVQFN20 package?

The exposed pad (terminal 1 index area) is electrically connected to GND and serves as the primary thermal path. It must be soldered to a dedicated GND copper pour on the PCB to maintain junction temperature below 150 °C under full 64 mA output load. Leaving it unsoldered or floating violates thermal specifications and risks premature failure.

Can 74LVT241BQ,115 safely drive a 5 V bus while powered from 3.3 V?

Yes - its inputs are 5 V tolerant (VI up to 5.5 V), and outputs can source/sink current into 5 V bus lines without damage. However, output HIGH voltage (VOH) is limited to ~2.2 V at –32 mA, so it cannot assert a full 5 V logic HIGH; it is intended for driving 5 V-tolerant inputs, not powering 5 V loads.

How does the bus-hold feature behave when an input is pulled to 2.0 V?

At VI = 2.0 V, the bus-hold circuit asserts IBHH = –75 to –150 μA, actively pulling the input toward VCC to reinforce a HIGH state. This prevents metastability near the TTL threshold and eliminates need for external biasing - critical for unconnected strap pins in FPGA/CPU configurations.

Why do 1OE and 2OE have opposite active polarities?

The asymmetry enables direct connection to different control sources: 1OE (active LOW) interfaces cleanly with standard decoder outputs or open-drain drivers, while 2OE (active HIGH) connects directly to GPIO pins without inverters. This simplifies timing-critical bus arbitration in multi-controller systems where one controller asserts while another releases.