Nexperia USA Inc. 74LVTH244ABQ,115

Overview

74LVTH244ABQ,115 from Nexperia is a 3.3 V octal 3-state buffer/line driver in DHVQFN20 package, featuring dual independent 4-bit channels with active-low 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 serves as a level-translating I/O interface in high-density FPGA/CPU peripheral buses.

For engineers reviewing the 74LVTH244ABQ,115 datasheet, 74LVTH244ABQ,115 pinout, 74LVTH244ABQ,115 application, or 74LVTH244ABQ,115 equivalent, key selection criteria include 3-state timing (tPZH ≤ 5.2 ns), bus hold current (IBHL = 75–150 μA), supply range (2.7–3.6 V), and thermal-enhanced QFN packaging for board space-constrained digital systems.

Technical Context

This BiCMOS device implements two independent 4-bit non-inverting buffers, each controlled by its own active-low enable (1OE for Y0–Y3 group, 2OE for Y0–Y3 of second bank). Output states are HIGH, LOW, or high-impedance OFF-enabling bidirectional bus sharing without contention.

Bus hold circuitry actively maintains logic state on unused inputs at VIH ≥ 2.0 V or VIL ≤ 0.8 V, eliminating external biasing. IOFF protection ensures near-zero leakage (< ±100 μA) during partial power-down, supporting hot-plug operation in live-insertion systems.

Key Specifications

Pinout & Package

DHVQFN20 (SOT764-1) package: 2.5 × 4.5 × 0.85 mm body, no leads, thermally enhanced exposed pad (GND-connected recommended), 20-terminal quad layout with terminal 1 index area.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC244APWR and 74ALVC244BQ,115, the 74LVTH244ABQ,115 uniquely combines bus hold, IOFF, and 5.5 V tolerance in a thermally optimized QFN-making it the sole choice for hot-pluggable, mixed-voltage, or high-reliability industrial bus interfaces.

Availability

74LVTH244ABQ,115 is available at Aetrix Electronics and suitable for FPGA I/O expansion, industrial PLC backplane buffering, and embedded CPU memory address latching requiring stable component supply across long production lifecycles.

Supply support for 74LVTH244ABQ,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, discrete, and MOSFET solutions with focus on efficiency, reliability, and miniaturization for industrial, automotive, and computing markets.

The 74LVTH series targets high-speed, low-voltage digital interfacing where robustness, bus integrity, and thermal performance are critical-designed specifically for dense PCB layouts and mixed-signal system integration.

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 PCB copper pour tied to system ground to achieve specified junction-to-board thermal resistance (θ_JB). Leaving it unconnected degrades thermal performance and may cause premature failure under sustained load.

Can 74LVTH244ABQ,115 safely drive a 5 V bus while operating at 3.3 V VCC?

Yes. Its outputs are designed for "no bus current loading when tied to 5 V bus" per datasheet Section 2. When disabled (OE HIGH), outputs enter high-impedance state with IOZ ≤ –1 μA at VO = 5.5 V. When enabled and driving LOW, VOL ≤ 0.55 V at 64 mA ensures solid logic LOW even with 5 V pull-ups.

How does bus hold eliminate external pull-up resistors?

Internal weak feedback transistors maintain the last-valid logic state on each input. At VCC = 3 V, IBHL = 75–150 μA holds LOW and IBHH = –75 to –150 μA holds HIGH-providing sufficient current to overcome typical PCB leakage (<1 μA) and noise margins without external components.

Is the 74LVTH244ABQ,115 suitable for automotive applications?

No. This device is not AEC-Q100 qualified and lacks automotive-grade screening, temperature range (–40 °C to +85 °C is industrial, not automotive), or fault coverage. Nexperia explicitly states non-automotive qualification in Section 14 of the datasheet; use only in industrial, computing, or communications equipment.