Nexperia USA Inc. 74LVTH244APW-Q100J

Overview

74LVTH244APW-Q100 from Nexperia is an AEC-Q100 Grade 3 qualified 3.3 V octal 3-state buffer/line driver in TSSOP20 package, featuring dual output enables (1OE, 2OE), ±64 mA/–32 mA drive capability, and overvoltage-tolerant inputs up to 5.5 V - used for automotive bus interfacing and level translation between 3.3 V logic and 5 V buses.

For engineers reviewing the 74LVTH244APW-Q100 datasheet, 74LVTH244APW-Q100 pinout, 74LVTH244APW-Q100 application, or 74LVTH244APW-Q100 equivalent, key selection criteria include automotive qualification status, bus-hold input retention, IOFF partial power-down behavior, and propagation delays under 4.1 ns at 3.3 V.

Technical Context

This BiCMOS octal buffer implements two independent 4-bit groups, each controlled by a dedicated active-low output enable (1OE for Y0–Y3, 2OE for Y0–Y3), enabling selective bus isolation. Inputs tolerate 5.5 V while operating from 2.7–3.6 V VCC, allowing direct TTL-level interfacing without level shifters.

The device integrates bus-hold circuitry on all data inputs (1A0–1A3, 2A0–2A3) to maintain last-valid logic state when un-driven, eliminating external pull-up resistors. IOFF functionality ensures near-zero leakage (<±100 µA) during power-down, preventing back-driving of powered-down buses.

Key Specifications

Pinout & Package

TSSOP20 (SOT360-1) package: 20-pin thin shrink small outline, 4.4 mm body width, 0.65 mm pitch, lead-free and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC244APWR, the 74LVTH244APW-Q100 adds automotive qualification, bus-hold, and IOFF - critical for ECU safety integrity. Versus 74LVTH244ABQ-Q100, it trades smaller footprint for easier hand-soldering and standard TSSOP rework compatibility.

Availability

74LVTH244APW-Q100 is available at Aetrix Electronics and suitable for automotive instrument clusters, ADAS camera interfaces, engine control unit diagnostics, and infotainment head units requiring stable component supply across extended temperature and lifecycle requirements.

Supply support for 74LVTH244APW-Q100 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 components for automotive, industrial, and consumer markets, with leadership in logic, MOSFETs, and ESD protection.

This device belongs to Nexperia's automotive-qualified LVT/LVTH logic family, engineered specifically for robust 3.3 V bus interfacing in harsh automotive environments where signal integrity, power sequencing, and long-term reliability are mandatory.

FAQ

What is the maximum input voltage the 74LVTH244APW-Q100 can safely tolerate?

The device supports input voltages up to +5.5 V regardless of VCC level, verified per datasheet Table 4 (Limiting Values). This overvoltage tolerance applies to all data and enable inputs (1A0–1A3, 2A0–2A3, 1OE, 2OE) and enables direct interfacing with 5 V systems without external protection components.

Does the 74LVTH244APW-Q100 require external pull-up resistors on unused inputs?

No. All eight data inputs feature integrated bus-hold circuitry (IBHL/IBHH ±75 µA min), which actively maintains the last valid logic state when inputs float. This eliminates the need for external pull-up or pull-down resistors, reducing BOM count and board area in automotive designs.

How does the IOFF function behave during power-down sequences?

When VCC = 0 V, IOFF limits input/output leakage to ±100 µA maximum (Table 6), preventing current backflow from live 5 V buses into unpowered circuitry. This protects downstream logic and enables safe power-gating in multi-rail automotive ECUs without risk of latch-up or unintended activation.

Can the 74LVTH244APW-Q100 drive a 5 V bus while operating from 3.3 V VCC?

Yes - the outputs are designed to drive 5 V buses directly. When enabled and sinking current, outputs reach VOL ≤ 0.55 V at 64 mA (Table 6); when sourcing, VOH ≥ 2.0 V at –32 mA. The 5.5 V input tolerance also allows receiving 5 V signals while powered from 3.3 V.