Nexperia USA Inc. 74LV244ATPWJ

Overview

74LV244ATPWJ from Nexperia is an octal 3-state buffer/line driver with TTL-compatible inputs, dual active-low output enables (1OE, 2OE), 2.8 ns typical propagation delay at 5 V, ±35 mA output drive capability, and IOFF partial power-down protection. It operates from 4.5 V to 5.5 V and supports mixed-mode voltage translation between 3.3 V logic and 5 V bus systems in industrial control backplanes.

For engineers reviewing the 74LV244ATPWJ datasheet, 74LV244ATPWJ pinout, 74LV244ATPWJ application, or 74LV244ATPWJ equivalent, key selection criteria include 3-state timing skew (<1 ns), Schmitt-trigger input tolerance for slow edges, IOFF leakage <0.5 μA at VCC = 0 V, and TSSOP20 thermal derating above 100 °C.

Technical Context

This device implements two independent 4-bit buffered groups (1A0–1A3 → 1Y0–1Y3 and 2A0–2A3 → 2Y0–2Y3), each controlled by its own enable (1OE, 2OE). All inputs feature Schmitt-trigger action with 2 V VIH and 0.8 V VIL thresholds, enabling robust noise immunity on noisy PCB traces.

Dynamic operation is characterized by matched enable/disable timing (ten = 4.9 ns, tdis = 5.8 ns at CL = 50 pF) and low output skew (tsk(o) ≤ 1 ns), ensuring synchronized bus driving across all eight outputs under load.

Key Specifications

Pinout & Package

TSSOP20 package (SOT360-1), 4.4 mm body width, 0.65 mm pitch, 1.1 mm max height - optimized for high-density PCB layouts with thermal performance up to 500 mW at ≤100 °C ambient.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC244APWR and 74ACT244SC, the 74LV244ATPWJ uniquely combines 5 V operation, IOFF protection, Schmitt inputs, and extended temperature range - making it the sole choice for robust industrial backplane and mixed-voltage hot-swap interfaces.

Availability

74LV244ATPWJ is available at Aetrix Electronics and suitable for industrial automation backplanes, automotive body control modules, legacy system upgrades, and automated test equipment requiring stable component supply across extended temperature ranges.

Supply support for 74LV244ATPWJ 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 logic, discrete, and MOSFET solutions with focus on efficiency, reliability, and sustainability.

The 74LV logic family targets industrial and automotive applications requiring robustness, wide temperature operation, and mixed-voltage interoperability - designed specifically for noise-tolerant, hot-swap-capable system interfaces.

FAQ

Does the 74LV244ATPWJ support true bidirectional data flow?

No. The 74LV244ATPWJ is a unidirectional octal buffer with fixed input-to-output direction per group (1A→1Y, 2A→2Y). It lacks internal direction control or bus transceiver functionality. For bidirectional operation, a dedicated transceiver like the 74LV245 must be used instead.

What is the maximum capacitive load this device can drive while maintaining specified timing?

The datasheet specifies tpd and timing parameters up to CL = 50 pF. Driving loads beyond 50 pF increases propagation delay nonlinearly and may violate setup/hold margins. For >50 pF loads, use series termination or buffer fanout staging - the device's 35 mA drive strength supports moderate capacitive loads but not heavy bus stubs.

Can 74LV244ATPWJ be used with a 3.3 V supply?

No. The absolute minimum VCC is 4.5 V per Table 4 (Limiting Values), and recommended operation starts at 4.5 V. Operation below 4.5 V violates specification and risks undefined output states, increased ICC, and failure to meet VIH/VIL thresholds. Use 74LVC244 for 3.3 V systems.

How does the IOFF feature behave when VCC is ramped down during system power sequencing?

IOFF activates automatically when VCC drops below ~1.5 V, disabling outputs and limiting backflow current to <0.5 μA (per Table 6). This prevents reverse current from powered downstream circuits into the sinking buffer, protecting both the 74LV244ATPWJ and connected devices during asymmetric power-down sequences.