Nexperia USA Inc. 74ABT244PW,118

Overview

74ABT244PW,118 from Nexperia is an octal 3-state buffer/line driver in TSSOP20 package, designed for bidirectional bus interfacing with two independent 4-bit sections (1A/1Y and 2A/2Y), ±64 mA/–32 mA output drive, IOFF-enabled partial power-down protection, and operation from 4.5 V to 5.5 V across –40 °C to +85 °C. It enables high-speed data routing in industrial control backplanes.

For engineers reviewing the 74ABT244PW,118 datasheet, 74ABT244PW,118 pinout, 74ABT244PW,118 application, or 74ABT244PW,118 equivalent, key selection criteria include dual 4-bit 3-state enable control, BiCMOS propagation delay (≤4.6 ns), IOFF leakage <100 μA at VCC = 0 V, and TTL-level input compatibility without level shifting.

Technical Context

The 74ABT244PW implements two independent 4-bit non-inverting buffer sections, each controlled by a dedicated active-low output enable (1OE, 2OE). Its BiCMOS architecture delivers TTL-compatible inputs and high-current CMOS outputs, supporting live insertion and hot-swap scenarios via IOFF circuitry that disables outputs and blocks backflow current during power-down.

Propagation delays are tightly specified: tPLH/tPHL ≤ 4.6 ns (25 °C), tPZH/tPHZ ≤ 5.1 ns, ensuring deterministic timing in synchronous bus systems. The device meets JESD78 Class II latch-up immunity (>500 mA) and ESD robustness per JS-001 (HBM >2000 V) and JS-002 (CDM >1000 V).

Key Specifications

Pinout & Package

TSSOP20 package (SOT360-1): 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 SN74ABT244N, the 74ABT244PW,118 saves >40% board area and supports finer-pitch assembly; versus 74LVC244APW, it retains 5 V tolerance, higher drive, and critical IOFF protection for industrial backplanes.

Availability

74ABT244PW,118 is available at Aetrix Electronics and suitable for industrial PLC backplanes, telecom line card diagnostics, automated test equipment signal routing, and legacy ISA interface modules requiring stable component supply across extended temperature ranges.

Supply support for 74ABT244PW,118 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 focused on high-volume, high-reliability logic, discrete, and MOSFET solutions, serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.

The 74ABT series targets high-speed 5 V digital systems requiring robust bus interfacing, combining BiCMOS performance with industrial-grade reliability and IOFF safety features.

FAQ

Does 74ABT244PW,118 support mixed-voltage operation between 3.3 V and 5 V domains?

No. The device operates strictly at 4.5 V to 5.5 V and requires 5 V logic levels on all inputs. Its TTL-compatible inputs accept VIH ≥ 2.0 V, but output VOH is specified only at VCC = 4.5–5.5 V; direct connection to 3.3 V receivers requires external level translation or series resistors to limit current.

What is the maximum capacitive load this buffer can drive while maintaining timing specs?

The datasheet specifies dynamic characteristics up to 50 pF load capacitance (CL = 50 pF, RL = 500 Ω, VEXT = 7 V). At this load, tPLH/tPHL remains ≤ 4.6 ns. Driving >50 pF increases propagation delay nonlinearly and may violate setup/hold margins; for heavier loads, add series termination or reduce trace length.

Can both output enable pins (1OE and 2OE) be tied together for single 8-bit control?

Yes. Connecting 1OE and 2OE simplifies control to one signal, converting the device into a unified 8-bit buffer. However, this forfeits independent group isolation-both 1Y and 2Y outputs switch simultaneously, eliminating segmented bus arbitration capability.

Is IOFF functionality active only during full power-down, or does it engage during brown-out conditions?

IOFF activates whenever VCC drops below ~0.8 V, per the power-up/power-down leakage test condition (VCC = 2.0 V transition). During brown-out (e.g., VCC = 2.5 V), IOFF is not fully engaged; outputs remain functional but may exhibit degraded VOL/VOH and increased ICC. Full IOFF protection requires VCC ≈ 0 V.