Nexperia USA Inc. 74LVT244BPW,118

Overview

74LVT244BPW,118 from Nexperia is a 3.3 V octal buffer/line driver with dual 3-state outputs, designed for bidirectional bus interfacing in mixed-voltage systems. It features two independent output-enable inputs (1OE, 2OE), bus-hold inputs eliminating external pull-ups, and ±32 mA / +64 mA drive capability. Used in industrial control backplanes and FPGA I/O expansion where level translation and high-impedance isolation are required.

For engineers reviewing the 74LVT244BPW,118 datasheet, 74LVT244BPW,118 pinout, 74LVT244BPW,118 application, or 74LVT244BPW,118 equivalent, key selection criteria include 3.3 V operation with 5 V-tolerant inputs, propagation delay ≤3.5 ns at 3.3 V, bus-hold functionality, TSSOP20 package thermal profile, and dual 4-bit enable control for segmented bus management.

Technical Context

This BiCMOS device implements two independent 4-bit non-inverting buffers, each controlled by a dedicated active-low output-enable input (1OE for Y0–Y3, 2OE for Y0–Y3). Inputs tolerate up to 5.5 V regardless of VCC, enabling safe interfacing with 5 V logic while operating from a 2.7–3.6 V supply.

The IOFF circuitry ensures power-down isolation, and bus-hold inputs maintain valid logic states on unused pins without external resistors. Propagation delays are specified from 1.1 ns (tPLH) to 4.5 ns (tPHZ), with guaranteed operation across –40 °C to +85 °C ambient.

Key Specifications

Pinout & Package

TSSOP20 plastic thin shrink small outline package (SOT360-1); 20-pin, 4.4 mm body width, 0.65 mm pitch; suitable for high-density PCB layouts with improved thermal dissipation vs. SO20.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC244APWR and 74ALVC244PW,118, the 74LVT244BPW,118 uniquely delivers 5 V-tolerant inputs, bus-hold, and +64 mA sink capability-critical for industrial backplane reliability and mixed-voltage interoperability.

Availability

74LVT244BPW,118 is available at Aetrix Electronics and suitable for industrial backplane interfaces, FPGA I/O expansion, communications multiplexing, and test equipment signal conditioning requiring stable component supply across extended temperature ranges.

Supply support for 74LVT244BPW,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 delivering high-performance logic, analog, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in industrial and consumer applications.

The 74LVT series targets high-speed, low-power 3.3 V bus interface applications-designed specifically for robust operation in noisy industrial environments with mixed-voltage signaling and hot-swap capability.

FAQ

Can 74LVT244BPW,118 operate with a 2.5 V supply?

No. The recommended operating supply range is strictly 2.7 V to 3.6 V per Table 5. At 2.5 V, VIH minimum (2.0 V) and VOH performance degrade beyond specification, and bus-hold current falls outside the 75–130 μA range. Operation below 2.7 V risks functional failure and is not characterized.

What is the maximum capacitive load this device can drive reliably?

The device is characterized up to 50 pF load capacitance (Table 9), with propagation delays measured under those conditions. Driving >50 pF may increase tPLH/tPHL beyond 3.5 ns and raise dynamic power; for >100 pF, consider adding series termination or using a higher-drive buffer like 74LVT16244.

How does bus-hold functionality behave when an input is pulled to 2.5 V?

At VCC = 3.3 V, bus-hold asserts LOW if VI ≤ 0.8 V (VIL max) and asserts HIGH if VI ≥ 2.0 V (VIH min). A 2.5 V input exceeds VIH, so bus-hold reinforces HIGH state with IBHH ≈ –100 μA - maintaining logic integrity without external bias.

Is thermal derating required for continuous operation at 85 °C ambient?

Yes. Total power dissipation must remain ≤500 mW (Table 4). At 85 °C, junction temperature rise depends on PCB copper area and airflow. With standard 2-layer board and no forced air, limit simultaneous active outputs to ≤6 channels at full 64 mA sink to stay within Ptot and Tj ≤150 °C.