Nexperia USA Inc. 74LVC244APW,118

Overview

74LVC244APW,118 from Nexperia is an octal 3-state buffer/line driver in TSSOP20 package, designed for bidirectional bus interfacing and level translation between 1.2 V–3.6 V logic domains. It features dual independent output enables (1OE, 2OE), Schmitt-trigger inputs for noise immunity, and IOFF circuitry enabling partial power-down operation. Used in industrial control backplanes and FPGA I/O expansion where mixed-voltage signal routing is required.

For engineers reviewing the 74LVC244APW,118 datasheet, 74LVC244APW,118 pinout, 74LVC244APW,118 application, or 74LVC244APW,118 equivalent, key selection criteria include 3.6 V overvoltage-tolerant inputs, 24 mA drive strength at 3.0 V, propagation delay ≤5.9 ns (VCC = 3.3 V), and guaranteed -40 °C to +125 °C operation with IOFF protection.

Technical Context

This device implements two independent 4-bit non-inverting buffers, each controlled by a dedicated active-low output enable (1OE for Y0–Y3, 2OE for Y4–Y7). All inputs accept 0–5.5 V signals regardless of VCC, enabling robust 3.3 V ↔ 5 V translation without external components.

The IOFF circuit disables outputs when VCC = 0 V, blocking backflow current during hot-swap or partial power-down sequences. Schmitt-trigger input thresholds (e.g., VIH = 2.0 V min at VCC = 3.3 V) tolerate slow-rising signals up to 20 ns/V slew rate, supporting legacy microcontroller GPIOs and noisy industrial buses.

Key Specifications

Pinout & Package

TSSOP20 plastic thin shrink small outline package (SOT360-1); 20 leads; body width 4.4 mm; 0.65 mm pitch; exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC244APWR, the 74LVC244APW,118 offers superior power-down safety via IOFF, while 74LVCH244APW adds bus-hold for robustness against floating inputs-neither is pin-compatible with non-TSSOP variants, and all require matching 0.65 mm pitch layout.

Availability

74LVC244APW,118 is available at Aetrix Electronics and suitable for industrial PLC backplanes, FPGA I/O expansion, automotive body control modules, and automated test equipment requiring stable component supply across extended temperature ranges.

Supply support for 74LVC244APW,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 essential efficiency-enhancing components, delivering high-performance logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74LVC series targets low-voltage, high-speed digital interfacing in space-constrained applications, emphasizing power efficiency, mixed-voltage compatibility, and robustness in harsh environments.

FAQ

Can 74LVC244APW,118 be used with 5 V microcontrollers?

Yes - its inputs tolerate up to 5.5 V regardless of VCC, allowing direct connection to 5 V TTL outputs. However, outputs swing only from GND to VCC (max 3.6 V), so driving 5 V loads requires external pull-up resistors or compatible receivers.

What is the purpose of the IOFF feature?

IOFF disables outputs when VCC = 0 V, preventing reverse current flow from powered downstream circuits into the unpowered IC. This protects both the buffer and connected devices during hot-swap, partial system shutdown, or brown-out conditions.

How does Schmitt-trigger input action improve noise immunity?

Schmitt-trigger inputs provide hysteresis (≥0.3 V at 3.3 V), meaning the threshold for detecting a rising edge (VIH ≈ 2.0 V) differs from that for a falling edge (VIL ≈ 0.8 V). This prevents multiple toggles on slow or noisy edges, critical for reliability on long PCB traces or industrial wiring.

Is thermal performance affected by the TSSOP20 package?

Yes - the SOT360-1 TSSOP20 package has a thermal resistance (RθJA) of 100 °C/W, with total power dissipation derated linearly at 10.0 mW/K above 100 °C ambient. For continuous 24 mA output loading, board-level copper area and airflow must be verified to maintain junction temperature below 125 °C.