Nexperia USA Inc. 74ALVC245PW,118

Overview

74ALVC245PW,118 from Nexperia is an octal 3-state bus transceiver with bidirectional data flow controlled by DIR and OE inputs, operating across 1.65 V to 3.6 V supply, featuring Schmitt-trigger inputs for noise immunity and IOFF circuitry for partial power-down protection in mixed-voltage systems - used in level-shifting interfaces between 1.8 V/2.5 V/3.3 V logic domains in industrial control backplanes.

For engineers reviewing the 74ALVC245PW,118 datasheet, 74ALVC245PW,118 pinout, 74ALVC245PW,118 application, or 74ALVC245PW,118 equivalent, key selection criteria include voltage translation capability (1.65–3.6 V), guaranteed 3-state isolation during power sequencing, propagation delay ≤3.9 ns at 3.3 V, -40 °C to +125 °C operation, and TSSOP20 package thermal performance.

Technical Context

This device implements dual-rail CMOS logic with independent A- and B-side 8-bit I/O banks, where DIR selects direction (A→B or B→A) and active-low OE enables/disables all outputs simultaneously. The IOFF circuit ensures <±80 μA off-state leakage when VCC = 0 V, enabling safe hot-insertion in powered-backplane systems.

Schmitt-trigger inputs provide hysteresis (typically 0.3 V at 3.3 V), tolerating slow-edge signals up to 20 ns/V slew rate, while static input thresholds (VIH ≥2.0 V, VIL ≤0.8 V at VCC = 3.3 V) guarantee TTL-level compatibility and robust noise margins in noisy industrial environments.

Key Specifications

Pinout & Package

TSSOP20 (SOT360-1) package: 20-terminal plastic thin shrink small outline, 4.4 mm body width, 0.65 mm pitch, 0.85 mm max height - optimized for high-density routing and thermal dissipation in space-constrained industrial controllers.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC245APWR, 74ALVC245PW,118 provides critical IOFF protection for live-insertion systems; compared with 74LVC245AD,118, it delivers identical functionality in 40 % smaller footprint with adequate thermal margin for most industrial applications.

Availability

74ALVC245PW,118 is available at Aetrix Electronics and suitable for industrial backplane interfaces, multi-voltage microcontroller expansions, hot-swappable module communication, and programmable logic I/O bridging requiring stable component supply across extended temperature ranges.

Supply support for 74ALVC245PW,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, analog, and MOSFET solutions, with manufacturing rooted in process optimization and automotive-grade quality systems.

The 74ALVC series targets industrial and communications infrastructure applications demanding wide voltage operation, robust ESD immunity, and guaranteed partial power-down behavior - designed specifically for mixed-supply system interconnects.

FAQ

Does 74ALVC245PW,118 support true bidirectional operation without external logic?

Yes. Direction is controlled solely by the DIR pin: LOW enables A→B data flow, HIGH enables B→A. No external inverters or glue logic are needed. Both ports feature identical Schmitt-trigger inputs and 3-state outputs, allowing seamless reversal of data path on-the-fly during system operation.

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

The device is characterized up to 30 pF load capacitance at VCC = 1.65–2.7 V and 50 pF at VCC = 3.0–3.6 V (per Table 9 test conditions). At 50 pF and 3.3 V, propagation delay remains ≤3.9 ns, and output rise/fall times stay within 2.5 ns - sufficient for driving 10 cm FR-4 traces with typical board parasitics.

Can OE and DIR be tied together for unidirectional use?

No. OE is active-low and controls output enable/disable; DIR is active-high and controls data direction. Tying them violates functional table constraints and may cause undefined states. For unidirectional use, fix DIR to constant HIGH or LOW and control bus access exclusively via OE.

Is the exposed thermal pad on the TSSOP20 package electrically connected?

No. The thermal pad (terminal 1 index area) has no internal electrical connection. Per datasheet note, it may remain floating or be soldered to GND for thermal improvement, but must never be connected to any voltage rail other than ground to avoid short circuits.