Nexperia USA Inc. 74LVC245APW,118

Overview

74LVC245APW,118 from Nexperia is an octal 3-state bus transceiver with bidirectional data flow controlled by DIR and active-low OE inputs. It operates from 1.2 V to 3.6 V, tolerates 5.5 V inputs, and features IOFF partial power-down protection and Schmitt-trigger inputs for noise immunity. Used in mixed-voltage board-level interconnects between 3.3 V microcontrollers and 5 V peripherals.

For engineers reviewing the 74LVC245APW,118 datasheet, 74LVC245APW,118 pinout, 74LVC245APW,118 application, or 74LVC245APW,118 equivalent, key selection criteria include voltage translation capability (1.2–3.6 V supply with 5.5 V tolerant inputs), 3-state timing (tpd ≤ 8.0 ns at 3.3 V), IOFF-enabled hot-swap safety, and TSSOP20 thermal performance (Ptot = 500 mW).

Technical Context

This device implements a dual-rail CMOS octal transceiver architecture with independent direction (DIR) and output enable (OE) control logic. All 16 I/O pins (A0–A7, B0–B7) support bidirectional data transfer, while Schmitt-trigger inputs ensure robust operation with slow-rising signals.

The IOFF circuit actively disables outputs when VCC = 0 V, blocking backflow current during partial power-down-critical for hot-plug interfaces. Bus hold functionality is absent in the 74LVC245A variant (present only in 74LVCH245A), confirming this part relies on external termination or system-level hold.

Key Specifications

Pinout & Package

TSSOP20 plastic thin shrink small outline package (SOT360-1), 20-lead, 4.4 mm body width, 0.65 mm pitch, exposed pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LVC245ABQ, the 74LVC245APW offers identical logic functionality in a more manufacturable TSSOP package with established reflow compatibility; versus SN74LVC245APWR, it provides equivalent timing and voltage specs with Nexperia's documented 125 °C industrial qualification and JEDEC-aligned ESD ratings.

Availability

74LVC245APW,118 is available at Aetrix Electronics and suitable for industrial PLC backplanes, embedded MCU peripheral bridges, automotive body control modules, and automated test equipment requiring stable component supply across extended temperature ranges.

Supply support for 74LVC245APW,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 for industrial, computing, and consumer markets.

The 74LVC series delivers robust, low-power, wide-supply-voltage logic devices optimized for voltage translation and bus isolation in resource-constrained embedded systems.

FAQ

Can 74LVC245APW,118 interface directly between 1.8 V and 5 V logic without external components?

Yes - its 1.2 V to 3.6 V supply range and 5.5 V input tolerance allow direct connection of 1.8 V outputs to its inputs while powered at 1.8 V, and 5 V signals may be applied to inputs regardless of VCC (as long as VI ≤ 5.5 V). Outputs swing rail-to-rail within VCC, so external level shifting is needed only if 5 V output levels are required.

What is the purpose of the IOFF feature, and how does it behave during power loss?

IOFF disables all outputs and blocks current flow when VCC = 0 V, preventing backfeed from live buses into unpowered circuitry. Measured IOFF leakage is ≤ ±20 μA at VCC = 0 V and VI/VO = 5.5 V, making it suitable for hot-swap applications like modular I/O cards where power sequencing cannot be guaranteed.

Does 74LVC245APW,118 include bus hold circuitry on its data pins?

No - bus hold (IBHL/IBHH) is exclusive to the 74LVCH245A variant. The 74LVC245A lacks internal weak pull-up/pull-down on A0–A7 and B0–B7, requiring external termination or system-level hold if floating inputs must be avoided during tri-state periods.

How does the Schmitt-trigger input improve noise immunity compared to standard CMOS inputs?

Schmitt-trigger inputs provide ≥ 0.3 V hysteresis, meaning the threshold for rising edges (~0.65×VCC) differs from falling edges (~0.35×VCC). This prevents multiple switching events on slow or noisy signals - critical for reliable DIR and OE control in electrically harsh environments like factory floors or automotive cabins.