Nexperia USA Inc. 74LVC245APW,112

Overview

74LVC245APW,112 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. Schmitt-trigger inputs enable robust operation with slow-rising signals in mixed-voltage (3.3 V/5 V) digital interfaces such as microcontroller-to-peripheral data buses.

For engineers reviewing the 74LVC245APW,112 datasheet, 74LVC245APW,112 pinout, 74LVC245APW,112 application, or 74LVC245APW,112 equivalent, key selection criteria include voltage translation capability, 3-state timing (enable/disable delays), bus hold absence (vs. LVCH variant), thermal performance in TSSOP20, and JEDEC-compliant 1.65–3.6 V operation across industrial temperature range.

Technical Context

This device implements a dual-bus, direction-controlled 8-bit transceiver architecture with independent A-side and B-side I/Os. Direction is set by DIR (A→B when HIGH, B→A when LOW), while OE (active LOW) enables/disables all outputs simultaneously into high-impedance state. The IOFF circuit actively disables outputs during power-down to prevent backflow current.

Inputs are overvoltage tolerant up to 5.5 V regardless of VCC, enabling safe interfacing between 3.3 V logic and legacy 5 V systems. Unlike the LVCH variant, the LVC version lacks bus hold on data inputs-requiring external pull-ups/pull-downs where signal integrity demands it.

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, RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LVCH245APW,112, the LVC variant trades bus hold for lower static current and smaller die size; versus SN74LVC245APWR, it offers tighter ICC spec and marginally better propagation delay consistency across voltage/temperature, favoring precision timing-critical systems.

Availability

74LVC245APW,112 is available at Aetrix Electronics and suitable for industrial PLC backplanes, embedded microcontroller expansion buses, automotive body control modules, and test equipment digital pattern generators requiring stable component supply across extended temperature ranges.

Supply support for 74LVC245APW,112 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, reliable discrete, logic, and MOSFET solutions optimized for efficiency-critical applications in automotive, industrial, and consumer markets.

The 74LVC series targets low-voltage, low-power digital interfacing with strict JEDEC compliance, designed specifically for voltage translation and bus isolation in space-constrained, thermally demanding embedded systems.

FAQ

Can 74LVC245APW,112 operate with VCC = 1.2 V while driving 5 V-tolerant loads?

Yes - the device functions correctly at 1.2 V VCC, and its inputs tolerate up to 5.5 V regardless of supply voltage. However, output HIGH voltage (VOH) at 1.2 V is only guaranteed ≥1.08 V (min), so it cannot directly drive standard 5 V TTL inputs; external level shifting remains necessary for 5 V load driving.

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

The datasheet specifies CPD = 14.4 pF (typical) and guarantees timing up to 50 pF load capacitance with RL = 500 Ω. For reliable operation beyond 50 pF, reduce clock frequency or add series termination; exceeding 50 pF risks violating tpd/tPLZ specs and increasing ground bounce.

How does IOFF behavior differ from standard 3-state disable?

Standard 3-state (OE HIGH) disconnects outputs electrically but leaves internal paths vulnerable to back-current if external voltages exceed VCC. IOFF actively disables output drivers and isolates I/O pins even when VCC = 0 V, preventing reverse current flow - critical for hot-swap and partial-power-down systems.

Is there a thermal limitation for continuous operation in TSSOP20 package?

Yes - the TSSOP20 (SOT360-1) has Ptot = 500 mW at Tamb ≤ 100 °C, derating linearly by 10.0 mW/K above that. At 125 °C ambient, max dissipation drops to ~475 mW. Layout must include ≥2 cm² copper pour under exposed pad (if present) and minimize trace resistance to GND/VCC.