Nexperia USA Inc. 74LV245ATPWJ

Overview

74LV245ATPWJ from Nexperia is an octal 3-state bus transceiver with bidirectional data flow control via DIR and output enable (OE) pins, operating across 4.5 V to 5.5 V supply, featuring TTL-compatible inputs, Schmitt-trigger inputs for noise immunity, and IOFF partial power-down protection. It enables level translation between 3.3 V and 5 V domains in microcontroller peripheral buses and industrial I/O expansion systems.

For engineers reviewing the 74LV245ATPWJ datasheet, 74LV245ATPWJ pinout, 74LV245ATPWJ application, or 74LV245ATPWJ equivalent, key selection criteria include propagation delay (3.1 ns typ at 5 V), 3-state output leakage (±0.25 μA), IOFF-enabled safe power sequencing, and TSSOP20 package compatibility with high-density PCB layouts.

Technical Context

The 74LV245ATPWJ implements dual-bus bidirectional data transfer using a single DIR signal to determine direction (A→B or B→A), while OE (active LOW) independently controls 3-state output enable/disable. Its Schmitt-trigger inputs tolerate slow-rising signals up to 20 ns/V transition rate, supporting legacy TTL and mixed-voltage system interfacing.

IOFF circuitry actively disables outputs when VCC = 0 V, limiting backflow current to ≤0.5 μA, enabling hot-swap and partial power-down operation without risk of latch-up (≥250 mA per JESD78 Class II). All static and dynamic parameters are fully specified over −40 °C to +125 °C.

Key Specifications

Pinout & Package

TSSOP20 (SOT360-1) package: 20-pin plastic thin shrink small outline, 4.4 mm body width, 0.65 mm pitch, 1.1 mm max height - optimized for automated SMT assembly and thermal dissipation in space-constrained designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC245APWR and 74ALVC245PW, the 74LV245ATPWJ uniquely combines 5 V operation, IOFF protection, and extended temperature support - making it the sole choice for robust mixed-voltage industrial and automotive bus isolation.

Availability

74LV245ATPWJ is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, microcontroller I/O expansion, and automated test equipment requiring stable component supply across extended temperature ranges and mixed-voltage operation.

Supply support for 74LV245ATPWJ 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 logic, analog, and MOSFET solutions with leadership in efficiency, miniaturization, and quality for industrial, automotive, and consumer markets.

The 74LV245AT belongs to Nexperia's LV (Low Voltage) logic family, engineered for robust 5 V operation with TTL compatibility, mixed-voltage interfacing, and enhanced power-down safety in mission-critical embedded systems.

FAQ

Can the 74LV245ATPWJ operate with VCC = 4.75 V and still meet all timing specifications?

Yes. The device is fully characterized from 4.5 V to 5.5 V, and all dynamic parameters-including tpd (3.1 ns typ), ten (4.5 ns typ), and tdis (3.8 ns typ)-are guaranteed across this entire range at −40 °C to +125 °C. At 4.75 V, propagation delay remains within 3.3 ns max (CL = 15 pF), satisfying timing budgets for 20 MHz bus cycles.

What is the maximum capacitive load the 74LV245ATPWJ can drive while maintaining specified VOL and VOH?

The 74LV245ATPWJ is specified for CL ≤ 50 pF in dynamic testing, with VOL ≤ 0.44 V and VOH ≥ 3.94 V at IO = ±16 mA and VCC = 4.5 V. Driving loads beyond 50 pF increases propagation delay (e.g., tpd rises to 4.4 ns at CL = 50 pF) and may degrade edge rates; external series termination is recommended for >50 pF traces.

Does the IOFF feature require any external biasing or pull-up resistors to function correctly during power-down?

No. IOFF is fully internal and activates automatically when VCC drops below ~0.8 V; no external components are needed. Output leakage remains ≤0.5 μA regardless of input or output voltage (0 V to 5.5 V), ensuring safe isolation even when adjacent rails remain powered - verified per JESD78 Class II latch-up and JEDEC JS-001 ESD standards.

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

Schmitt-trigger inputs provide ≥0.5 V hysteresis (VIH − VIL), meaning a rising signal must exceed 2.0 V to register HIGH, and falling signals must drop below 0.8 V to register LOW. This prevents multiple toggles on slow or noisy edges - critical for long traces in factory automation wiring where edge rates can fall below 20 ns/V, as explicitly rated in the datasheet.