Nexperia USA Inc. 74AHCV245APWJ

Overview

74AHCV245APWJ from Nexperia is an octal 3-state bus transceiver with Schmitt-trigger inputs, bidirectional data flow controlled by DIR and OE pins, 1.8 V to 5.5 V supply range, typical propagation delay of 3.2 ns at 5 V, and IOFF partial power-down protection. It is used for level translation and bus driving in mixed-voltage digital systems such as industrial I/O controllers and memory address buffering.

For engineers reviewing the 74AHCV245APWJ datasheet, 74AHCV245APWJ pinout, 74AHCV245APWJ application, or 74AHCV245APWJ equivalent, key selection criteria include voltage translation capability across 1.8–5.5 V rails, sub-4 ns propagation delay at 5 V, Schmitt-trigger noise immunity on all inputs, and IOFF-enabled safe power sequencing in partial-down systems.

Technical Context

This device implements dual-rail bidirectional data transfer via a single DIR control line and independent 3-state output enable (OE, active LOW). All 16 data terminals (A0–A7, B0–B7) feature Schmitt-trigger inputs with hysteresis up to 1.6 V at 5.5 V VCC, enabling robust noise rejection on slow or noisy signals.

The IOFF circuit actively disables outputs when VCC = 0 V, limiting backflow current to ≤0.5 μA, making it suitable for hot-swap and multi-rail power sequencing. Input overvoltage tolerance up to 7.0 V allows safe interfacing with higher-voltage logic without external clamping.

Key Specifications

Pinout & Package

TSSOP20 (SOT360-1) package: plastic thin shrink small outline, 20 leads, 4.4 mm body width, 0.65 mm lead pitch, 1.1 mm max height - optimized for high-density PCB layout with inputs and outputs on opposite sides.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC245AQPWRQ1 and 74LVC245AT20-13, the 74AHCV245APWJ uniquely combines IOFF protection, 125 °C operation, and 3000 V HBM ESD in a pin-compatible TSSOP20 package-making it the only option for thermally demanding, hot-pluggable, or mixed-rail industrial systems requiring guaranteed back-current suppression.

Availability

74AHCV245APWJ is available at Aetrix Electronics and suitable for industrial PLC backplanes, embedded memory buffering, automotive body control modules, and test equipment signal conditioning requiring stable component supply across extended temperature and mixed-voltage environments.

Supply support for 74AHCV245APWJ 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, discrete, and MOSFET solutions, with leadership in advanced packaging and automotive-grade qualification.

The 74AHCV series targets high-speed, low-power, mixed-voltage digital interfacing in industrial, computing, and communications infrastructure-designed specifically for robust operation across wide VCC ranges and harsh thermal conditions.

FAQ

Can 74AHCV245APWJ operate with different supply voltages on Port A and Port B?

No. The 74AHCV245APWJ has a single VCC pin powering both ports; it achieves mixed-voltage operation by accepting input levels up to 7.0 V regardless of VCC, and driving outputs to valid logic levels within the VCC rail. True dual-supply translation requires separate VCCA/VCCB devices like the TXB0108.

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

Timing specifications (e.g., 3.2 ns tpd) are guaranteed up to 15 pF load capacitance at 5 V. At 50 pF, propagation delay increases to 4.5 ns (typical), remaining within datasheet limits. For loads >50 pF, derating or adding series termination is recommended to maintain signal integrity and timing margins.

Does the IOFF feature protect against back-current when only OE is HIGH but VCC remains powered?

No. IOFF activates only when VCC = 0 V. When VCC is present and OE is HIGH, outputs go to high-impedance (Z-state) but IOFF is inactive; back-current protection in that condition relies solely on the inherent reverse-blocking behavior of the output MOSFETs, not the IOFF circuitry.

How does the Schmitt-trigger input improve performance in noisy industrial environments?

Schmitt-trigger inputs provide 0.5–1.6 V hysteresis, meaning the rising and falling input thresholds differ significantly. This prevents multiple output transitions caused by noise riding on slowly changing signals-ensuring each input edge produces exactly one clean output transition, critical for reliable operation near motors, relays, or switching power supplies.