Nexperia USA Inc. 74ABT245PW,118

Overview

74ABT245PW,118 from Nexperia is an octal bidirectional 3-state transceiver with independent direction (DIR) and output enable (OE) controls, operating at 4.5–5.5 V. It provides ±64 mA/±32 mA drive capability, supports partial power-down via IOFF circuitry, and is rated for -40 °C to +85 °C operation in TSSOP20 packaging. It interfaces TTL-level buses between microcontroller peripherals and memory subsystems.

For engineers reviewing the 74ABT245PW,118 datasheet, 74ABT245PW,118 pinout, 74ABT245PW,118 application, or 74ABT245PW,118 equivalent, this device is selected for high-speed bidirectional data routing in industrial control backplanes, legacy bus isolation, and hot-swap-capable I/O expansion where IOFF-enabled power sequencing is required.

Technical Context

The 74ABT245PW,118 implements a BiCMOS-based octal transceiver architecture with separate DIR and active-low OE inputs enabling precise control of data flow direction and output state. Its IOFF circuitry actively disables outputs when VCC = 0 V, limiting backflow current to ±100 μA and supporting safe partial power-down.

Propagation delays are tightly controlled: tPLH/tPHL ≤ 4.6 ns (max), tPZH/tPLZ ≤ 5.3 ns (max), and tPHZ/tPLZ ≤ 7.2 ns (max) across temperature, ensuring timing predictability in synchronous bus environments. Input clamping voltage is specified at -1.2 V, and static input leakage remains ≤ ±100 μA over full temperature range.

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 and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ABT245DBR, the 74ABT245PW,118 offers identical performance in a smaller, actively supported TSSOP20 package; versus 74LVC245APW, it delivers higher drive, 5 V tolerance, and critical IOFF protection-making it irreplaceable in industrial 5 V bus isolation.

Availability

74ABT245PW,118 is available at Aetrix Electronics and suitable for industrial PLC backplanes, legacy bus isolation, and hot-swap I/O expansion requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for 74ABT245PW,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 delivering high-performance logic, discrete, and MOSFET solutions optimized for industrial, automotive, and computing applications.

The 74ABT series targets high-speed, high-drive 5 V logic interfacing-designed specifically for robust bidirectional bus communication in noisy, thermally demanding environments where reliability and timing precision are critical.

FAQ

What is the maximum capacitive load the 74ABT245PW,118 can drive while maintaining specified timing?

The device is characterized up to 50 pF load capacitance per output, as confirmed in Table 9 of the datasheet (CL = 50 pF, RL = 500 Ω). At this load, propagation delays remain within 4.6 ns (tPLH/tPHL) and 7.2 ns (tPHZ/tPLZ) limits across temperature. Driving >50 pF may increase delay unpredictably and reduce noise margin due to increased slew rate degradation.

Can the 74ABT245PW,118 be used in mixed-voltage systems with 3.3 V controllers?

No-it is strictly a 4.5–5.5 V device with TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V). While 3.3 V logic outputs may meet VIH min under some conditions, they lack guaranteed noise margin and violate recommended operating conditions. A dedicated level translator (e.g., TXB0108) is required for reliable 3.3 V ↔ 5 V interfacing.

How does the IOFF feature behave when VCC is ramping from 0 V to 5 V?

IOFF activates automatically when VCC drops below ~2.0 V and remains active until VCC exceeds ~2.1 V, as defined in Note [1] of Table 6. During this transition, output leakage is limited to ±100 μA, preventing back-current even if port pins are held at 5 V by external sources-critical for safe power sequencing in multi-rail systems.

Is the pinout of 74ABT245PW,118 identical to the SO20 version (74ABT245D)?

Yes-the pin functions and numbering are identical between SOT360-1 (TSSOP20) and SOT163-1 (SO20) packages, as confirmed in Section 5.1 pinning diagrams. Both use DIR on pin 1, A0–A7 on pins 2–9, GND on pin 10, B7–B0 on pins 11–18, OE on pin 19, and VCC on pin 20. Only physical dimensions and thermal characteristics differ.