Nexperia USA Inc. 74VHC245PW,118

Overview

74VHC245PW,118 from Nexperia is a high-speed CMOS octal bus transceiver with non-inverting 3-state outputs in both directions, featuring DIR and active-low OE control inputs for bidirectional data flow management in 5 V digital systems. It operates from 2.0 V to 5.5 V, delivers propagation delay as low as 3.5 ns (VCC = 4.5–5.5 V, CL = 15 pF), and supports industrial temperature range (−40 °C to +125 °C) in TSSOP20 package.

For engineers reviewing the 74VHC245PW,118 datasheet, 74VHC245PW,118 pinout, 74VHC245PW,118 application, or 74VHC245PW,118 equivalent, key selection criteria include bidirectional 3-state bus isolation capability, TTL-compatible input thresholds (for 74VHCT variant), Schmitt-trigger inputs, ESD robustness (HBM >2000 V), and thermal performance in space-constrained PCB layouts.

Technical Context

The 74VHC245PW,118 implements a dual-rail, direction-controlled transceiver architecture where DIR selects data flow direction (A→B or B→A), while OE independently enables/disables all outputs into high-impedance state-enabling clean bus sharing across multiple devices. Its CMOS input structure accepts voltages up to VCC + 0.5 V and includes Schmitt-trigger action on all inputs for noise immunity.

Functionally, it operates as a level-shifting, bus-isolating interface between two 8-bit data buses, with static input thresholds defined at VIH = 3.85 V (VCC = 5.5 V) and VIL = 1.65 V, and dynamic timing characterized under 15 pF and 50 pF loads. Propagation delays are symmetric for A→B and B→A paths, and enable/disable times are separately specified for OE-to-output transitions.

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 74LVC245APW,118 and SN74LVCH245APW, the 74VHC245PW,118 uniquely supports full 2.0–5.5 V operation with TTL-compatible inputs and industry-standard OE/DIR pinout-making it the optimal drop-in solution for upgrading legacy 5 V bus architectures without redesign.

Availability

74VHC245PW,118 is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, test instrumentation, and medical imaging systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74VHC245PW,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 specializing in high-performance, energy-efficient logic, analog, and discrete components for automotive, industrial, and consumer applications.

The 74VHC245PW,118 belongs to Nexperia's VHC logic family, engineered for high-speed, low-power, and robust operation in demanding environments where signal integrity and thermal resilience are critical.

FAQ

What is the maximum clock frequency supported by the 74VHC245PW,118?

The 74VHC245PW,118 does not operate on a clock; it is an asynchronous transceiver. Its usable data rate depends on propagation delay and load capacitance. With 15 pF load and VCC = 5 V, tpd = 3.5 ns (typ), supporting reliable data handshaking up to ~140 MHz (1/2×tpd). System-level timing must account for setup/hold margins and PCB trace effects.

Can the 74VHC245PW,118 interface between 3.3 V and 5 V logic domains?

Yes - its inputs tolerate voltages up to VCC + 0.5 V, and it operates down to 2.0 V. When powered at 3.3 V, it safely accepts 5 V inputs without damage. However, its outputs swing to VCC (3.3 V), so external level-shifting is needed to drive true 5 V CMOS loads. For bidirectional 5 V–3.3 V translation, use dedicated translators like TXB0108.

Is the exposed pad on the TSSOP20 package electrically connected?

No - the exposed pad in SOT360-1 (TSSOP20) is a thermal pad with no electrical function. Nexperia documentation states it has "no electrical or mechanical requirement to solder" and should remain floating or be connected to GND only if thermal performance demands it. Soldering without grounding may cause unintended parasitic coupling.

How does the 74VHC245PW,118 differ from the 74VHCT245PW,118?

The 74VHC245PW,118 uses CMOS input thresholds (VIH ≈ 0.7×VCC), while the 74VHCT245PW,118 uses TTL-compatible thresholds (VIH = 2.0 V min, VIL = 0.8 V max) for direct interfacing with legacy 5 V TTL outputs. Both share identical pinout, package, and output characteristics, but input sensitivity differs - choose VHCT for TTL source compatibility, VHC for pure CMOS systems.