Nexperia USA Inc. 74VHC126PW,118

Overview

74VHC126PW,118 from Nexperia is a quad non-inverting 3-state buffer/line driver in TSSOP14 package, operating from 2.0 V to 5.5 V with CMOS input levels, propagation delay as low as 3.3 ns (VCC = 4.5–5.5 V, CL = 15 pF), and specified for -40 °C to +125 °C industrial temperature range. It serves as a bidirectional bus interface or level-shifting driver in digital logic systems requiring controlled output enable.

For engineers reviewing the 74VHC126PW,118 datasheet, 74VHC126PW,118 pinout, 74VHC126PW,118 application, or 74VHC126PW,118 equivalent, key selection criteria include 3-state output timing (enable/disable times ≤ 9.5 ns), input voltage tolerance beyond VCC, Schmitt-trigger input hysteresis, and thermal performance in TSSOP14 at 125 °C ambient.

Technical Context

This device implements four independent non-inverting buffers, each with an active-HIGH output enable (nOE) controlling high-impedance OFF-state on the corresponding nY output. All inputs accept voltages up to 7.0 V regardless of VCC, enabling mixed-voltage interfacing.

It uses Si-gate CMOS technology compliant with JEDEC Std 7-A, pin-compatible with LSTTL, and features balanced tPLH/tPHL propagation delays, input clamping diodes, and ESD protection exceeding 2000 V HBM and 1000 V CDM.

Key Specifications

Pinout & Package

TSSOP14 plastic thin shrink small outline package (SOT402-1), 14-lead, body width 4.4 mm, 0.65 mm pitch, exposed pad not present, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad 3-state buffer applications.

Compared with 74VHC126PW,118, the 74VHCT126PW,118 offers stricter TTL input compatibility at the cost of reduced supply flexibility, while SN74LVC126APWR delivers lower static power and faster drive at 3.3 V but sacrifices input overvoltage resilience and 5 V operation.

Availability

74VHC126PW,118 is available at Aetrix Electronics and suitable for industrial automation controllers, automotive body control modules, and telecom infrastructure equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74VHC126PW,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 focused on essential efficiency technologies, delivering high-performance logic, analog, and discrete components with emphasis on reliability, energy efficiency, and automotive-grade quality.

The 74VHC series targets industrial and consumer digital systems needing robust, pin-compatible upgrades to legacy TTL logic, with design emphasis on wide supply range, noise immunity, and thermal stability in compact packages.

FAQ

What is the maximum clock frequency supported by 74VHC126PW,118 in a data bus application?

The device does not operate as a clock generator, but its 3.3 ns propagation delay (VCC = 4.5–5.5 V, CL = 15 pF) supports reliable data transfer up to approximately 120 MHz in point-to-point configurations. For bus applications with 50 pF load, the 7.5 ns max tpd limits practical throughput to ≤80 MHz while maintaining setup/hold margins. Timing must be verified per actual board layout and load.

Can 74VHC126PW,118 safely interface a 5 V microcontroller with a 3.3 V FPGA?

Yes - its inputs tolerate up to 7.0 V regardless of VCC, allowing direct connection from 5 V MCU outputs. When powered at 3.3 V, outputs swing 0–3.3 V, compatible with FPGA I/O banks configured for LVCMOS33. No external level shifters are required, provided the FPGA input clamp diodes are not engaged and VIH/VIL thresholds are met.

Does the TSSOP14 package require thermal vias or special PCB layout for +125 °C operation?

No thermal vias are required, but PCB layout must minimize thermal resistance: use ≥2 cm² copper pour connected to pin 7 (GND) and pin 14 (VCC), place 100 nF ceramic decoupling capacitors within 1 cm of VCC/GND pins, and avoid routing high-current traces near the package. Derating begins at 81 °C (7.3 mW/K), so total dissipation must stay below 350 mW at 125 °C ambient.

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

Each input exhibits ~0.35 V hysteresis (e.g., VIH ≈ 1.9 V, VIL ≈ 1.55 V at VCC = 3.0 V), meaning a rising signal must exceed VIH to register HIGH, and must fall below VIL to register LOW - preventing multiple toggles on slow or noisy edges. This eliminates false triggering from EMI on reset lines, pushbutton inputs, or long PCB traces without external RC filtering.