Nexperia USA Inc. 74LVT126PW,118

Overview

74LVT126PW,118 from Nexperia is a 3.3 V quad non-inverting 3-state buffer with bus-hold inputs, IOFF partial power-down protection, and ±64 mA/–32 mA output drive. It operates from 2.7 V to 3.6 V, accepts 5.5 V-tolerant inputs, and functions across –40 °C to +85 °C for mixed-voltage board interfacing in industrial control backplanes.

For engineers reviewing the 74LVT126PW,118 datasheet, 74LVT126PW,118 pinout, 74LVT126PW,118 application, or 74LVT126PW,118 equivalent, this device supports live insertion, TTL-level compatibility, high-impedance bus isolation, and robust ESD protection (HBM >2000 V, CDM >1000 V) in space-constrained TSSOP14 layouts.

Technical Context

This BiCMOS logic device implements four independent non-inverting buffers, each controlled by dedicated active-low output enable (nOE) inputs. Its IOFF circuitry disables outputs and blocks reverse current when VCC = 0 V, enabling safe partial power-down in multi-rail systems.

Bus-hold inputs eliminate external pull-ups by maintaining last-valid logic state at unused pins, while overvoltage-tolerant inputs (up to 5.5 V) allow direct interfacing with 5 V buses without level shifters. Propagation delays are as low as 1.0 ns (tPLH/tPHL @ 3.3 V), supporting high-speed data routing in synchronous digital subsystems.

Key Specifications

Pinout & Package

TSSOP14 package (SOT402-1): 4.4 mm body width, 0.65 mm lead pitch, 14-terminal surface-mount outline optimized for automated placement and thermal dissipation in dense PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC126APW and 74ALVC126PW, the 74LVT126PW,118 uniquely combines 5.5 V input tolerance, IOFF protection, and bus-hold-making it the sole option for robust mixed-voltage backplane interfaces requiring live insertion and partial power-down compliance.

Availability

74LVT126PW,118 is available at Aetrix Electronics and suitable for industrial backplane interfaces, legacy bus extensions, hot-swappable module control, and embedded test access ports requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for 74LVT126PW,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 high-volume, high-reliability logic, analog, and MOSFET solutions for industrial, automotive, and consumer markets.

The 74LVT series targets high-speed, mixed-voltage digital interfacing applications-designed specifically for robust bus buffering, level translation, and hot-plug-capable system architectures.

FAQ

Does 74LVT126PW,118 support live insertion into a powered 5 V backplane?

Yes. Its 5.5 V-tolerant inputs, IOFF circuitry, and bus-hold functionality allow safe insertion while the backplane remains energized. The device prevents backfeeding current when VCC is unpowered, and its HBM >2000 V ESD rating withstands contact discharge during mating.

Can 74LVT126PW,118 drive a 50 pF load at 10 MHz without signal degradation?

Yes. With tPLH/tPHL ≤ 3.9 ns (max) at 3.3 V and output drive of +64 mA/–32 mA, it maintains clean edges into 50 pF loads at frequencies up to 250 MHz. Table 9 confirms stable switching with CL = 50 pF and RL = 500 Ω under recommended conditions.

What is the purpose of the bus-hold feature, and how does it affect unused inputs?

Bus-hold circuitry actively maintains the last-valid logic state on unterminated inputs using weak feedback transistors. For unused inputs, this eliminates external pull-up/pull-down resistors-reducing BOM cost and PCB area while preventing floating-node metastability in noisy industrial environments.

Is 74LVT126PW,118 pin-compatible with older 74LVT126 variants in SO14 or DHVQFN packages?

Yes. All 74LVT126 variants-including SO14 (SOT108-1), TSSOP14 (SOT402-1), and DHVQFN14 (SOT762-1)-share identical pin numbering and logic function. Only package dimensions and thermal characteristics differ; no schematic or layout changes are needed when migrating to the TSSOP14 variant.