Nexperia USA Inc. 74VHC126D,118

Overview

74VHC126D,118 from Nexperia is a quad non-inverting 3-state buffer/line driver in SO14 package, operating from 2.0 V to 5.5 V with CMOS input levels, 3.3 ns typical propagation delay at 5 V/15 pF, and -40 °C to +125 °C temperature range-used for bus interface isolation and signal level translation in industrial control backplanes.

For engineers reviewing the 74VHC126D,118 datasheet, 74VHC126D,118 pinout, 74VHC126D,118 application, or 74VHC126D,118 equivalent, this page delivers verified pin functions, real-world timing behavior under load, thermal derating curves for SO14, and validated alternatives for TTL- or CMOS-level bus driving scenarios.

Technical Context

The 74VHC126D implements four independent non-inverting buffers, each with active-HIGH 3-state output enable (nOE), enabling simultaneous bus contention management across multiple data lines. Its Si-gate CMOS process ensures LSTTL pin compatibility while supporting rail-to-rail input voltage tolerance up to 7.0 V.

Each channel features Schmitt-trigger inputs for noise immunity, balanced tPLH/tPHL propagation delays (max 7.0 ns at 5 V/15 pF), and output drive capability of ±8 mA at VOH/VOL specifications-critical for reliable signal integrity in mixed-voltage digital systems.

Key Specifications

Pinout & Package

74VHC126D,118 uses the SOT108-1 (SO14) plastic small outline package: 14-pin, 3.9 mm body width, 1.27 mm lead pitch, gull-wing leads, JEDEC MS-012 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74VHC126D,118, the 74VHCT126D,118 extends interoperability with 5 V TTL sources, while SN74LVC126APWR reduces dynamic power by 40% at 3.3 V but sacrifices 5 V tolerance and pin compatibility-making the original optimal for mixed-voltage industrial backplanes.

Availability

74VHC126D,118 is available at Aetrix Electronics and suitable for industrial PLC backplanes, automated test equipment signal routing, medical imaging data acquisition buses, and automotive body control module subsystems requiring stable component supply across extended temperature ranges.

Supply support for 74VHC126D,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, analog, and MOSFET solutions with focus on reliability, efficiency, and manufacturability for industrial and automotive markets.

The 74VHC126D,118 belongs to Nexperia's high-speed CMOS logic family, engineered for pin-compatible replacement of LSTTL devices while delivering lower power, wider voltage operation, and enhanced noise immunity in harsh environments.

FAQ

What is the maximum clock frequency supported by 74VHC126D,118 in a 5 V system?

The 74VHC126D,118 achieves 3.3 ns typical propagation delay at VCC = 5 V and CL = 15 pF, supporting reliable operation up to 100 MHz for single-edge signaling. For clean square-wave generation, derate to 80 MHz to accommodate worst-case 7.0 ns max tpd, PCB trace capacitance, and setup/hold margins in synchronous bus designs.

Can 74VHC126D,118 safely interface a 3.3 V microcontroller with a 5 V peripheral?

Yes-the 74VHC126D,118 accepts input voltages up to 7.0 V regardless of VCC, so its 3.3 V-powered inputs can directly receive 5 V logic signals without damage or level shifting. Outputs swing rail-to-rail (0 V to 3.3 V), requiring an external pull-up or translator if 5 V logic levels are needed at the driven device.

How does thermal derating work for the SO14 package above 100 °C?

For the SOT108-1 (SO14) package, total power dissipation derates linearly at 10.1 mW/K above 100 °C. At 125 °C ambient, Ptot drops to 500 mW − (25 K × 10.1 mW/K) = 247 mW. This constrains maximum toggle frequency or number of simultaneously active buffers in high-temperature enclosures.

Is 74VHC126D,118 suitable for automotive applications?

No-74VHC126D,118 is not AEC-Q100 qualified and lacks automotive-grade screening, burn-in, or extended reliability testing. While it operates from -40 °C to +125 °C, Nexperia explicitly states non-automotive qualification in its legal disclaimers; use 74VHCT126D-Q100 or automotive-qualified alternatives for safety-critical vehicle systems.