Nexperia USA Inc. 74AHC126PW,118

Overview

74AHC126PW,118 from Nexperia is a quad non-inverting buffer/line driver with 3-state outputs, designed for bus-oriented bidirectional data transmission in mixed-voltage systems. It features CMOS-level input compatibility (VIH ≥ 3.85 V at VCC = 5.5 V), ±25 mA output drive, 3.3 ns typical propagation delay at 5 V/15 pF, and overvoltage-tolerant inputs enabling level translation between 3.3 V and 5 V domains in industrial control backplanes.

For engineers reviewing the 74AHC126PW,118 datasheet, 74AHC126PW,118 pinout, 74AHC126PW,118 application, or 74AHC126PW,118 equivalent, key selection criteria include 3-state enable timing (tdis ≤ 9.5 ns), input overvoltage tolerance up to 7.0 V, guaranteed operation from -40 °C to +125 °C, and TSSOP14 package thermal performance (7.3 mW/K derating above 81 °C).

Technical Context

This device implements four independent non-inverting buffers, each with an active-HIGH output enable (nOE) controlling high-impedance OFF-state. All inputs incorporate Schmitt-trigger action for noise immunity and accept voltages up to 7.0 V regardless of VCC, supporting voltage translation without external components.

It operates across 2.0 V–5.5 V supply range with CMOS input thresholds (VIH = 3.85 V min at VCC = 5.5 V), delivers VOH ≥ 3.70 V at IO = -8 mA, and maintains VOL ≤ 0.55 V at IO = 8 mA - ensuring robust logic margins in noisy industrial environments.

Key Specifications

Pinout & Package

TSSOP14 plastic thin shrink small outline package (SOT402-1); 14 leads; body width 4.4 mm; 0.65 mm pitch; exposed pad optional for thermal enhancement.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74AHCT126PW,118, the 74AHC126PW,118 provides superior noise immunity via higher VIH and Schmitt-trigger inputs but requires tighter VCC regulation in 5 V systems; versus SN74LVC126APW, it trades lower static power for broader voltage flexibility and industrial temperature support.

Availability

74AHC126PW,118 is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, medical infusion pump UIs, and test equipment signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74AHC126PW,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 MOSFET solutions for automotive, industrial, and consumer markets.

The 74AHC series targets high-speed, low-power digital interface applications where robust voltage translation, wide temperature operation, and noise-immune inputs are critical - especially in industrial automation and automotive subsystems.

FAQ

Can 74AHC126PW,118 operate with VCC = 2.5 V while accepting 5 V inputs?

Yes. The device's overvoltage-tolerant inputs permit VI up to 7.0 V independent of VCC, so 5 V signals may be applied safely at VCC = 2.5 V. Static characteristics confirm VIH = 1.75 V min and VIL = 0.75 V max at VCC = 2.5 V, ensuring reliable logic recognition without level shifting.

What is the maximum capacitive load this device can drive at 50 MHz?

At 50 MHz, CL must remain ≤ 30 pF to maintain tpd ≤ 7.5 ns and avoid excessive rise/fall time degradation. Dynamic data shows tpd = 7.5 ns max at CL = 50 pF and VCC = 5.5 V, implying usable bandwidth exceeds 100 MHz for moderate loads; for 50 MHz square waves, 30 pF keeps edge fidelity within 10% overshoot limits.

Is the exposed thermal pad on the TSSOP14 package electrically connected?

No. The exposed pad in SOT402-1 is a mechanical thermal slug only, with no internal electrical connection. Nexperia documentation states it may be left floating or soldered to GND for improved thermal performance, but doing so does not affect electrical functionality or pin assignments.

How does the 3-state disable time compare between 74AHC126PW,118 and 74LVC126?

74AHC126PW,118 specifies tdis ≤ 9.5 ns at VCC = 5.5 V and CL = 50 pF, while SN74LVC126APW specifies tdis ≤ 7.5 ns under identical conditions. The AHC variant prioritizes voltage flexibility and noise immunity over absolute speed, making it preferable in mixed-voltage systems despite slightly longer disable latency.