Nexperia USA Inc. 74AHCT125PW-Q100,1

Overview

74AHCT125PW-Q100 from Nexperia is an automotive-grade quad 3-state buffer/line driver with TTL-compatible inputs, operating from 4.5 V to 5.5 V supply, featuring 3.0 ns typical propagation delay at 5 V/15 pF, overvoltage-tolerant inputs up to 5.5 V, and AEC-Q100 Grade 1 qualification (−40 °C to +125 °C). It serves as a level-translating bus driver in automotive infotainment and body control modules.

For engineers reviewing the 74AHCT125PW-Q100 datasheet, 74AHCT125PW-Q100 pinout, 74AHCT125PW-Q100 application, or 74AHCT125PW-Q100 equivalent, this page delivers verified electrical parameters, TSSOP14 package layout, automotive thermal and ESD specs (HBM >2000 V), and direct substitution guidance for mixed-voltage signal routing in ADAS sensor interfaces and CAN subsystems.

Technical Context

This device implements four independent non-inverting buffers, each with active-low 3-state output enable (nOE) controlling high-impedance output states. Input logic thresholds are TTL-compatible (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V), enabling direct interfacing with legacy 5 V microcontrollers and FPGAs.

Propagation delays (tpd ≤ 7.5 ns at 5 V/50 pF) and matched enable/disable timing (ten ≤ 9.5 ns, tdis ≤ 11.0 ns) ensure deterministic bus arbitration in time-critical automotive data paths. Schmitt-trigger inputs are not present-only standard TTL input thresholds apply per datasheet Table 9.

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 optional for thermal enhancement.

Key Features

Applications

Equivalent & Alternatives

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

Compared with the 74AHCT125PW-Q100, the D-Q100 offers legacy SOIC compatibility but larger size and lower thermal efficiency, while the BQ-Q100 delivers superior miniaturization and AOI support at the cost of reflow process complexity-making the PW-Q100 the optimal balance of manufacturability, thermal performance, and board-space efficiency for mid-volume automotive production.

Availability

74AHCT125PW-Q100 is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS sensor interfaces, and body control modules requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for 74AHCT125PW-Q100 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 optimized for automotive, industrial, and mobile markets.

The 74AHCT125-Q100 series belongs to Nexperia's automotive-qualified logic portfolio, designed specifically for robust signal routing and voltage translation in harsh-temperature automotive subsystems where reliability and AEC-Q100 compliance are mandatory.

FAQ

Is the 74AHCT125PW-Q100 pin-compatible with standard 74HC125 or 74LS125 devices?

No. While functionally similar as quad 3-state buffers, the 74AHCT125PW-Q100 uses TTL input thresholds (VIH = 2.0 V min), unlike 74HC125 (CMOS thresholds) and 74LS125 (different output drive and propagation characteristics). Pinout matches standard 14-pin logic packages (TSSOP14), but electrical behavior differs-direct replacement requires validation of input voltage compatibility and timing margins.

Can the 74AHCT125PW-Q100 operate reliably at 3.3 V supply?

No. The 74AHCT125 variant is specified only for 4.5 V to 5.5 V operation per Table 5. At 3.3 V, VIH and VIL thresholds fall outside guaranteed range, risking logic misreads. For 3.3 V systems, use the 74AHC125PW-Q100 variant instead, which supports 2.0–5.5 V and CMOS input levels.

What is the maximum capacitive load the 74AHCT125PW-Q100 can drive while maintaining timing specs?

The datasheet guarantees timing (tpd ≤ 7.5 ns, ten ≤ 9.5 ns) up to 50 pF load capacitance at VCC = 5 V. Driving >50 pF increases propagation delay nonlinearly and may exceed 11.5 ns max tpd at 125 °C. For >50 pF loads, add series termination or reduce trace length to maintain signal integrity and setup/hold timing.

Does the TSSOP14 package (SOT402-1) require solder paste on the exposed thermal pad?

No. The SOT402-1 package does not include an exposed thermal pad-the datasheet specifies no thermal pad in its mechanical drawing (Fig. 8). Thermal dissipation relies on leads and PCB copper; no thermal vias or pad soldering is required or recommended for this variant.