Nexperia USA Inc. 74AHC1G125GW-Q100H

Overview

74AHC1G125GW-Q100 from Nexperia is a single 3-state bus buffer/line driver with overvoltage-tolerant inputs (up to 5.5 V), CMOS-level input compatibility, and AEC-Q100 Grade 1 qualification for automotive use. It operates from 2.0 V to 5.5 V supply, delivers ≤7.0 ns propagation delay at 5 V/50 pF, and features symmetrical output impedance for clean signal integrity in bidirectional bus isolation applications.

For engineers reviewing the 74AHC1G125GW-Q100 datasheet, 74AHC1G125GW-Q100 pinout, 74AHC1G125GW-Q100 application, or 74AHC1G125GW-Q100 equivalent, this device serves as a voltage-level translating buffer in CAN/LIN interface sub-circuits, automotive body control modules, infotainment I/O expansion, and sensor data multiplexing where rail-to-rail input tolerance and fast enable/disable timing are critical.

Technical Context

This device implements a non-inverting 3-state buffer with active-low output enable (OE), enabling precise control of signal flow on shared buses. Its overvoltage-tolerant inputs allow interfacing between 3.3 V logic domains and 5 V peripherals without external level shifters.

The logic function follows a strict truth table: when OE = LOW, Y = A; when OE = HIGH, Y = high-impedance (Z). Propagation delays (tpd), enable times (ten), and disable times (tdis) are characterized across -40 °C to +125 °C and multiple VCC/CL conditions, ensuring predictable timing in safety-critical automotive subsystems.

Key Specifications

Pinout & Package

TSSOP5 (SOT353-1) package: plastic thin shrink small outline, 5-lead, 1.25 mm body width, 0.65 mm pitch, exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74AHCT1G125GW-Q100, the AHC version offers superior noise immunity and wider input voltage margin for modern low-voltage MCUs; compared with SN74LVC1G125DBVR, it provides guaranteed automotive reliability and extended temperature operation without derating.

Availability

74AHC1G125GW-Q100 is available at Aetrix Electronics and suitable for automotive body electronics, ADAS sensor interfaces, and infotainment subsystems requiring stable component supply across long production lifecycles.

Supply support for 74AHC1G125GW-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.

This device belongs to Nexperia's AEC-Q100-qualified 74AHC logic family, engineered specifically for robust signal buffering in automotive electronic control units where voltage translation, timing predictability, and environmental resilience are mandatory.

FAQ

What is the maximum input voltage the 74AHC1G125GW-Q100 can tolerate when VCC = 3.3 V?

The device supports overvoltage-tolerant inputs up to 5.5 V regardless of VCC level. When powered from 3.3 V, it safely accepts 5 V signals on pin A or OE without damage or functional degradation - a key enabler for mixed-voltage interconnects in automotive domains.

Does the 74AHC1G125GW-Q100 require external pull-up or pull-down resistors on its control pins?

OE and A have no internal terminations. OE must be actively driven or externally pulled LOW to enable Y; floating OE results in undefined output state. A should be terminated if sourced by high-impedance nodes. Typical values: 10 kΩ pull-down on OE, 100 kΩ pull-up/down on A depending on source impedance.

How does the TSSOP5 (SOT353-1) package affect thermal performance in continuous operation?

The SOT353-1 package has a thermal resistance θ_JA of ~220 K/W. At 250 mW max power dissipation, junction temperature rise exceeds safe limits above ambient ~50 °C. For sustained 8 mA output drive, limit duty cycle or add copper pour under pin 3 (GND) to improve heat spreading.

Can the 74AHC1G125GW-Q100 be used in bidirectional data paths like I²C?

No - it is a unidirectional non-inverting buffer. While OE controls directionality, the internal architecture lacks true bidirectional capability (e.g., no automatic direction sensing or bus contention detection). For I²C, dedicated bidirectional buffers such as PCA9306 or TXS0108E are required.