Nexperia USA Inc. 74HC125PW-Q100J

Overview

74HC125PW-Q100 from Nexperia is an automotive-qualified quad buffer/line driver with 3-state outputs, designed for bus interface and signal isolation in automotive control modules. It operates across 2.0 V to 6.0 V supply, supports -40 °C to +125 °C ambient range, and features CMOS-level inputs with ±35 mA output drive capability. Used in engine control units (ECUs) for isolating microcontroller GPIOs from noisy sensor or actuator buses.

For engineers reviewing the 74HC125PW-Q100 datasheet, 74HC125PW-Q100 pinout, 74HC125PW-Q100 application, or 74HC125PW-Q100 equivalent, key selection criteria include 3-state enable timing (t_en = 15 ns typ @ 4.5 V), input voltage compatibility (VIH = 3.15 V min @ VCC = 4.5 V), AEC-Q100 Grade 1 qualification, and TSSOP14 thermal derating (7.3 mW/K above 81 °C).

Technical Context

This device implements four independent non-inverting buffers, each with active-low 3-state output enable (nOE). Each channel's output enters high-impedance OFF-state when its dedicated nOE pin is HIGH, enabling bidirectional bus sharing without contention.

Input clamp diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors. Static characteristics are specified across -40 °C to +125 °C, with VOH ≥ 3.98 V and VOL ≤ 0.26 V at IO = ±6.0 mA and VCC = 4.5 V - ensuring robust logic level translation in automotive power domains.

Key Specifications

Pinout & Package

TSSOP14 plastic thin shrink small outline package (SOT402-1); 14-lead, 4.4 mm body width; 0.65 mm lead pitch; optimized for automated SMT assembly and thermal performance in compact automotive PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC125PW-Q100, the 74HCT125PW-Q100 offers easier integration with legacy 5 V logic but sacrifices input noise margin, while SN74LVC125APWREP delivers faster speed and better ESD at the cost of voltage and temperature range - making the HC variant optimal for mixed-voltage, high-temp automotive bus isolation.

Availability

74HC125PW-Q100 is available at Aetrix Electronics and suitable for engine control units, body control modules, and ADAS sensor interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HC125PW-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 delivering high-performance logic, discrete, and MOSFET solutions with focus on automotive, industrial, and mobile applications.

The 74HC125-Q100 belongs to Nexperia's automotive logic portfolio, engineered specifically for robust signal buffering and bus isolation in harsh-temperature vehicle subsystems.

FAQ

What is the maximum output current per channel for 74HC125PW-Q100?

The absolute maximum DC output current per channel is ±35 mA, as defined in Table 4 (Limiting Values). Continuous operation at this level requires adherence to thermal derating curves: for the TSSOP14 package, total power dissipation must be reduced by 7.3 mW/K above 81 °C ambient to maintain reliability.

Can 74HC125PW-Q100 interface directly with 5 V logic while powered from 3.3 V?

No - the device does not support mixed-voltage operation. When VCC = 3.3 V, VIH minimum is 2.1 V (74HC variant), which may not reliably recognize 5 V inputs. For 5 V-tolerant inputs, external clamping or level-shifting circuitry is required, as the internal clamp diodes only protect against brief overvoltage events, not sustained 5 V signals.

How does the 3-state enable timing affect bus arbitration in multi-master systems?

With typical enable/disable times of 15 ns at VCC = 4.5 V, the 74HC125PW-Q100 ensures sub-20 ns transition between driven and high-Z states. This minimizes bus float duration during master handoff, reducing risk of metastability or false edge detection in protocols like LIN or proprietary wake-up signaling.

Is the TSSOP14 package (SOT402-1) compatible with standard SO14 footprints?

No - the TSSOP14 (SOT402-1) has 0.65 mm lead pitch and 4.4 mm body width, whereas SO14 (SOT108-1) uses 1.27 mm pitch and 3.9 mm width. They are mechanically incompatible; PCB layout and stencil design must match SOT402-1 dimensions, including tighter solder mask and land pattern tolerances.