Nexperia USA Inc. 74AHC125BQ,115

Overview

74AHC125BQ,115 from Nexperia is a quad non-inverting 3-state buffer/line driver in DHVQFN14 package, operating from 2.0 V to 5.5 V supply, with overvoltage-tolerant inputs up to 5.5 V and propagation delay as low as 3.0 ns (VCC = 5.0 V, CL = 15 pF). It enables bidirectional bus isolation in mixed-voltage digital systems such as industrial I/O expansion and FPGA peripheral interfacing.

For engineers reviewing the 74AHC125BQ,115 datasheet, 74AHC125BQ,115 pinout, 74AHC125BQ,115 application, or 74AHC125BQ,115 equivalent, this device supports voltage translation between 3.3 V and 5 V domains, delivers balanced tPLH/tPHL timing, maintains high noise immunity via Schmitt-trigger inputs, and meets JESD 78 Class II latch-up and JS-001 HBM ESD requirements.

Technical Context

The 74AHC125BQ,115 implements four independent CMOS-level-controlled buffers, each with active-low 3-state output enable (nOE) that drives outputs to high-impedance when HIGH. Its input stage accepts voltages up to 5.5 V regardless of VCC, enabling safe interfacing between higher-voltage logic and lower-supply ICs.

All inputs feature Schmitt-trigger action for robust noise rejection, and the device is specified across -40 °C to +125 °C ambient temperature. Propagation delay variation is minimized by matched internal path lengths, and static drive strength is characterized at ±8 mA output current with guaranteed VOH/VOL across full voltage and temperature range.

Key Specifications

Pinout & Package

DHVQFN14 (SOT762-1) package: 2.5 mm × 3.0 mm × 0.85 mm body, 0.5 mm pitch, 14 terminals, exposed thermal pad (non-soldered or floating GND), no leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74AHCT125BQ,115, the AHC version provides superior noise immunity in CMOS systems but requires higher input voltage for HIGH recognition; versus SN74LVC125APW, it trades 3.3 V optimization for universal 2–5.5 V compatibility and overvoltage resilience.

Availability

74AHC125BQ,115 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, FPGA peripheral interface, automotive body control modules, and test equipment signal routing requiring stable component supply across extended temperature ranges.

Supply support for 74AHC125BQ,115 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 high-volume, high-reliability logic, analog, and discrete components, serving industrial, automotive, and consumer markets with scalable manufacturing and rigorous qualification.

The 74AHC125BQ,115 belongs to Nexperia's AHC logic family, engineered for low-power, high-speed CMOS-compatible buffering in mixed-voltage embedded systems where robustness, timing precision, and thermal efficiency are critical.

FAQ

Can 74AHC125BQ,115 operate with VCC = 2.5 V while accepting 5 V inputs?

Yes. The device supports VCC from 2.0 V to 5.5 V and tolerates input voltages up to 5.5 V regardless of supply level. At VCC = 2.5 V, VIH is guaranteed ≥1.7 V and VIL ≤0.7 V per datasheet Table 6, ensuring reliable switching with 5 V inputs while maintaining CMOS-compatible output swing referenced to 2.5 V.

What is the thermal pad connection requirement for SOT762-1 package?

The exposed thermal pad (terminal 1 index area) has no electrical function and must not be soldered to GND unless explicitly designed as a thermal path. If soldered, the land must remain electrically floating or connect to GND - never to VCC or signal nets. Thermal performance improves ~30 % with proper pad exposure and solder paste stencil design.

How does propagation delay vary with load capacitance and supply voltage?

At VCC = 5.0 V, tPD is 3.0 ns (typ) for CL = 15 pF and 4.3 ns (typ) for CL = 50 pF. At VCC = 3.3 V, tPD increases to 4.4 ns (typ, CL = 15 pF) and 6.2 ns (typ, CL = 50 pF). This linear dependence reflects CMOS gate delay scaling inversely with VCC and proportionally with CL, consistent with datasheet Table 7.

Is 74AHC125BQ,115 qualified for automotive applications?

No. While rated for -40 °C to +125 °C, this part is not AEC-Q100 qualified and lacks automotive-specific stress testing, failure analysis, or PPAP documentation. Nexperia explicitly states non-automotive qualification unless designated "A" suffix (e.g., 74AHC125BQJ); use only in non-safety-critical auxiliary systems at customer's own risk.