Nexperia USA Inc. 74ALVC125D,112

Overview

74ALVC125D,112 from Nexperia is a quad non-inverting 3-state buffer/line driver in SO14 (SOT108-1) package, operating from 1.65 V to 3.6 V supply. It features Schmitt-trigger inputs for noise immunity, IOFF partial power-down protection, and guaranteed operation from –40 °C to +125 °C. Used in bus interface isolation, level translation, and data routing in industrial control backplanes.

For engineers reviewing the 74ALVC125D,112 datasheet, 74ALVC125D,112 pinout, 74ALVC125D,112 application, or 74ALVC125D,112 equivalent, key selection criteria include 3-state timing (tpd ≤ 3.2 ns at 3.6 V), IOFF leakage (< ±80 μA at VCC = 0 V), input overvoltage tolerance to 3.6 V, and thermal robustness across extended temperature range.

Technical Context

This device implements four independent non-inverting buffers, each with active-low 3-state enable (nOE). Each channel accepts TTL-compatible inputs and drives CMOS loads with rail-to-rail output swing under specified load conditions.

Schmitt-trigger input thresholds provide hysteresis (ΔV ≈ 0.3–0.5 V depending on VCC), enabling reliable operation with slow-edge signals. The IOFF circuit actively disables outputs during power-down, blocking reverse current flow even when inputs remain asserted at valid logic levels.

Key Specifications

Pinout & Package

74ALVC125D,112 uses the SO14 plastic small outline package (SOT108-1), 14-pin, 3.9 mm body width, with standard 1.27 mm lead pitch and gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC125APWR, 74ALVC125D,112 offers verified IOFF protection critical for hot-swap reliability; versus 74LVC125AD,118, it trades package size for easier hand-soldering and legacy board compatibility while retaining full functional equivalence.

Availability

74ALVC125D,112 is available at Aetrix Electronics and suitable for industrial PLC backplanes, embedded microcontroller bus isolation, and automated test equipment signal routing requiring stable component supply across extended temperature ranges.

Supply support for 74ALVC125D,112 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 optimized for efficiency, reliability, and manufacturability in high-volume applications.

The ALVC logic family targets high-speed, low-power, mixed-voltage interfacing in industrial, automotive (non-safety), and computing infrastructure - emphasizing robustness under partial power-down and wide supply flexibility.

FAQ

What is the maximum clock frequency supported by 74ALVC125D,112?

The device does not operate as a clocked element but as a combinational buffer. Its propagation delay (tpd ≤ 3.2 ns at 3.6 V) supports data toggling up to approximately 300 MHz in point-to-point configurations with controlled trace impedance and 50 pF load. Maximum usable frequency depends on system-level signal integrity, not internal clocking.

Can 74ALVC125D,112 safely interface a 1.8 V FPGA with a 3.3 V ADC?

Yes - its inputs tolerate up to 3.6 V regardless of VCC, and its outputs swing rail-to-rail (VOH ≥ VCC − 0.2 V, VOL ≤ 0.45 V at 24 mA). With VCC = 1.8 V, outputs meet 1.8 V logic thresholds; with VCC = 3.3 V, outputs drive 3.3 V ADC inputs directly. No external level shifter is needed.

Does 74ALVC125D,112 require external pull-up or pull-down resistors on nOE pins?

No - nOE inputs have CMOS-compatible thresholds and negligible leakage (±0.1 μA typical). However, for deterministic startup behavior, tie unused nOE pins to GND (to enable) or VCC (to disable) via short PCB traces. Floating nOE pins may cause undefined output states during power ramp.

How does the IOFF feature behave when VCC = 0 V and inputs are held at 3.6 V?

When VCC = 0 V, the IOFF circuit actively disables all outputs, limiting backfeed current to ≤ ±80 μA even with inputs at 3.6 V. This prevents damage to powered-down sections and avoids false logic states on shared buses - confirmed per JESD78 Class II.A latch-up testing and absolute maximum ratings.