Nexperia USA Inc. 74HC1G125GV,125

Overview

74HC1G125GV,125 from Nexperia is a single 3-state bus buffer/line driver in SC-74A (SOT753) package, operating from 2.0 V to 6.0 V supply, with CMOS-level input compatibility, ±35 mA output drive, and −40 °C to +125 °C temperature range. It enables bidirectional bus isolation in low-pin-count digital interfaces such as I²C level-shifting, microcontroller GPIO expansion, and sensor data multiplexing.

For engineers reviewing the 74HC1G125GV,125 datasheet, 74HC1G125GV,125 pinout, 74HC1G125GV,125 application, or 74HC1G125GV,125 equivalent, key selection criteria include 3-state control timing (t_en/t_dis ≤ 38 ns at V_CC = 4.5 V), input clamp diode support for overvoltage-tolerant interfacing, and SC-74A footprint compatibility with space-constrained PCB layouts.

Technical Context

This device implements a single non-inverting buffer with active-low 3-state enable (OE), supporting high-impedance output disable for bus contention avoidance. Its CMOS input structure provides rail-to-rail voltage recognition and high noise immunity (≥40% V_CC noise margin), while symmetrical output impedance ensures matched rise/fall times.

Propagation delay is tightly controlled across voltage and temperature: 10 ns typical (25 °C, V_CC = 4.5 V, C_L = 50 pF), with enable/disable delays under 38 ns. Input clamping diodes allow safe interface to signals exceeding V_CC when used with current-limiting resistors - a critical feature for mixed-voltage system interconnects.

Key Specifications

Pinout & Package

74HC1G125GV,125 uses the SC-74A (SOT753) surface-mount package: 5-lead, 1.3 mm × 1.7 mm body, 0.95 mm lead pitch, and 0.26 mm nominal thickness - optimized for high-density routing and automated placement.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LVC1G125GW,125 and SN74AUP1G125DBVR, the 74HC1G125GV,125 offers unique 6 V tolerance, integrated input clamps, and extended temperature qualification - making it the only option among the three for ruggedized industrial bus isolation where voltage margin and reliability are primary constraints.

Availability

74HC1G125GV,125 is available at Aetrix Electronics and suitable for industrial sensor hubs, I²C level-shifting circuits, microcontroller GPIO expansion, and legacy parallel interface isolation requiring stable component supply across extended temperature ranges.

Supply support for 74HC1G125GV,125 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 emphasis on reliability, efficiency, and manufacturability for industrial and consumer electronics.

The 74HC1G125GV,125 belongs to Nexperia's 74HC logic family - designed specifically for robust, low-power bus interfacing in space-constrained and thermally demanding embedded systems.

FAQ

Can 74HC1G125GV,125 interface a 5 V signal to a 3.3 V microcontroller input?

Yes - its input clamp diodes allow safe connection of signals up to V_CC + 0.5 V. With V_CC = 3.3 V, a 5 V input can be applied through a series current-limiting resistor (e.g., 10 kΩ), limiting I_IK to <20 mA per datasheet Table 5. This avoids external level-shifter components while maintaining logic-level compatibility.

What is the maximum capacitive load this device can drive reliably?

The device is characterized up to 50 pF (Table 9), with propagation delay increasing to 125 ns at V_CC = 2.0 V and C_L = 50 pF. For reliable operation beyond 50 pF, derate timing margins: at 100 pF, t_pd increases ~2.2×, and output current remains within ±35 mA limit only if VO stays within 0.16–0.33 V (VOL) or 5.2–5.81 V (VOH) per Table 7.

Does 74HC1G125GV,125 support hot-swap insertion on a live bus?

No - it lacks powered-off protection (I_OFF specification). When V_CC = 0 V, inputs and outputs may conduct if external voltages exceed GND or float above −0.5 V, risking back-powering or latch-up. Use only in systems where power sequencing ensures V_CC is stable before applying input signals.

How does the 3-state enable timing affect I²C bus arbitration?

t_en ≤ 38 ns and t_dis ≤ 38 ns (V_CC = 4.5 V) ensure the output transitions within one I²C standard-mode bit period (10 μs), preventing bus contention during master handover. OE must be asserted synchronously with SCL low to avoid glitches - verified in functional testing per Figure 7 waveforms.