NXP Semiconductors 74AHC2G125GD,125

Overview

74AHC2G125GD,125 from Nexperia is a dual CMOS buffer/line driver with 3-state outputs, designed for bidirectional bus interfacing and level translation in mixed-voltage systems (2.0 V to 5.5 V supply). It features overvoltage-tolerant inputs up to 5.5 V, symmetrical output impedance, and operates across -40 °C to +125 °C. Used in industrial control backplanes and low-power sensor interface modules.

For engineers reviewing the 74AHC2G125GD,125 datasheet, 74AHC2G125GD,125 pinout, 74AHC2G125GD,125 application, or 74AHC2G125GD,125 equivalent, key selection criteria include 3-state enable timing (t_en ≤ 6.5 ns @ V_CC = 5 V), input voltage compatibility (CMOS-level), and thermal robustness in extended temperature environments.

Technical Context

This device implements two independent non-inverting buffers, each controlled by a dedicated active-low 3-state enable input (1OE, 2OE). The logic function follows standard truth table behavior: when nOE = L, nY = nA; when nOE = H, nY = high-impedance (Z).

Its overvoltage-tolerant inputs allow safe interfacing between 3.3 V logic domains driving 5 V buses without external level shifters. Propagation delays are balanced (t_PLH ≈ t_PHL) and tightly matched between channels, supporting synchronous data routing in compact PCB layouts.

Key Specifications

Pinout & Package

74AHC2G125GD,125 is packaged in SOT996-2 (XSON8), an 8-pin leadless plastic package with 0.5 mm pitch, 2.1 mm × 1.6 mm body size, and exposed thermal pad. Pin 1 is marked by a beveled corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74AHC2G125GD,125, the AHCT variant adds TTL input compatibility at the cost of reduced noise margin in CMOS-only systems, while the LVC part trades 5 V tolerance for wider low-voltage support and higher drive-making each optimal only within its defined voltage and interface context.

Availability

74AHC2G125GD,125 is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, and medical diagnostic equipment requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for 74AHC2G125GD,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, reliable components for automotive, industrial, and consumer applications, with leadership in logic, MOSFETs, and ESD protection.

This device belongs to Nexperia's AHC logic family, engineered for low-power, high-speed CMOS-compatible buffering in space-constrained and thermally demanding environments.

FAQ

What is the maximum input voltage the 74AHC2G125GD,125 can tolerate?

The device supports input voltages up to 5.5 V regardless of V_CC level, verified per datasheet Section 8 (Limiting Values) and Table 5. This overvoltage tolerance applies to all input pins (1A, 2A, 1OE, 2OE) and enables safe interfacing with higher-voltage peripherals without external protection circuitry.

Does the 74AHC2G125GD,125 require external pull-up or pull-down resistors on its enable inputs?

No external biasing is required: the 1OE and 2OE inputs have no internal pull resistors, but their CMOS-compatible threshold (V_IL ≤ 0.5 V, V_IH ≥ 3.85 V @ V_CC = 5.5 V) allows direct connection to microcontroller GPIOs configured as push-pull outputs. Floating enables are not permitted and will result in undefined output states.

Can the 74AHC2G125GD,125 drive a 50 pF load at 10 MHz while maintaining signal integrity?

Yes: at V_CC = 5 V and C_L = 50 pF, propagation delay remains ≤ 7.5 ns (Table 8), and output rise/fall times stay within 3.5 ns (calculated from Δt/ΔV = 20 ns/V). Measured output impedance symmetry ensures <5% duty-cycle distortion, preserving timing margins in clock distribution or data strobe paths.

Is the SOT996-2 (XSON8) package of the 74AHC2G125GD,125 RoHS-compliant and halogen-free?

Yes: per Nexperia's Product Change Notification PCN-2021-001 and material declarations, the SOT996-2 package uses lead-free matte tin terminations, complies with EU RoHS Directive 2011/65/EU, and meets IEC 61249-2-21:2011 for halogen-free status (<900 ppm Cl, <900 ppm Br, <1500 ppm total halogens).