Nexperia USA Inc. 74AHC1G126GW,125

Overview

74AHC1G126GW,125 from Nexperia is a single CMOS bus buffer/line driver with 3-state output and overvoltage-tolerant inputs (up to 5.5 V), enabling level translation in mixed-voltage systems. It operates from 2.0 V to 5.5 V, delivers propagation delay as low as 3.4 ns at 5 V/15 pF, supports −40 °C to +125 °C ambient range, and features symmetrical output impedance for clean signal integrity in data path isolation applications.

For engineers reviewing the 74AHC1G126GW,125 datasheet, 74AHC1G126GW,125 pinout, 74AHC1G126GW,125 application, or 74AHC1G126GW,125 equivalent, this device is selected for high-speed digital interface buffering where supply voltage flexibility, rail-to-rail input tolerance, and low-power 3-state control are required - especially in industrial I/O expansion, sensor hub signal routing, and FPGA peripheral interfacing.

Technical Context

This logic buffer implements a non-inverting 3-state output controlled by an active-low enable input (OE). Its CMOS input threshold scales with VCC (VIH = 0.7×VCC min), ensuring compatibility across 2.0–5.5 V supplies while maintaining TTL-level input compatibility in the AHCT variant. The overvoltage-tolerant input structure allows safe operation when driven by 5.5 V signals even under 2.0 V VCC conditions.

Dynamic performance is characterized by matched tPLH/tPHL propagation delays (≤8.0 ns at 3.3 V/15 pF), fast enable/disable timing (ten ≤7.0 ns, tdis ≤9.5 ns at 5 V/50 pF), and low power dissipation capacitance (CPD = 9 pF), making it suitable for high-frequency data bus conditioning without skew-induced timing violations.

Key Specifications

Pinout & Package

TSSOP5 (SOT353-1) package: plastic thin shrink small outline, 5-lead, 1.25 mm body width, 0.65 mm pitch, lead-free and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74AHCT1G126GW,125, the AHC variant offers superior noise margin in mixed-voltage designs; versus SN74LVC1G126DBVR, it provides guaranteed 2.0 V minimum VCC operation and pin-compatible replacement in existing TSSOP5 layouts.

Availability

74AHC1G126GW,125 is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics equipment, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74AHC1G126GW,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 optimized for efficiency, reliability, and miniaturization in high-volume applications.

The 74AHC series targets general-purpose logic interfacing with emphasis on low power, wide supply range, and robust ESD/latch-up performance - designed specifically for space-constrained industrial and automotive subsystems.

FAQ

What is the maximum input voltage the 74AHC1G126GW,125 can tolerate when VCC = 2.0 V?

The device supports overvoltage-tolerant inputs up to 5.5 V regardless of VCC level. When VCC = 2.0 V, inputs may safely accept signals from 0 V to 5.5 V without damage or functional degradation, enabling seamless level translation between disparate voltage domains without external protection components.

Does the 74AHC1G126GW,125 support hot-swap or live-insertion applications?

Yes - its 3-state output architecture and overvoltage-tolerant inputs allow safe insertion into powered backplanes. With OE held HIGH during insertion, the output remains in high-impedance state, preventing bus contention; input tolerance to 5.5 V avoids damage from supply sequencing mismatches during hot-plug events.

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

At VCC = 5.0 V, tpd is 3.4 ns (typ) for CL = 15 pF and 4.7 ns (typ) for CL = 50 pF. At VCC = 3.3 V, tpd increases to 4.4 ns (typ) and 6.3 ns (typ) respectively. This voltage- and capacitance-dependent behavior is fully characterized in Table 8 of the datasheet and must be accounted for in timing-critical signal paths.

Is the 74AHC1G126GW,125 pin-compatible with other 5-pin logic buffers in TSSOP5 packages?

It shares the SOT353-1 (TSSOP5) footprint with industry-standard 5-pin logic devices, but pin assignments are specific: OE (1), A (2), GND (3), Y (4), VCC (5). Substituting with non-Nexperia buffers requires verification of identical pinout - e.g., SN74LVC1G126 uses reversed VCC/OE placement and is not mechanically or electrically interchangeable.