Nexperia USA Inc. 74AHCT1G126GW,165

Overview

74AHCT1G126GW,165 from Nexperia is a single 3-state bus buffer/line driver with TTL-compatible input thresholds, 2.0–5.5 V supply range, overvoltage-tolerant inputs (up to 5.5 V), and operation from –40 °C to +125 °C. It enables bidirectional voltage translation in mixed-supply systems and drives capacitive loads up to 50 pF with typical propagation delay of 3.4 ns at 5 V.

For engineers reviewing the 74AHCT1G126GW,165 datasheet, 74AHCT1G126GW,165 pinout, 74AHCT1G126GW,165 application, or 74AHCT1G126GW,165 equivalent, this device serves as a compact, high-noise-immunity level-shifting buffer for industrial I/O expansion, sensor interface multiplexing, and microcontroller peripheral bus control where low quiescent current (<2 μA) and guaranteed 8 mA drive strength are required.

Technical Context

This device implements a non-inverting 3-state buffer with active-low output enable (OE). Its TTL-level input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V) ensure compatibility with legacy 5 V logic while operating on modern 3.3 V supplies. The output stage delivers symmetrical drive capability and balanced propagation delays (tpd = tPLH = tPHL).

Input overvoltage tolerance (up to 5.5 V independent of VCC) allows safe interfacing between higher-voltage signal sources and lower-voltage logic domains without external clamping. The device supports hot-swap and partial-power-down operation due to its high-impedance OFF-state leakage (±0.25 μA max) and latch-up immunity exceeding 100 mA per JESD78 Class II Level A.

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,165, the 74AHCT1G125GW,165 offers identical performance with inverted logic, while SN74LVC1G126DBVR trades TTL compatibility for broader low-voltage support - making the AHCT variant optimal for robust 5 V interoperability in mixed-signal industrial and automotive subsystems.

Availability

74AHCT1G126GW,165 is available at Aetrix Electronics and suitable for industrial sensor hubs, automotive body control modules, microcontroller I/O expansion, and legacy system interface adapters requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74AHCT1G126GW,165 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, analog, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in industrial, automotive, and consumer applications.

The 74AHCT1G126GW,165 belongs to Nexperia's advanced logic family designed specifically for robust voltage translation and bus isolation in harsh-environment embedded systems - emphasizing wide temperature operation, overvoltage resilience, and low static/dynamic power.

FAQ

What is the maximum input voltage the 74AHCT1G126GW,165 can tolerate when VCC = 3.3 V?

The device supports overvoltage-tolerant inputs up to 5.5 V regardless of VCC level. When powered from 3.3 V, it safely accepts 5 V logic signals on pin A without damage or functional degradation - a key enabler for mixed-voltage system integration without external protection components.

Does the 74AHCT1G126GW,165 support hot-swap insertion into a live 5 V bus?

Yes - its high-impedance OFF-state (IOZ ≤ ±0.25 μA at VCC = 5.5 V), latch-up immunity (>100 mA), and overvoltage-tolerant inputs allow safe insertion into a powered bus. However, OE must be held HIGH during insertion to prevent output contention until system initialization completes.

How does the 74AHCT1G126GW,165 differ from the 74AHC1G126GW,165 variant?

The AHCT version features TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V), ensuring reliable recognition of 5 V logic signals. The AHC variant uses CMOS thresholds (VIH ≥ 3.85 V at VCC = 5.5 V), which may fail to register marginal 5 V inputs - making AHCT preferred for legacy 5 V interoperability.

Can the 74AHCT1G126GW,165 drive a 50 pF load at 50 MHz toggle rate?

At CL = 50 pF and VCC = 5.0 V, propagation delay is 4.7 ns (typ), disable time is 6.1 ns (typ), and CPD = 11 pF. With 50 MHz (20 ns period), setup/hold margins remain sufficient - but total dynamic power (PD ≈ CPD × VCC² × f) must be verified against 250 mW package limit at ambient temperature.