Diodes Incorporated 74AHC1G125W5-7

Overview

74AHC1G125W5-7 from Diodes Incorporated is a single non-inverting 3-state buffer IC designed for bus driving and signal isolation in low-voltage logic systems. It operates across 2.0V–5.5V supply, delivers ±8 mA output drive at 5.0V, features Schmitt-trigger inputs for noise immunity, and uses SOT25 (5-pin) package with verified pinout: OE (1), A (2), GND (3), Y (4), Vcc (5).

For engineers reviewing the 74AHC1G125W5-7 datasheet, 74AHC1G125W5-7 pinout, 74AHC1G125W5-7 application, or 74AHC1G125W5-7 equivalent, this device serves as a compact, low-power, voltage-tolerant logic buffer for interface isolation, bus contention control, and level-shifting in space-constrained embedded designs.

Technical Context

This CMOS buffer implements a single-channel non-inverting data path with active-low 3-state enable (OE). Its Schmitt-trigger input ensures robust operation with slow-rising/falling signals, while rail-to-rail output swing supports interoperability across mixed-supply domains (2.0V–5.5V).

Propagation delay is 3.4 ns typical (CL = 15 pF, VCC = 5 V), with enable/disable times under 7 ns. Input leakage remains ≤±1 μA, and high-impedance output leakage is ≤2.5 μA at 5.5 V - enabling reliable bus sharing without signal contention.

Key Specifications

Pinout & Package

SOT25 (5-pin SC-74A) surface-mount package: ultra-compact footprint (2.8 mm × 1.6 mm × 1.1 mm), lead-free, RoHS-compliant, green molding compound.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC1G125DBVR and 74AUP1G125GW,125, the 74AHC1G125W5-7 uniquely balances 2.0–5.5V interoperability, Schmitt noise immunity, and industrial temperature range - making it optimal for mixed-voltage industrial and computing interfaces where signal integrity and supply flexibility are co-priorities.

Availability

74AHC1G125W5-7 is available at Aetrix Electronics and suitable for USB peripheral isolation, industrial sensor conditioning, embedded display bus control, and low-power IoT node I/O expansion requiring stable component supply across automotive-grade temperature ranges and long production lifecycles.

Supply support for 74AHC1G125W5-7 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, low-power, and small-signal solutions for industrial, computing, and consumer markets.

The 74AHC logic family targets robust, voltage-flexible interface bridging in space-constrained applications - emphasizing rail-to-rail performance, ESD resilience, and compatibility across legacy and modern logic standards.

FAQ

What is the maximum clock frequency supported by the 74AHC1G125W5-7?

The 74AHC1G125W5-7 is not a clocked device and has no internal clock. Its usable toggle frequency depends on load capacitance and supply voltage: with 15 pF load and 5V supply, propagation delay is 3.4 ns typical, supporting clean signal edges up to ~100 MHz in point-to-point configurations. System-level timing must account for PCB trace delays and fanout.

Can the 74AHC1G125W5-7 be used for level translation between 3.3V and 5V logic?

Yes - its 2.0V–5.5V supply range and rail-to-rail input thresholds allow direct use as a unidirectional level shifter: connect VCC to the destination domain (e.g., 5V), drive A from a 3.3V source (within VIH/VIL specs), and read Y in the 5V domain. No external resistors or direction control needed.

Is the SOT25 package of the 74AHC1G125W5-7 compatible with automated optical inspection (AOI)?

Yes - the SOT25 package has coplanar leads, defined solder pad geometry per AP02001, and matte tin finish, meeting IPC-A-610 Class 2/3 requirements for AOI. Its 0.95 mm lead pitch and 0.4 mm lead length support reliable solder joint inspection using standard red-green-blue lighting and contrast algorithms.

Does the 74AHC1G125W5-7 require external pull-up or pull-down resistors on unused pins?

Per datasheet Note 3, unused inputs (A or OE) must be tied to VCC or GND - floating inputs cause increased ICC and potential oscillation. OE should be pulled LOW for always-enabled operation or HIGH for always-disabled; A must never float. No pull resistors needed on Y or power pins.