Diodes Incorporated 74AHC1G09W5-7

Overview

74AHC1G09W5-7 from Diodes Incorporated is a single 2-input positive AND gate with open-drain output, designed for level-shifted wired-AND/wired-OR logic in mixed-voltage systems. It operates from 2.0V to 5.5V, sinks up to 8mA at 5.0V, features Schmitt-trigger inputs for noise immunity, and supports −40°C to +125°C operation in SOT25 package.

For engineers reviewing the 74AHC1G09W5-7 datasheet, 74AHC1G09W5-7 pinout, 74AHC1G09W5-7 application, or 74AHC1G09W5-7 equivalent, key selection criteria include open-drain drive capability, input hysteresis, supply voltage flexibility, and thermal performance in space-constrained PCB layouts.

Technical Context

This device implements the Boolean function Y = A · B with active-low open-drain output requiring external pull-up. Its Schmitt-trigger inputs tolerate slow-rising/falling signals (≤100 ns/V at 3.3V), enabling robust interfacing with noisy or RC-filtered sources.

The logic gate complies with JESD22 ESD standards (2kV HBM, 1kV CDM) and JESD78 latch-up Class II (>100mA), and is rated for junction temperatures up to +150°C - making it suitable for industrial-grade signal conditioning and bus arbitration circuits.

Key Specifications

Pinout & Package

74AHC1G09W5-7 is housed in a 5-pin SOT25 (SC-74A) surface-mount package with 0.95mm body height and 0.65mm lead pitch. The package is lead-free, halogen- and antimony-free per Diodes' "Green" definition.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 2-input open-drain AND gate applications.

Compared with SN74LVC1G09DBVR and 74AUP1G09GW,125, the 74AHC1G09W5-7 uniquely balances wide supply range, Schmitt-trigger noise rejection, and industrial temperature support - making it optimal for ruggedized mixed-voltage control logic where reliability trumps ultra-low power or extreme drive strength.

Availability

74AHC1G09W5-7 is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB enumeration logic, I²C bus arbitration, and legacy parallel port handshaking requiring stable component supply and long-term manufacturability.

Supply support for 74AHC1G09W5-7 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, industry-qualified components for automotive, industrial, and computing markets.

The 74AHC logic family targets high-speed, low-power general-purpose digital functions with enhanced ESD robustness and wide supply tolerance - specifically engineered for signal integrity in mixed-voltage embedded control systems.

FAQ

What is the minimum pull-up resistor value required for reliable operation?

The minimum pull-up resistor depends on VCC and sink current. At VCC = 5.0V and IOL = 8mA, RPU ≤ 625Ω ensures VOL ≤ 0.44V. For typical 4.7kΩ pull-ups, the output rises within 12.5ns (CL = 50pF). Lower values improve rise time but increase static power draw and may exceed driver limits.

Can unused inputs be left floating?

No - unused inputs must be tied to VCC or GND. Floating inputs cause increased ICC, unpredictable logic states, and potential oscillation due to CMOS input structure. The datasheet explicitly requires termination to avoid undefined behavior and excessive power consumption across temperature.

Does this device support hot-swap or live-insertion?

No - the 74AHC1G09W5-7 lacks hot-swap protection circuitry. Applying VCC after signal inputs may forward-bias input clamps, causing latch-up or excessive current. Power sequencing must ensure VCC is stable before applying input signals, especially in backplane or modular systems.

Is the SOT25 package compatible with reflow profiles for lead-free soldering?

Yes - the SOT25 package is fully RoHS-compliant and qualified for standard lead-free reflow profiles (J-STD-020D, peak 260°C). Diodes' "Green" molding compound withstands three reflow cycles without delamination or warpage, provided recommended pad layout (AP02001) and thermal relief are followed.