Diodes Incorporated AH9246-W-7

Overview

AH9246-W-7 from Diodes Incorporated is an ultra-high-sensitivity, micropower omnipolar Hall-effect switch in SC59 package, featuring chopper stabilization, 8 µA average supply current at 3 V, ±27 G operating point range, and built-in output pull-up resistor. It operates from 2.5 V to 5.5 V and delivers digital on/off switching with either north or south magnetic pole activation-used in notebook cover detection and low-duty-cycle handheld awake switches.

For engineers reviewing the AH9246-W-7 datasheet, AH9246-W-7 pinout, AH9246-W-7 application, or AH9246-W-7 equivalent, key selection criteria include magnetic sensitivity (BOP ±27 G), sleep-mode current (4 µA), awake time (150 µs), hysteresis (6 G), and SC59 thermal performance (230 mW at 25°C).

Technical Context

The AH9246-W-7 implements a chopper-stabilized Hall sensor architecture to suppress offset drift across temperature and supply voltage, ensuring stable BOP/BRP over −40°C to +85°C. Its sleep-awake timing logic cycles between active sensing (150 µs awake) and latched-output standby (100 ms sleep), achieving 8 µA average current at 3 V.

Magnetic response is omnidirectional: output turns low when perpendicular flux exceeds ±27 G (BOP), and high when flux falls below ±22 G (BRP), delivering 6 G hysteresis for noise immunity. The integrated pull-up eliminates external components, and the SC59 package supports reflow-compatible surface-mount assembly.

Key Specifications

Pinout & Package

The AH9246-W-7 is housed in a 3-pin SC59 surface-mount package (0.95 mm height, 2.8 mm × 1.6 mm footprint), optimized for automated placement and thermal dissipation up to 230 mW at 25°C ambient.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar omnipolar Hall-effect switch applications.

Compared with AL3320EUA-7 and US1881EUA-7, the AH9246-W-7 uniquely balances ultra-low average current (8 µA), integrated pull-up, and tight ±27 G BOP tolerance-making it optimal for compact, long-life lid-switch and holster-detection designs where PCB space and battery longevity are critical.

Availability

AH9246-W-7 is available at Aetrix Electronics and suitable for notebook cover detection, handheld wireless awake switching, and industrial panel door monitoring requiring stable component supply, RoHS-compliant packaging, and consistent magnetic threshold performance across production lots.

Supply support for AH9246-W-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, energy-efficient components for industrial, computing, and consumer markets.

The AH9246 belongs to Diodes' Hall-effect switch product line, engineered specifically for ultra-low-power, magnetically actuated user-interface functions in portable and battery-critical systems.

FAQ

What is the maximum recommended air gap between the AH9246-W-7 and magnet?

The AH9246-W-7 achieves reliable switching at up to 3 mm air gap with a standard N35-grade 3 mm × 3 mm × 1 mm ferrite magnet oriented perpendicular to the marking surface. At 3 mm, BOP (±27 G) is met with margin; gaps exceeding 3.5 mm require stronger magnets or recalibration per application testing.

Does the AH9246-W-7 require an external bypass capacitor?

Yes-a 10 nF ceramic capacitor must be placed between VDD and GND within 2 mm of the SC59 pins to stabilize the chopper oscillator and prevent output oscillation. A 100 pF capacitor is optional for additional high-frequency noise suppression but not required for basic operation.

Can the AH9246-W-7 drive an LED directly?

No-the output is open-collector rated for 1 mA sink current and 0.4 V low-level voltage at 1 mA. Driving even a low-current LED (typically 2–5 mA) would exceed its specification and cause VOL degradation or thermal stress; a discrete transistor or buffer IC is required for LED loads.

Is the SC59 package of AH9246-W-7 compatible with lead-free reflow profiles?

Yes-the AH9246-W-7 SC59 package is fully RoHS-compliant and qualified for JEDEC J-STD-020D-standard lead-free reflow, with peak temperature up to 260°C for 30 seconds. Its thermal performance curve confirms safe operation up to 85°C ambient under continuous 230 mW dissipation at 25°C.