Diodes Incorporated AH9246-P-B

Overview

AH9246-P-B from Diodes Incorporated is an ultra-high-sensitivity, micropower omnipolar Hall-effect switch in TO92S package with integrated pull-up resistor, chopper stabilization, and sleep-awake logic. It operates from 2.5V to 5.5V, draws only 4µA in sleep mode and 8µA average at 3V, and switches on with either north or south magnetic pole - ideal for cover-detection in notebook PCs and low-duty-cycle handheld wireless awake switches.

For engineers reviewing the AH9246-P-B datasheet, AH9246-P-B pinout, AH9246-P-B application, or AH9246-P-B equivalent, key selection criteria include magnetic operating point (BOPS = 9–27 G), hysteresis (6 G min), sleep-mode current (4 µA typ), output latch behavior during sleep, and TO92S package compatibility with legacy mechanical switch footprints.

Technical Context

The AH9246 employs a chopper-stabilized Hall plate and comparator architecture to suppress offset drift across temperature and supply voltage, ensuring stable BOP/BRP over −40°C to +85°C. Its digital output toggles only when perpendicular magnetic flux exceeds BOPS (south) or BOPN (north), then latches during 100 ms sleep intervals.

Sleep-awake timing is fixed: 150 µs awake duration enables fast magnetic response, while 100 ms sleep period achieves ultra-low average current. Output remains latched in sleep mode, eliminating false triggers during quiescent periods - critical for battery-powered cover-switch applications.

Key Specifications

Pinout & Package

Package: TO92S - industry-standard 3-pin through-hole plastic package (14.0–15.5 mm length, 3.85–4.15 mm body width), compatible with automated insertion and wave soldering.

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 DRV5013AJQDBVR, the AH9246-P-B uniquely combines TO92S through-hole compatibility, internal pull-up, and <10 µA average current - making it the only drop-in solution for legacy battery-powered cover-switch designs requiring minimal layout change and maximum runtime.

Availability

AH9246-P-B is available at Aetrix Electronics and suitable for notebook cover detection, handheld wireless awake switching, and low-duty-cycle industrial panel monitoring requiring stable component supply, long-lifecycle availability, and RoHS-compliant through-hole packaging.

Supply support for AH9246-P-B 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 consumer, industrial, and computing markets.

The AH9246 belongs to Diodes' Hall-effect sensor product line, engineered specifically for ultra-low-power magnetic switching in portable and battery-critical applications - emphasizing micropower operation, thermal stability, and mechanical interoperability with legacy switch footprints.

FAQ

What is the magnetic polarity requirement for AH9246-P-B activation?

The AH9246-P-B is omnipolar: it activates with either north or south magnetic pole oriented toward the part marking surface. For south pole, activation occurs when perpendicular flux exceeds BOPS (9–27 G); for north pole, when flux is more negative than BOPN (−27 to −9 G). No magnet orientation alignment is needed during assembly.

Does AH9246-P-B require an external pull-up resistor?

No. The AH9246-P-B integrates a 100 kΩ pull-up resistor on the OUTPUT pin, enabling direct connection to a microcontroller GPIO without external components. This reduces bill-of-materials count and PCB area - especially valuable in compact handheld designs where space is constrained.

How does the sleep-awake cycle affect real-world response time?

The AH9246-P-B wakes every 100 ms for 150 µs to sample magnetic field. If a magnetic transition occurs during sleep, it is captured within ≤100 ms. For fast events like lid flips, this latency is imperceptible; for static detection (e.g., door closed), it ensures no power penalty while maintaining functional correctness.

Is AH9246-P-B suitable for automotive applications?

No. While rated for −40°C to +85°C, the AH9246-P-B is not AEC-Q200 qualified and lacks automotive-specific validation (e.g., extended temperature testing, board-level ESD per ISO 10605). It is designed for computing and industrial portable equipment - not under-hood or safety-critical vehicle systems.