Image shown is for reference only. Actual package may vary. Refer to the product data sheet for package details. SC59

TO92S (Type B)

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AH9251

Micropower Omnipolar Hall Effect Switch

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Description

The AH9251 is a medium sensitivity micropower Omnipolar hall-effect switch ICs, specifically designed for portable and battery powered consumer equipment, to home appliances and industrial applications.

Based on High/Medium sensitivity hall effect plates and chopper stabilized architecture, the AH9251 provides a reliable solution over the whole operating range.

The high and Medium sensitivity hall effect switches have been optimized to operate over the supply range of 2.5V to 5.5V and use a micropower sleep function to give an average supply current of only 8uA.

AH9251 has push pull output for flexibility.They are small low profile industry standard SC59 and TO92S packages.

Feature(s)

Omnipolar Operation (Switching with North or South Poles)
Micropower Operation
Built in Pull-up Resistor on the Output
2.5V to 5.5V Power Supply
Stabilized Chopper
Superior Temperature Stability
Digital Output Signal
-40°C to +85°C Operating Temperature
ESD (HBM): 5000V
Small Low Profile Industry Standard SC59 and TO92S Packages
Totally Lead-Free & Fully RoHS Compliant
Halogen and Antimony Free. “Green” Device

Application(s)

Handheld Wireless Application Awake Switch
Doors, Lids, Covers and Tray Position Detect Switches
Liquid Level Detection
Battery Powered Consumer, Home Appliances and Industrial Applications

Specifications & Technical Documents

Product Parameters

Compliance (Only Automotive Supports PPAP)	Standard
Operating Ambient Temperature (°C)	-40 to 85
AEC Qualified	No
Type	Omnipolar
Outputs	Single
Output Type	Pull-Up Resistor
Active Output State (B > Bop)	Low
Inactive Output State (B < Brp)	High
Operating Voltage (V)	2.5 to 5.5
Average Supply Current (mA)	0.008
Min Operating Point Bop (Bops +ve/ Bopn -ve) (Gauss)	40
Typ Operating Point Bop (Bops +ve/ Bopn -ve) (Gauss)	60
Max Operating Point Bop (Bops +ve/ Bopn -ve) (Gauss)	80
Min Release Point Brp (Brps +ve/ Brpn -ve) (Gauss)	30
Typ Release Point Brp (Brps +ve/ Brpn -ve) (Gauss)	50
Max Release Point Brp (Brps +ve/ Brpn -ve) (Gauss)	70

Technical Documents

Recommended Soldering Techniques

TN1.pdf

Purchase & Availability

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Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN #	Issue Date	Implementation Date	Subject
PCN-2770	2025-10-30	2025-10-30	Add Fab Site Code, Country of Diffusion (COD) and Assembly Site Origin (ASO) on Product and Shipping Labels for all Diodes Products
PCN-2695	2024-10-11	2025-01-10	Additional Wafer Source (JKFAB), AT Site (JCET), BOM and POD
PCN-2512	2021-04-16	2021-07-16	Qualified Additional Assembly & Test (A/T) Site