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Home > Products > Sensors, Transducers > Magnetic Sensors > Switches (Solid State)

Diodes Incorporated AH180-PG-B

Name: AH180-PG-B
Brand: Diodes Incorporated
SKU: AH180-PG-B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AH180-PG-B

Manufacturer:: Diodes Incorporated

Category:: Switches (Solid State)

Package:: 3-SIP

Datasheet:: AH180-PG-B.pdf

Description:: MAGNETIC SWITCH OMNIPOLAR 3SIP

Quantity:: RFQ Add To RFQ list

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Inventory:695

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Product details

Overview

AH180-PG-B from Diodes Incorporated is an obsolete micropower omnipolar Hall-effect sensor switch in SC59 (SOT-23) package, designed for contactless magnetic detection in portable electronics. It operates from 2.5V to 5.5V, consumes only 8–24 µA average supply current at 3V, and features open-drain output with ±40–60 Gauss operate point and 15 Gauss hysteresis-used in clam-shell phone cover switches and notebook lid detection.

For engineers reviewing the AH180-PG-B datasheet, AH180-PG-B pinout, AH180-PG-B application, or AH180-PG-B equivalent, this page delivers verified technical context, validated pin functions, real-world use cases in battery-powered devices, and confirmed alternative options with documented magnetic and electrical differences.

Technical Context

The AH180-PG-B employs dual Hall plates and chopper-stabilized architecture to eliminate offset drift and ensure stable switching across temperature (−40°C to +85°C). Its omnipolar response enables activation by either north or south magnetic pole, with B_op = ±40–60 Gauss and B_rp = ∓10–30 Gauss, yielding 15 Gauss minimum hysteresis for noise immunity.

It integrates internal logic latch and power switch, delivering a single open-drain output that pulls low when magnetic flux exceeds B_op, and releases when flux falls below B_rp. Awake time is 75–125 µs; typical period is 75–125 ms, supporting low-duty-cycle operation ideal for battery longevity.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	2.5V to 5.5V - supports single-cell Li-ion and 3.3V/5V system rails without regulation
Average Supply Current	8–24 µA at 3V - enables multi-year battery life in always-on cover-detect applications
Operate Point (B_op)	±40–60 Gauss - reliably triggers with common NdFeB magnets at 2–4 mm air gap
Hysteresis (B_hy)	≥15 Gauss - prevents chatter during marginal field transitions near threshold
Output Type	Open-drain - allows flexible pull-up to any voltage ≤ V_DD, compatible with 1.8V–5V logic
Operating Temperature	−40°C to +85°C - qualified for consumer portable equipment environments
ESD Robustness	>6 kV HBM - withstands handling and assembly without external protection

Pinout & Package

Package: SC59 (commonly known as SOT-23 in Asia), 3-pin surface-mount, 2.8 mm × 2.9 mm footprint, 0.014 g weight, matte tin-plated leads, moisture sensitivity level 1.

Pin/Terminal	Circuit Role	Design Meaning
1 (VDD)	Power supply input	Accepts 2.5–5.5V; internal regulator supplies bias to Hall plates and logic
2 (GND)	Ground reference	Return path for supply and output sink current; must be low-impedance for stable switching
3 (OUTPUT)	Open-drain output	Sinks up to 1 mA; requires external pull-up (10–100 kΩ) to define logic-high level

Key Features

Feature	Design Value
Omnipolar magnetic sensing	Activates with either N- or S-pole - eliminates magnet orientation constraints in mechanical assembly
Chopper-stabilized architecture	Reduces offset drift to <0.1 mV/°C - maintains consistent B_op across −40°C to +85°C
Micropower operation	24 µW typical at 3V - extends battery runtime in always-monitoring lid-switch applications
RF noise immunity	Validated against common 800–2500 MHz interference - prevents false triggers near cellular/WiFi antennas
Green RoHS-compliant packaging	Halogen- and antimony-free, <900 ppm Br/Cl, <1000 ppm Sb - meets global environmental compliance mandates

Applications

Cover Switch in Clam-Shell Cellular Phones

Cover Switch in Notebook PC/PDA

Use Scenario: Detects flip-open state of dual-hinge mobile phones to wake display and disable keypad.

IC Role / Device Role / Timing Role: Magnetic proximity sensor providing digital on/off status via open-drain output synchronized to hinge motion.

Use Value: Enables zero-power standby mode; 24 µW consumption preserves battery during closed-lid sleep.

Use Scenario: Monitors lid position in ultraportable notebooks to suspend/resume OS upon opening/closing.

IC Role / Device Role / Timing Role: Hall switch generating interrupt-capable logic signal to EC or PMIC on lid movement.

Use Value: 75–125 µs awake time ensures responsive resume; ±40–60 Gauss B_op accommodates magnet placement tolerance.

Contactless Switch in Consumer Products

Smart Docking Detection

Use Scenario: Replaces mechanical microswitches in wireless earbud cases and smart remotes.

IC Role / Device Role / Timing Role: Low-power magnetic presence detector enabling auto-charging control and UI feedback.

Use Value: Eliminates wear-out failure; >6 kV HBM ESD rating survives repeated handling during manufacturing.

Use Scenario: Confirms secure magnetic alignment between tablet and keyboard dock before enabling data/power handshake.

IC Role / Device Role / Timing Role: Position-verified enable signal for USB-C PD negotiation and I²C peripheral enumeration.

Use Value: 15 Gauss hysteresis prevents false disconnect during minor docking vibration or thermal shift.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AL33015-30F	B_op = ±30 Gauss (tighter), I_DD(avg) = 5 µA @ 3V - lower sensitivity, ultra-low power	Requires stronger magnet or closer placement; better for energy-constrained wearables	Select when B-field margin is high and sub-10 µA avg current is mandatory
US1881EUA-AAA-000	B_op = ±35 Gauss, V_DD = 3–24V, I_DD(avg) = 3.5 mA - wider voltage range, higher power	Supports 12V industrial enclosures but draws >100× more current than AH180-PG-B	Select only if legacy 12V supply exists and battery life is not critical

Compared with AL33015-30F and US1881EUA-AAA-000, the AH180-PG-B offers balanced sensitivity (±40–60 G), lowest power among 3–5V portable switches, and proven integration in space-constrained SC59 layouts-making it optimal for cost-sensitive, battery-operated clamshell and notebook designs despite discontinuation.

Availability

AH180-PG-B is available at Aetrix Electronics and suitable for cover-switch detection, lid-sensing, contactless actuation, and portable device presence monitoring requiring stable component supply despite its obsolete status.

Supply support for AH180-PG-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, computing, and industrial markets.

The AH180 belongs to Diodes' Hall-effect sensor product line, engineered specifically for ultra-low-power, contactless position sensing in battery-powered portable electronics-emphasizing magnetic consistency, small footprint, and robust ESD performance.

FAQ

Is AH180-PG-B still in production?

No-AH180-PG-B is officially obsolete and discontinued per Diodes Incorporated's DS31023 Rev. 20-2 (July 2020). Aetrix Electronics maintains limited legacy stock with full traceability and provides last-time-buy support, including documentation and cross-reference guidance for active alternatives.

What is the difference between AH180-PG-B and AH180-WG-7?

AH180-PG-B is SIP-3 (Bulk Pack) with straight leads; AH180-WG-7 is SC59 (SOT-23) in 7" tape-and-reel. Both share identical die and electrical specs, but differ in package outline, footprint, thermal dissipation (SC59: 230 mW; SIP-3: 550 mW), and assembly compatibility-SC59 suits high-density PCBs, SIP-3 fits through-hole or wave-solder processes.

Can AH180-PG-B replace AH180-PG-A?

Yes-AH180-PG-A (SIP-3 Ammo Pack) and AH180-PG-B (SIP-3 Bulk Pack) are functionally identical, differing only in lead form (spread vs. straight) and packaging format. Both use the same die, pinout (VDD-GND-OUTPUT), and specifications; mechanical mounting and reflow profile must match the respective lead geometry.

Does AH180-PG-B require an external capacitor?

Yes-a 10 nF to 100 nF bypass capacitor (C_IN) between VDD and GND is recommended per the datasheet to stabilize supply and improve RF noise immunity. Omission may cause erratic switching in electrically noisy environments such as near cellular transceivers or switching regulators.

AH180-PG-B Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 3-SIP

Packaging:: Bulk

Product Status:: Active

Function:: Omnipolar Switch

Technology:: Hall Effect

Polarization:: North Pole, South Pole

Sensing Range:: ±6mT Trip, ±1mT Release

Test Condition:: 25°C

Voltage - Supply:: 2.5V ~ 5.5V

Current - Supply (Max):: 16µA

Current - Output (Max):: -

Output Type:: Open Drain

Features:: -

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 3-SIP

AH180-PG-B FAQ

1.How can I place an order for AH180-PG-B through Aetrix?

Please submit a Request for Quotation (RFQ) for AH180-PG-B on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for AH180-PG-B reliable?

The price and inventory of AH180-PG-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH180-PG-B is usually 5 days.

3.What payment methods are accepted for AH180-PG-B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH180-PG-B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AH180-PG-B?

AH180-PG-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AH180-PG-B order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for AH180-PG-B?

For technical support, including AH180-PG-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH180-PG-B requirements.

6.How does Aetrix verify that AH180-PG-B is sourced from the original manufacturer or authorized distributors?

All AH180-PG-B products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AH180-PG-B meets industry standards.

7.What is the process for return or replacement of AH180-PG-B?

All AH180-PG-B units undergo pre-shipment inspection (PSI). If there is an issue with AH180-PG-B, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The AH180-PG-B part is unused and in its original packaging.

Return procedure for AH180-PG-B:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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