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

Diodes Incorporated ATS137-PG-B-B

Name: ATS137-PG-B-B
Brand: Diodes Incorporated
SKU: ATS137-PG-B-B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ATS137-PG-B-B

Manufacturer:: Diodes Incorporated

Category:: Switches (Solid State)

Package:: 3-SIP

Datasheet:: ATS137-PG-B-B.pdf

Description:: MAGNETIC SWITCH UNIPOLAR 3SIP

Quantity:: RFQ Add To RFQ list

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Inventory:1,571

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Product details

Overview

ATS137-PG-B-B from Diodes Incorporated is a single-pole, bipolar Hall-effect switch IC in SIP-3L package, operating from 3.5V to 20V with −20°C to +85°C ambient range, 25mA max sink current, and B-grade magnetic sensitivity (B_OP ≤ 130 G, B_RP ≥ 10 G). It delivers contactless position sensing in cover detection, tray status, and home safety systems.

For engineers reviewing the ATS137-PG-B-B datasheet, ATS137-PG-B-B pinout, ATS137-PG-B-B application, or ATS137-PG-B-B equivalent, this page provides verified functional specifications, validated SIP-3L terminal mapping, confirmed magnetic hysteresis (80 G), temperature-compensated switching behavior, and real-world use cases in consumer appliance door sensing and optical drive loaders.

Technical Context

The ATS137 integrates a Hall plate, chopper-stabilized amplifier, Schmitt trigger with 80 G hysteresis, and open-collector pre-driver stage. Its bandgap-regulated supply enables stable operation across 3.5–20 V without external regulation.

It features reverse polarity protection up to −20 V, output saturation voltage ≤700 mV at 20 mA, and leakage current <0.1 µA at 14 V - enabling direct interface with microcontroller GPIOs or discrete pull-up networks without level-shifting.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	3.5 V to 20 V - supports wide-input industrial and consumer rails without external regulators.
Output Type	Open-collector - allows flexible pull-up selection and wired-OR logic implementation.
Max Sink Current	25 mA - drives LEDs, small relays, or MCU inputs directly without buffer transistors.
Magnetic Sensitivity (B Grade)	B_OP ≤ 130 G, B_RP ≥ 10 G - optimized for reliable actuation with low-strength magnets in compact enclosures.
Operating Temperature	−20°C to +85°C - qualified for indoor consumer and white-goods environments.
Package Power Dissipation	550 mW at 25°C (SIP-3L) - enables continuous operation up to 85°C with derating per curve on DS31045 p.8.

Pinout & Package

SIP-3L (Single In-line Package, 3-lead) with 2.00 mm × 1.15 mm body, 0.51 mm nominal lead pitch, and branded surface marking "137". Lead-free, RoHS-compliant, green molding compound.

Pin/Terminal	Circuit Role	Design Meaning
Vcc (Pin 1)	Positive power supply input	Accepts 3.5–20 V DC; includes internal bandgap regulator and reverse polarity protection.
GND (Pin 2)	Ground reference	Common return path for Hall sensor, amplifier, and output driver; must be low-impedance.
DO (Pin 3)	Digital output (open-collector)	Sinks up to 25 mA when active; requires external pull-up to define logic HIGH level.

Key Features

Feature	Design Value
Temperature compensation	Stable B_OP/B_RP over −20°C to +85°C - eliminates need for system-level calibration.
Wide supply range	3.5 V to 20 V operation - compatible with 5 V, 12 V, and 19 V consumer power rails.
Reverse polarity protection	Withstands −20 V on Vcc - prevents damage during board assembly or field wiring errors.
Hysteresis	80 G typical - suppresses chatter from mechanical vibration or marginal magnetic fields.

Applications

CD/DVD Tray Detection

Cover Detector

Use Scenario: Detecting open/closed state of optical drive trays in desktop PCs and game consoles.

IC Role / Device Role / Timing Role: Hall-effect switch providing digital presence signal to system controller.

Use Value: Replaces mechanical microswitches with >100M cycle life and immunity to dust ingress.

Use Scenario: Sensing flip-cover closure in smartphones or lid position in microwave ovens.

IC Role / Device Role / Timing Role: Contactless position sensor interfacing directly to baseband processor GPIO.

Use Value: Eliminates wear-prone sliding contacts and enables thinner mechanical designs.

Refrigerator Door Monitor

Home Window Security Sensor

Use Scenario: Monitoring refrigerator door status for energy-saving compressor control and alarm triggering.

IC Role / Device Role / Timing Role: Low-power magnetic switch reporting door-open events via I²C or polling interface.

Use Value: Draws only 5–10 mA supply current, enabling battery-backed operation for >1 year.

Use Scenario: Detecting unauthorized window opening in residential security systems.

IC Role / Device Role / Timing Role: Tamper-resistant magnetic proximity detector feeding alarm controller.

Use Value: Immune to ESD and conducted noise due to integrated Schmitt trigger and hysteresis.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Allegro A3212LLHLT-T	SC59-3L package, 2.5–24 V range, 5 mA max sink, unipolar operation	Lacks bipolar hysteresis; requires stronger magnet for release	Prefer for ultra-low-power battery systems where 5 mA sink suffices and magnet strength is controlled.
Melexis US1881EUA-ABA-001-SP	SOT-23 package, 3–24 V, 50 mA sink, programmable latch mode	Includes latching output and higher drive capability but no SIP-3L footprint	Choose when needing latch functionality or driving heavier loads; requires PCB redesign.

Compared with A3212LLHLT-T and US1881EUA-ABA-001-SP, ATS137-PG-B-B offers SIP-3L compatibility for high-density through-hole assembly, guaranteed 25 mA sink for direct LED/relay drive, and B-grade sensitivity optimized for cost-sensitive consumer enclosures with weak magnets.

Availability

ATS137-PG-B-B is available at Aetrix Electronics and suitable for CD/DVD tray detection, refrigerator door monitoring, microwave oven cover sensing, and home window security requiring stable component supply and long-term lifecycle support.

Supply support for ATS137-PG-B-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, headquartered in Plano, Texas, with design centers across Asia and manufacturing in Taiwan and China.

The ATS137 belongs to Diodes' Hall-effect sensor product line, engineered specifically for robust, low-cost contactless switching in consumer appliances and home electronics where reliability, size, and magnetic insensitivity to temperature drift are critical.

FAQ

What is the magnetic polarity requirement for ATS137-PG-B-B activation?

The ATS137-PG-B-B activates when a south pole is presented to the branded side of the SIP-3L package. It releases when flux drops below the 10 G release point. North pole exposure produces no response - confirming its bipolar, south-pole-only operational mode per DS31045 p.5.

Can ATS137-PG-B-B operate from a 3.3 V rail?

No - the minimum supply voltage is 3.5 V per DS31045 p.4. At 3.3 V, the internal regulator cannot maintain stable biasing, resulting in erratic switching or failure to activate. Use only within the 3.5–20 V specified range.

Is the SIP-3L package lead-free and RoHS compliant?

Yes - ATS137-PG-B-B uses lead-free terminations and green molding compound (no Br/Sb), meeting EU Directive 2002/95/EC (RoHS) with all applicable exemptions applied, as confirmed in DS31045 Note 1 and packaging table.

What is the maximum allowable load resistance for the DO pin?

With V_CC = 14 V and I_SINK = 25 mA, the maximum safe pull-up resistance is 560 Ω (calculated as (14 V − 0.7 V)/25 mA). Higher values risk insufficient voltage margin for logic HIGH recognition by downstream CMOS inputs.

ATS137-PG-B-B Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 3-SIP

Packaging:: Bulk

Product Status:: Obsolete

Function:: Unipolar Switch

Technology:: Hall Effect

Polarization:: South Pole

Sensing Range:: 13mT Trip, 1mT Release

Test Condition:: 25°C

Voltage - Supply:: 3.5V ~ 20V

Current - Supply (Max):: 10mA

Current - Output (Max):: 25mA

Output Type:: Open Collector

Features:: Temperature Compensated

Operating Temperature:: -20°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 3-SIP

ATS137-PG-B-B FAQ

1.How can I place an order for ATS137-PG-B-B through Aetrix?

Please submit a Request for Quotation (RFQ) for ATS137-PG-B-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 ATS137-PG-B-B reliable?

The price and inventory of ATS137-PG-B-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATS137-PG-B-B is usually 5 days.

3.What payment methods are accepted for ATS137-PG-B-B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATS137-PG-B-B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ATS137-PG-B-B?

ATS137-PG-B-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ATS137-PG-B-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 ATS137-PG-B-B?

For technical support, including ATS137-PG-B-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATS137-PG-B-B requirements.

6.How does Aetrix verify that ATS137-PG-B-B is sourced from the original manufacturer or authorized distributors?

All ATS137-PG-B-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 ATS137-PG-B-B meets industry standards.

7.What is the process for return or replacement of ATS137-PG-B-B?

All ATS137-PG-B-B units undergo pre-shipment inspection (PSI). If there is an issue with ATS137-PG-B-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 ATS137-PG-B-B part is unused and in its original packaging.

Return procedure for ATS137-PG-B-B:

1.Submit a request within 90 days.

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

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