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Diodes Incorporated ATS137-PG-B-A
- Part No.:
- ATS137-PG-B-A
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-SIP
- Datasheet:
-
ATS137-PG-B-A.pdf
- Description:
- MAGNETIC SWITCH UNIPOLAR 3SIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,633
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Product details
Overview
ATS137-PG-B-A from Diodes Incorporated is a single-pole, unipolar 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 output current, and magnetic operate/release points of 130G/10G (B-grade). It serves as a contactless position sensor in cover detection and appliance safety interlocks.
For engineers reviewing the ATS137-PG-B-A datasheet, ATS137-PG-B-A pinout, ATS137-PG-B-A application, or ATS137-PG-B-A equivalent, key selection criteria include magnetic sensitivity grade (B), open-collector drive capability, reverse polarity protection, temperature-compensated switching hysteresis, and SIP-3L lead-free packaging compliance.
Technical Context
The ATS137 integrates a Hall voltage generator, chopper-stabilized amplifier, Schmitt trigger with 80G hysteresis, and open-collector NPN pre-driver-enabling noise-immune digital switching without external components. Its bandgap-regulated internal supply ensures stable operation across 3.5–20V input.
Designed for unipolar south-pole activation only, it delivers 300–700mV saturation voltage at 20mA sink load and <0.1µA leakage when off. Magnetic thresholds are specified at 25°C but vary with temperature and supply voltage per datasheet Note 7.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.5V to 20V DC - supports wide-input industrial and automotive battery systems without external regulation |
| Output Type | Open-collector NPN - requires external pull-up; enables wired-OR logic and interface with 3.3V/5V/12V logic families |
| Sink Current | 25mA maximum - directly drives LEDs, small relays, or microcontroller inputs without buffer transistors |
| Magnetic Sensitivity | B-grade: Bop ≤130G, Brp ≥10G - optimized for robust detection in high-interference home appliance environments |
| Operating Temp | −20°C to +85°C - validated for interior use in refrigerators, microwaves, and DVD loaders |
| Protection Features | Reverse polarity protection up to −20V - prevents damage during incorrect power connection in field service |
| Package | SIP-3L (3-pin single-inline) - surface-mount compatible with standard reflow profiles; 2.0mm × 1.15mm footprint |
Pinout & Package
SIP-3L package: 3-pin single-inline plastic package with gull-wing leads, branded top surface, and active Hall element located beneath pin 1 (Vcc) per datasheet Figure 10.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vcc | Positive power supply input | Supplies internal regulator and sensing circuitry; accepts 3.5–20V DC with reverse polarity tolerance |
| GND | Ground reference | Return path for supply current and output sink current; must be low-impedance for stable hysteresis |
| DO | Digital output (open-collector) | Sinks up to 25mA when activated by south-pole magnetic field ≥130G; floats high when inactive |
Key Features
| Feature | Design Value |
|---|---|
| Temperature compensation | Internal circuitry maintains consistent Bop/Brp over −20°C to +85°C, reducing calibration drift in appliances |
| Wide voltage operation | 3.5–20V supply range eliminates need for external LDO in 12V battery or 5V logic systems |
| Reverse polarity protection | Withstands −20V on Vcc - protects against accidental reverse connection during manufacturing or field repair |
| Lead-free & RoHS compliant | SIP-3L package uses green molding compound (no Br/Sb) and lead-free finish per EU Directive 2002/95/EC |
| High ESD immunity | Qualified to >4kV HBM - survives handling and assembly without additional protection circuitry |
Applications
| Refrigerator Door Sensor | DVD Tray Position Detector |
|---|---|
|
Use Scenario: Detects door open/closed state in household refrigerators to control interior lighting and compressor logic. IC Role / Device Role / Timing Role: Unipolar Hall switch providing clean digital signal to main controller MCU upon magnet proximity change. Use Value: Replaces electromechanical microswitches with 10× longer lifetime and no contact bounce, reducing warranty claims. |
Use Scenario: Monitors tray insertion/ejection in consumer DVD players to enable/disable laser and motor control. IC Role / Device Role / Timing Role: Contactless position detector interfacing directly with system ASIC via open-collector output. Use Value: Enables faster response (<1.5µs fall time) than reed switches, improving user experience during media loading. |
| Smart Microwave Oven Door Lock | Home Security Window Tamper Switch |
|
Use Scenario: Verifies door closure before enabling high-power magnetron operation in certified safety-critical microwave ovens. IC Role / Device Role / Timing Role: Safety interlock sensor with fail-safe open-collector output tied to hardware shutdown circuit. Use Value: Meets IEC 60335-1 requirements via intrinsic reliability-no moving parts to wear or misalign over 100,000 cycles. |
Use Scenario: Mounted on window frames to detect unauthorized opening in residential alarm systems. IC Role / Device Role / Timing Role: Low-power magnetic presence detector feeding alarm panel input with minimal quiescent current (5–10mA). Use Value: Operates reliably in dusty/humid environments where reed switches corrode or stick, reducing false alarms. |
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 | SC-59 package; 2.5–24V supply; 5mA max sink; ±10G hysteresis; bipolar latching operation | Requires bipolar magnet actuation; unsuitable for unipolar-only designs like cover detectors | Select only if latching behavior and wider voltage range outweigh reduced sink drive and different magnetic polarity requirement |
| Melexis US1881EUA-ABA-000-REEL | SOT-23 package; 3–24V supply; 50mA sink; 3.5G hysteresis; unipolar operation; higher sensitivity (Bop = 25G) | Higher sensitivity increases false-trigger risk near EMI sources; not rated for −20°C start-up | Prefer for low-field detection in controlled environments; avoid in refrigerator/freezer compartments below −15°C |
Compared with A3212LLHLT-T and US1881EUA-ABA-000-REEL, ATS137-PG-B-A offers optimal balance of 25mA drive strength, −20°C cold-start capability, and 130G operate point-making it uniquely suited for cost-sensitive, high-volume home appliance position sensing where unipolar activation and mechanical reliability are mandatory.
Availability
ATS137-PG-B-A is available at Aetrix Electronics and suitable for refrigerator door sensors, DVD tray detectors, microwave oven safety interlocks, and home security window tamper switches requiring stable component supply across multi-year production cycles.
Supply support for ATS137-PG-B-A 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 and manufacturing operations across Asia and the Americas.
The ATS137 belongs to Diodes' Hall-effect sensor product line, engineered specifically for contactless position and proximity detection in cost-sensitive consumer and white-goods applications where long-term reliability and RoHS compliance are essential.
FAQ
What is the magnetic polarity requirement for ATS137-PG-B-A activation?
The ATS137-PG-B-A responds exclusively to south-pole magnetic fields applied to its branded top surface. North-pole exposure produces no switching action. Its B-grade specification requires ≥130 Gauss south-pole flux for turn-on and ≤10 Gauss for turn-off, with 80G hysteresis ensuring noise immunity.
Can ATS137-PG-B-A drive an LED directly without a series resistor?
No. Although it sinks up to 25mA, a current-limiting resistor is mandatory between Vcc and the LED anode to prevent excessive current and thermal stress. For a 14V supply and typical red LED (2.1V VF), a 470Ω resistor limits current to ~25mA while maintaining safe junction temperature in SIP-3L package.
Is ATS137-PG-B-A qualified for automotive under-hood applications?
No. Its −20°C to +85°C ambient rating and lack of AEC-Q200 qualification exclude it from under-hood use. It is designed for interior appliance and consumer electronics environments where ambient temperatures remain within this range and vibration/stress levels are moderate.
How does reverse polarity protection function in ATS137-PG-B-A?
An internal protection diode blocks current flow when Vcc is connected negative relative to GND, limiting reverse voltage to −20V maximum. This prevents latch-up or permanent damage during assembly errors or field servicing, eliminating need for external reverse-protection diodes in most designs.
ATS137-PG-B-A 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:
- 10mT 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-A FAQ
1.How can I place an order for ATS137-PG-B-A through Aetrix?
Please submit a Request for Quotation (RFQ) for ATS137-PG-B-A 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-A reliable?
The price and inventory of ATS137-PG-B-A 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-A is usually 5 days.
3.What payment methods are accepted for ATS137-PG-B-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATS137-PG-B-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATS137-PG-B-A?
ATS137-PG-B-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATS137-PG-B-A 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-A?
For technical support, including ATS137-PG-B-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATS137-PG-B-A requirements.
6.How does Aetrix verify that ATS137-PG-B-A is sourced from the original manufacturer or authorized distributors?
All ATS137-PG-B-A 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-A meets industry standards.
7.What is the process for return or replacement of ATS137-PG-B-A?
All ATS137-PG-B-A units undergo pre-shipment inspection (PSI). If there is an issue with ATS137-PG-B-A, 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-A part is unused and in its original packaging.
Return procedure for ATS137-PG-B-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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