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Diodes Incorporated ATS137-PL-B-B
- Part No.:
- ATS137-PL-B-B
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-SIP
- Datasheet:
-
ATS137-PL-B-B.pdf
- Description:
- MAGNETIC SWITCH UNIPOLAR 3SIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,880
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Product details
Overview
ATS137-PL-B-B from Diodes Incorporated is a single-pole, south-activated Hall-effect switch IC with open-collector output, operating from 3.5V to 20V, rated for -20°C to +85°C, delivering up to 25mA sink current, and featuring reverse polarity protection and temperature compensation - used in cover detection, tray position sensing, and home safety systems.
For engineers reviewing the ATS137-PL-B-B datasheet, ATS137-PL-B-B pinout, ATS137-PL-B-B application, or ATS137-PL-B-B equivalent, key selection criteria include magnetic operate/release points (Bop ≤ 130 G, Brp ≥ 10 G), output saturation voltage (≤700 mV at 20 mA), supply current (≤10 mA), and SIP-3L package compatibility with lead-free PCB assembly.
Technical Context
The ATS137 integrates a Hall plate, chopper-stabilized amplifier, Schmitt trigger with 80 G hysteresis, and open-collector NPN pre-driver - enabling noise-immune digital switching in varying thermal and magnetic environments. Its bandgap-regulated internal supply ensures stable operation across the full 3.5–20 V range.
Designed for unipolar south-pole actuation only, the device exhibits no response to north-pole fields and requires no external biasing or timing components. The B-grade magnetic specification (Bop ≤ 130 G, Brp ≥ 10 G) is exclusive to SIP-3L packaging and optimized for mechanical gap tolerance in consumer appliance lid/door sensors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.5 V to 20 V - supports direct connection to 5 V, 12 V, or 19 V rails without external regulation. |
| Output Sink Current | 25 mA max - drives standard pull-up resistors (e.g., 10 kΩ @ 5 V) or small relays directly. |
| Operating Temperature | -20°C to +85°C - validated for use in consumer appliances and industrial enclosures without derating. |
| Magnetic Bop / Brp | ≤130 G / ≥10 G - enables reliable actuation through plastic housings up to 2.5 mm thick with typical neodymium magnets. |
| Vce(SAT) | ≤700 mV at 20 mA - minimizes power loss and self-heating during sustained ON-state operation. |
| Reverse Polarity Protection | Withstands -20 V on VCC - eliminates need for external series diode in battery-powered or field-wired installations. |
Pinout & Package
ATS137-PL-B-B is housed in a lead-free SIP-3L (Single In-line Package, 3-pin) package with gull-wing leads, 2.00 mm ±0.10 mm body width, and branded top surface marking "137" - compatible with standard through-hole reflow or wave soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vcc (Pin 1) | Positive supply input | Accepts 3.5–20 V DC; internally regulated to power Hall sensor and logic blocks. |
| GND (Pin 2) | Ground reference | Common return path for supply and output current; must be low-impedance for noise immunity. |
| DO (Pin 3) | Digital open-collector output | Sinks up to 25 mA when active; requires external pull-up to define logic HIGH level. |
Key Features
| Feature | Design Value |
|---|---|
| Temperature-compensated Hall element | Stable Bop/Brp over -20°C to +85°C - eliminates calibration drift in ambient-varying applications. |
| Integrated Schmitt trigger | 80 G magnetic hysteresis - prevents chatter during slow or oscillating magnet approach/retraction. |
| Open-collector pre-driver | 25 mA sink capability with <700 mV saturation - interfaces directly with microcontroller GPIO or discrete load switches. |
| Reverse polarity protection | Withstands -20 V on Vcc - protects against accidental battery reversal in portable or serviceable equipment. |
Applications
| CD/DVD Tray Detection | Cover/Open-Close Sensing |
|---|---|
|
Use Scenario: Detecting insertion/ejection of optical disc trays in consumer DVD players and set-top boxes. IC Role / Device Role / Timing Role: Digital position sensor converting mechanical tray motion into clean TTL-compatible logic transitions. Use Value: Replaces electromechanical microswitches with >100M cycle lifetime and immunity to dust, moisture, and contact wear. |
Use Scenario: Monitoring lid closure status in microwave ovens, refrigerators, and laptop clamshells. IC Role / Device Role / Timing Role: Contactless proximity detector triggering safety interlocks or system wake-up signals. Use Value: Enables zero-force, silent actuation with consistent 10–130 G magnetic threshold across production units. |
| Home Security Door Sensor | Appliance Safety Interlock |
|
Use Scenario: Window/door position monitoring in wireless alarm systems using low-power magnet pairs. IC Role / Device Role / Timing Role: Low-current (≤10 mA) magnetic switch providing tamper-proof entry detection. Use Value: Operates reliably at 3.5 V, supporting coin-cell or energy-harvesting transmitters without voltage boosting. |
Use Scenario: Enabling motor or heating element only when oven door or washing machine lid is fully closed. IC Role / Device Role / Timing Role: Fail-safe enable signal generator with reverse-polarity and thermal robustness. Use Value: Eliminates risk of relay welding or contact arcing under repeated high-current switching cycles. |
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 | Bipolar operation (south/north toggle), 3.5–24 V, SOT-23 package, 5 mA supply current | Requires alternating pole actuation; unsuitable for unipolar-only detection like cover-open logic | Select only if bidirectional latching behavior is required; not drop-in for ATS137's unipolar mode |
| Melexis US1881EUA-ABA-000-REEL | Unipolar south-activate, 3–24 V, TO-92 package, 3.5 mA supply current, 50 G hysteresis | Larger TO-92 footprint; lower Bop (≤50 G) reduces air-gap margin in thick-plastic enclosures | Prefer for ultra-low-power battery systems where SIP-3L mounting is not constrained |
Compared with A3212LLHLT-T and US1881EUA-ABA-000-REEL, ATS137-PL-B-B offers higher magnetic sensitivity (130 G Bop), SIP-3L through-hole compatibility, and proven thermal stability in consumer white goods - making it optimal for cost-sensitive, high-volume cover-detection designs requiring mechanical simplicity and long-term reliability.
Availability
ATS137-PL-B-B is available at Aetrix Electronics and suitable for CD/DVD tray detection, home appliance cover sensing, and security door monitoring requiring stable component supply, RoHS-compliant lead-free construction, and SIP-3L through-hole manufacturability.
Supply support for ATS137-PL-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 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 industrial appliances - emphasizing robustness, magnetic consistency, and ease of integration.
FAQ
What is the magnetic polarity requirement for ATS137-PL-B-B activation?
The ATS137-PL-B-B activates only with a south magnetic pole presented to its branded top surface. It does not respond to north poles or alternating fields. The B-grade version has an operate point ≤130 Gauss and release point ≥10 Gauss, ensuring reliable switching through typical plastic housings up to 2.5 mm thick using standard NdFeB magnets.
Can ATS137-PL-B-B drive an LED directly without a current-limiting resistor?
No - ATS137-PL-B-B has an open-collector output and cannot source current. To drive an LED, connect the anode to a positive supply (e.g., 5 V) and the cathode to the DO pin, then select a series resistor to limit current to ≤25 mA. For example, with 5 V supply and 2 V LED forward voltage, a 120 Ω resistor sets ~25 mA sink current.
Is ATS137-PL-B-B compatible with reflow soldering processes?
Yes - the SIP-3L package is rated for lead-free reflow per J-STD-020. Peak temperature must not exceed 260°C for ≤30 seconds. The device's 150°C maximum junction temperature and 550 mW power dissipation at 25°C allow safe processing in standard convection or vapor-phase reflow profiles.
Does ATS137-PL-B-B require an external capacitor on the Vcc pin?
No external bypass capacitor is required for basic operation, but a 0.1 µF ceramic capacitor placed within 5 mm of the Vcc and GND pins is recommended to suppress high-frequency noise and improve immunity to EFT bursts - especially in electrically noisy environments like motor-driven appliances or industrial control panels.
ATS137-PL-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:
- 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-PL-B-B FAQ
1.How can I place an order for ATS137-PL-B-B through Aetrix?
Please submit a Request for Quotation (RFQ) for ATS137-PL-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-PL-B-B reliable?
The price and inventory of ATS137-PL-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-PL-B-B is usually 5 days.
3.What payment methods are accepted for ATS137-PL-B-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATS137-PL-B-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATS137-PL-B-B?
ATS137-PL-B-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATS137-PL-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-PL-B-B?
For technical support, including ATS137-PL-B-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATS137-PL-B-B requirements.
6.How does Aetrix verify that ATS137-PL-B-B is sourced from the original manufacturer or authorized distributors?
All ATS137-PL-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-PL-B-B meets industry standards.
7.What is the process for return or replacement of ATS137-PL-B-B?
All ATS137-PL-B-B units undergo pre-shipment inspection (PSI). If there is an issue with ATS137-PL-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-PL-B-B part is unused and in its original packaging.
Return procedure for ATS137-PL-B-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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