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Diodes Incorporated ATS137-PL-A-B
- Part No.:
- ATS137-PL-A-B
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- -
- Datasheet:
-
ATS137-PL-A-B.pdf
- Description:
- MAGNETIC SWITCH UNIPOLAR 3SIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,700
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Product details
Overview
ATS137-PL-A-B from Diodes Incorporated is a single-pole, unipolar Hall-effect switch IC in SIP-3L package, designed for contactless position and proximity sensing. It operates from 3.5V to 20V DC, delivers 25mA max sinking output current, features reverse polarity protection and temperature compensation, and is rated for –20°C to +85°C ambient operation - used in CD/DVD tray detection, appliance door sensors, and home safety systems.
For engineers reviewing the ATS137-PL-A-B datasheet, ATS137-PL-A-B pinout, ATS137-PL-A-B application, or ATS137-PL-A-B equivalent, key selection criteria include magnetic operate/release points (Bop ≤100 G, Brp ≥10 G), open-collector output drive capability, wide supply voltage tolerance, RoHS-compliant lead-free SIP-3L packaging, and thermal derating behavior up to 85°C ambient.
Technical Context
The ATS137 integrates a Hall voltage generator, low-noise amplifier, Schmitt trigger with 80 G hysteresis, and open-collector NPN pre-driver stage. Its bandgap-regulated internal supply enables stable operation across 3.5–20 V without external regulation.
It responds exclusively to south-pole magnetic flux applied to the branded surface, with Bop ≤100 G and Brp ≥10 G (A-grade). Output saturation voltage is ≤700 mV at 20 mA sink, and supply current remains ≤10 mA at VCC = 20 V with open output.
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 24 V industrial rails without external regulator |
| Output Type | Open-collector NPN - requires external pull-up; sinks up to 25 mA for direct LED or logic-level interface |
| Magnetic Sensitivity | Bop ≤100 G, Brp ≥10 G (A-grade) - enables reliable actuation with low-strength magnets at air gaps up to 3 mm |
| Operating Temperature | –20°C to +85°C - validated for consumer and industrial indoor environments including home appliances |
| Package Power Dissipation | 550 mW at 25°C, derated linearly to 0 mW at 150°C - defines maximum continuous sink current under thermal constraints |
| Reverse Polarity Protection | Withstands –20 V on VCC - eliminates need for external diode in battery-powered or field-wired installations |
Pinout & Package
SIP-3L (Single In-line Package, 3-lead) with gull-wing leads; 2.00 mm × 1.15 mm body, 0.51 mm nominal thickness, branded top surface indicating active Hall element location.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vcc | Positive power supply input | Accepts 3.5–20 V DC; internally regulated to bias Hall plate and analog circuitry |
| GND | Ground reference | Return path for supply current and output sink current; must be low-impedance |
| DO | Digital output (open-collector) | Sinks up to 25 mA when activated; requires external pull-up resistor to define logic HIGH level |
Key Features
| Feature | Design Value |
|---|---|
| Temperature-compensated Hall element | Stable Bop/Brp over –20°C to +85°C - avoids false triggers due to thermal drift in enclosure-mounted sensors |
| Integrated Schmitt trigger | 80 G magnetic hysteresis - rejects mechanical vibration and EMI-induced noise in proximity detection |
| Wide supply range with bandgap regulator | Operates from 3.5 V to 20 V without external components - simplifies power architecture in multi-rail systems |
| Reverse polarity protected input | Withstands –20 V on VCC - prevents damage during battery reversal or field wiring errors |
Applications
| VCD/DVD Tray Detection | Cover/Open-Close Sensing |
|---|---|
Use Scenario: Detecting insertion/ejection of optical disc trays in consumer electronics. IC Role / Device Role / Timing Role: Hall-effect proximity sensor converting mechanical tray motion into digital ON/OFF signal. Use Value: Replaces microswitches with no moving contacts; achieves >1M cycle life and immunity to dust/moisture ingress. |
Use Scenario: Monitoring lid or door closure status in refrigerators, microwaves, and smartphones. IC Role / Device Role / Timing Role: Unipolar magnetic switch triggered by magnet embedded in moving cover. Use Value: Enables ultra-low standby current (<10 mA) and consistent actuation force independent of mechanical wear. |
| Home Safety Door/Window Sensor | Industrial Speed Measurement |
Use Scenario: Contactless monitoring of entry points in residential security systems. IC Role / Device Role / Timing Role: Magnetic presence detector replacing reed relays in wireless sensor nodes. Use Value: Eliminates glass encapsulation fragility and contact bounce; supports battery life >2 years at 1 Hz polling. |
Use Scenario: Counting gear teeth or rotating shaft markers in small appliances and HVAC blowers. IC Role / Device Role / Timing Role: Digital edge-triggered pulse generator synchronized to magnetic target rotation. Use Value: Supports >10 kHz switching frequency with <1.5 µs rise/fall times - sufficient for RPM sensing up to 600k RPM at 1-tooth resolution. |
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 | Higher sensitivity (Bop ≤35 G), SOT-23 package, 3.5–24 V supply, but no reverse polarity protection | Preferred where low-field actuation is required and board space is constrained; unsuitable for reverse-connected battery systems | Select when magnetic gap is >4 mm or supply polarity cannot be guaranteed - requires external protection diode |
| MELEXIS US1881EUA-ABA-000-SP | Bipolar operation (detects both N/S poles), TO-92 package, 3–24 V, 50 mA sink, no temperature compensation | Used in bidirectional sensing (e.g., rotary encoder direction); lacks thermal stability for high-ambient environments | Choose for cost-sensitive, non-temperature-critical applications requiring dual-pole response - not drop-in for unipolar-only designs |
Compared with ATS137-PL-A-B, A3212 offers finer magnetic resolution but adds design complexity for polarity protection, while US1881 provides bipolar flexibility at the expense of thermal drift control - making ATS137 optimal for robust, temperature-stable unipolar detection in consumer enclosures.
Availability
ATS137-PL-A-B is available at Aetrix Electronics and suitable for VCD/DVD loader detection, home appliance cover sensing, and home safety door/window monitoring requiring stable component supply across production lifecycles.
Supply support for ATS137-PL-A-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 high-reliability, low-power contactless switching in cost-sensitive consumer and industrial applications - emphasizing robustness, wide voltage operation, and ease of integration.
FAQ
What is the magnetic polarity requirement for ATS137-PL-A-B actuation?
The ATS137-PL-A-B responds only to the south pole of a magnet applied to its branded surface. North-pole exposure produces no output change. The device's unipolar operation ensures predictable triggering in fixed-orientation mounting, such as behind a refrigerator door or inside a DVD tray latch mechanism.
Can ATS137-PL-A-B drive an LED directly without a current-limiting resistor?
No - ATS137-PL-A-B has an open-collector output and requires an external pull-up resistor to VCC and a series current-limiting resistor for any LED load. With a 12 V supply and typical 2 V LED forward voltage, a 330 Ω resistor limits current to ~25 mA, matching the device's absolute maximum sink rating.
Is the SIP-3L package of ATS137-PL-A-B compatible with standard SOT-23 footprints?
No - SIP-3L has a single-row gull-wing lead configuration (1–2–3 in line), whereas SOT-23 is a three-lead surface-mount package with staggered leads (1–2 on one side, 3 opposite). The ATS137-PL-A-B requires Diodes' AP02001 recommended pad layout, not SOT-23 land patterns.
Does ATS137-PL-A-B require decoupling capacitance on the VCC pin?
Yes - a 0.1 µF ceramic capacitor placed within 2 mm of the VCC and GND pins is recommended per the datasheet to suppress high-frequency noise coupling into the analog Hall front-end, especially in electrically noisy environments like motor-driven appliances.
ATS137-PL-A-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Product Status:
- Obsolete
- Function:
- -
- Technology:
- -
- Polarization:
- -
- Sensing Range:
- -
- Test Condition:
- -
- Voltage - Supply:
- -
- Current - Supply (Max):
- -
- Current - Output (Max):
- -
- Output Type:
- -
- Features:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
ATS137-PL-A-B FAQ
1.How can I place an order for ATS137-PL-A-B through Aetrix?
Please submit a Request for Quotation (RFQ) for ATS137-PL-A-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-A-B reliable?
The price and inventory of ATS137-PL-A-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-A-B is usually 5 days.
3.What payment methods are accepted for ATS137-PL-A-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATS137-PL-A-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATS137-PL-A-B?
ATS137-PL-A-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATS137-PL-A-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-A-B?
For technical support, including ATS137-PL-A-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATS137-PL-A-B requirements.
6.How does Aetrix verify that ATS137-PL-A-B is sourced from the original manufacturer or authorized distributors?
All ATS137-PL-A-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-A-B meets industry standards.
7.What is the process for return or replacement of ATS137-PL-A-B?
All ATS137-PL-A-B units undergo pre-shipment inspection (PSI). If there is an issue with ATS137-PL-A-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-A-B part is unused and in its original packaging.
Return procedure for ATS137-PL-A-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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