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Diodes Incorporated AH375-WL-7
- Part No.:
- AH375-WL-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AH375-WL-7.pdf
- Description:
- IC HALL LATCH 1PH 25MA SC59-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,501
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Product details
Overview
AH375-WL-7 from Diodes Incorporated is a bipolar Hall-effect latched sensor IC designed for electronic commutation in brushless DC motors and speed-sensing applications. It features an integrated Hall voltage generator, comparator, Schmitt trigger with 60 Gauss hysteresis, open-drain output capable of sinking 25 mA, and operates from 2.2 V to 20 V across –40°C to +125°C.
For engineers reviewing the AH375-WL-7 datasheet, AH375-WL-7 pinout, AH375-WL-7 application, or AH375-WL-7 equivalent, this page delivers verified magnetic thresholds (Bop = 5–60 G, Brp = –60 to –5 G), SC59 package mapping, thermal derating curves, and validated alternatives for BLDC motor control and revolution counting circuits.
Technical Context
The AH375-WL-7 implements a monolithic Hall-effect latch with internal band-gap regulation for supply-independent magnetic switching. Its Schmitt-triggered output provides noise-immune digital state retention until magnetic polarity reversal crosses the release point.
It functions as a magnetic polarity detector with fixed Bop/Brp thresholds referenced to the branded surface side. The open-drain output interfaces directly with N-channel MOSFET pre-drivers or logic-level inputs without external pull-up constraints beyond sink-current capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.2 V to 20 V - Enables direct integration into 3.3 V, 5 V, 12 V, and 24 V motor-control rails without external regulators. |
| Output Type | Open-drain - Allows wired-OR configuration and flexible pull-up selection up to 30 V off-state voltage rating. |
| Output Sink Current | 25 mA max - Sufficient to drive gate resistors of low-side N-MOSFETs or interface with standard logic families. |
| Magnetic Hysteresis | 60 Gauss - Ensures robust immunity to mechanical vibration and EMI-induced false triggering in rotating systems. |
| Operating Temperature | –40°C to +125°C - Qualified for under-hood automotive fan control and industrial BLDC motor environments. |
| Package | SC59 (SOT23-equivalent) - Surface-mount footprint compatible with high-density PCB layouts and automated assembly. |
Pinout & Package
Package: SC59 (3-pin SOT23 variant, lead-free, RoHS-compliant). Dimensions: 2.80 mm × 1.60 mm × 0.95 mm (L × W × H), with 0.95 mm body height and 0.75 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Vdd | Positive power supply input | Accepts 2.2–20 V DC; powers internal regulator, Hall plate, and signal chain - must be decoupled near pin. |
| 2 - GND | Ground reference | Common return path for Hall sensing, comparator, and output stage - requires low-impedance connection to PCB ground plane. |
| 3 - OUT | Open-drain digital output | Sinks up to 25 mA when active; floats high when inactive - requires external pull-up resistor for logic-level output. |
Key Features
| Feature | Design Value |
|---|---|
| Bipolar latching operation | Retains output state until magnetic polarity reversal crosses Brp - eliminates need for continuous field presence in rotor position sensing. |
| Temperature-compensated Hall element | Stable Bop/Brp thresholds over –40°C to +125°C - avoids recalibration in thermally varying motor housings. |
| Wide supply range (2.2–20 V) | Eliminates dedicated LDO for Hall sensor in multi-rail systems - simplifies power architecture in BLDC driver modules. |
| RoHS- and halogen-free "Green" construction | Meets IEC 61249-2-21 and JEDEC J-STD-609A Class 1 requirements - supports automotive and industrial environmental compliance programs. |
Applications
| BLDC Motor Commutation | Brushless Fan Control |
|---|---|
Use Scenario: Rotor position detection in 3-phase BLDC motors for trapezoidal commutation timing. IC Role / Device Role / Timing Role: Magnetic latch providing synchronized edge-triggered signals to MCU or gate driver IC for phase-switching sequence. Use Value: 60 Gauss hysteresis prevents chatter during pole transition; open-drain output interfaces directly with 3.3 V/5 V logic-level drivers. |
Use Scenario: Speed feedback loop in 12 V/24 V cooling fans used in servers and power supplies. IC Role / Device Role / Timing Role: Revolution counter generating pulses per rotation for RPM calculation and closed-loop fan speed regulation. Use Value: Wide 2.2–20 V supply range allows direct connection to fan's main rail; –40°C to +125°C rating ensures reliability in hot chassis environments. |
| Rotary Encoder Interface | Industrial Speed Monitoring |
Use Scenario: Non-contact angular position sensing on rotating shafts in pumps and compressors. IC Role / Device Role / Timing Role: Digital magnetic switch converting magnet passage into clean, debounced pulse train for microcontroller input capture. Use Value: Schmitt-triggered output eliminates need for external RC filtering; SC59 package enables compact placement near rotating magnets. |
Use Scenario: Real-time rotational speed measurement in conveyor belt drives and HVAC blowers. IC Role / Device Role / Timing Role: Magnetic event detector feeding frequency-to-voltage converter or timer-based RPM computation circuitry. Use Value: 25 mA sink current supports direct driving of optocoupler LEDs or level-shifting transistors without buffer stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall-effect latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AH3774-WL-7 | Successor part with tighter Bop/Brp tolerance (±5 G vs ±15 G), lower quiescent current (1.5 mA vs 2–4 mA), and same SC59 package. | Designed for higher-precision rotor position detection in automotive-grade BLDC systems requiring AEC-Q100 qualification. | Select AH3774-WL-7 for new designs needing improved magnetic consistency and lower power; AH375-WL-7 remains viable for cost-sensitive legacy replacements. |
| US1881N-DS-T | Unipolar latch (Bop only, no Brp), 3–24 V supply, 20 mA sink, TO-92 package - lacks bipolar hysteresis and temperature compensation. | Suitable for simple proximity detection but not for bidirectional rotor sensing where polarity reversal is required. | Use US1881N-DS-T only in unidirectional motion detection; avoid in BLDC commutation where magnetic polarity reversal defines state hold. |
Compared with AH3774-WL-7, the AH375-WL-7 offers broader magnetic threshold spread and higher supply current, making it more tolerant of magnet strength variation but less precise in high-resolution timing. Versus US1881N-DS-T, it delivers true bipolar latching essential for reliable motor phase sequencing.
Availability
AH375-WL-7 is available at Aetrix Electronics and suitable for brushless DC motor commutation, cooling fan speed control, rotary encoder interfaces, and industrial speed monitoring requiring stable component supply despite its obsolete status.
Supply support for AH375-WL-7 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 power management, signal integrity, and sensing solutions for industrial and automotive markets.
The AH375 belongs to Diodes' Hall-effect sensor product line, engineered specifically for robust, low-cost rotor position feedback in brushless DC motor systems operating across wide temperature and voltage ranges.
FAQ
Is AH375-WL-7 still in production?
No - AH375-WL-7 is officially obsolete and discontinued per Diodes Incorporated's DS31172 Rev. 8 documentation. However, Aetrix Electronics maintains limited legacy stock with full traceability and supports design-in continuity through documented alternatives like AH3774-WL-7.
What is the correct orientation for mounting AH375-WL-7 relative to the magnet?
The branded surface (marked "375") must face the magnet's south pole for proper activation. When the south pole approaches the branded side, output pulls low at B > Bop (5–60 G); output releases only when south pole retreats below Brp (–60 to –5 G).
Can AH375-WL-7 drive a MOSFET gate directly?
Yes - its 25 mA open-drain output can sink sufficient current to discharge gate capacitance of small-signal N-channel MOSFETs (e.g., 2N7002, DMN2004) when paired with an appropriate pull-up resistor (e.g., 10 kΩ to 12 V).
Does AH375-WL-7 require an external capacitor on Vdd?
Yes - a 0.1 µF ceramic decoupling capacitor is required between Vdd and GND, placed as close as possible to pins 1 and 2, to stabilize the internal band-gap regulator and suppress supply noise induced by motor switching transients.
AH375-WL-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Cut Tape (CT)
- 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:
- Surface Mount
- Supplier Device Package:
- SC-59-3
AH375-WL-7 FAQ
1.How can I place an order for AH375-WL-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH375-WL-7 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 AH375-WL-7 reliable?
The price and inventory of AH375-WL-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH375-WL-7 is usually 5 days.
3.What payment methods are accepted for AH375-WL-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH375-WL-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH375-WL-7?
AH375-WL-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH375-WL-7 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 AH375-WL-7?
For technical support, including AH375-WL-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH375-WL-7 requirements.
6.How does Aetrix verify that AH375-WL-7 is sourced from the original manufacturer or authorized distributors?
All AH375-WL-7 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 AH375-WL-7 meets industry standards.
7.What is the process for return or replacement of AH375-WL-7?
All AH375-WL-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH375-WL-7, 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 AH375-WL-7 part is unused and in its original packaging.
Return procedure for AH375-WL-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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