My Inquiry
My Account
Diodes Incorporated AH373-WG-7
- Part No.:
- AH373-WG-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AH373-WG-7.pdf
- Description:
- MAGNETIC SWITCH LATCH SC59-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,961
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AH373-WG-7 from Diodes Incorporated is a bipolar Hall-effect latch sensor with integrated pull-up resistor, designed for high-temperature rotor position sensing in BLDC motor commutation. It operates from 2.2V to 20V, delivers 25mA sink current, features ±30G typical operate/release points (Bop/Brp), and functions across –40°C to +125°C in SC59 package.
For engineers reviewing the AH373-WG-7 datasheet, AH373-WG-7 pinout, AH373-WG-7 application, or AH373-WG-7 equivalent, key selection criteria include magnetic hysteresis (60G), internal band-gap regulation, output saturation voltage (≤400mV at 20mA), and SIP-3/SC59/SOT23 package compatibility for PCB layout flexibility.
Technical Context
The AH373-WG-7 implements a fully integrated analog signal chain: on-chip Hall plate generates voltage proportional to perpendicular magnetic flux, followed by low-noise amplifier and comparator with built-in hysteresis to reject EMI-induced switching noise. Its output driver uses open-drain N-channel MOSFET topology with internal 10kΩ pull-up resistor.
Temperature compensation is achieved via an internal band-gap regulator that stabilizes supply to internal circuits across the full –40°C to +125°C range, enabling consistent Bop/Brp performance and low supply current (typ. 2mA) even at 125°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.2V–20V operating; enables direct connection to 3.3V, 5V, 12V, or 24V industrial rails without external regulation |
| Output Sink Current | 25mA max; drives standard logic inputs, optocouplers, or small-signal MOSFET gates directly |
| Magnetic Hysteresis | 60G typical; prevents chatter during slow or noisy magnetic transitions near switching thresholds |
| Operating Temperature | –40°C to +125°C; qualified for under-hood automotive, industrial motor control, and HVAC blower applications |
| Output Saturation Voltage | ≤400mV at 20mA; ensures reliable low-state logic recognition with margin across temperature and voltage |
| Internal Pull-up Resistor | 10kΩ typical; eliminates need for external pull-up, reducing BOM count and board space |
| Power Dissipation (SC59) | 230mW at 25°C; derates linearly to 46mW at 125°C - defines maximum continuous output duty cycle in sealed enclosures |
Pinout & Package
AH373-WG-7 is supplied in SC59 package: 3-pin single-inline surface-mount package with gull-wing leads, 2.8mm × 3.0mm body, 0.95mm height, and 1.10mm lead pitch. Pin 1 = VDD, Pin 2 = GND, Pin 3 = OUTPUT (open-drain).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VDD) | Positive supply input | Accepts 2.2–20V DC; powers internal regulator, Hall plate, amplifier, comparator, and output stage |
| 2 (GND) | Ground reference | Common return path for supply and output current; must be low-impedance to minimize noise coupling |
| 3 (OUTPUT) | Open-drain digital output | Sinks up to 25mA when active; pulled high internally to VDD via 10kΩ resistor when inactive |
Key Features
| Feature | Design Value |
|---|---|
| Bipolar latch operation | Requires alternating South/North pole exposure to toggle state - ideal for rotating shaft position detection with magnet pairs |
| Integrated band-gap regulator | Stabilizes internal bias voltages across temperature and supply variation, ensuring consistent Bop/Brp over –40°C to +125°C |
| 25mA output sink capability | Directly interfaces with standard CMOS/TTL inputs, PLC I/O modules, and microcontroller GPIO without external driver stages |
| Internal 10kΩ pull-up resistor | Reduces component count and layout complexity; eliminates risk of floating output during power-up or reset sequences |
| RoHS-compliant & halogen-free | Fully green device per Diodes Inc. definition (<900ppm Br, <900ppm Cl, <1000ppm Sb); compliant with EU RoHS 2 (2011/65/EU) |
Applications
| BLDC Motor Commutation | Rotary Encoder |
|---|---|
Use Scenario: Detecting rotor magnet polarity in 3-phase brushless DC motors to sequence phase winding energization. IC Role / Device Role / Timing Role: Digital position sensor providing synchronized edge-triggered signals to motor gate driver ICs. Use Value: Enables precise 120° electrical angle timing with 60G hysteresis to suppress vibration-induced false triggers during high-speed rotation. | Use Scenario: Converting mechanical rotation into quadrature digital pulses for direction and speed feedback in servo systems. IC Role / Device Role / Timing Role: Bipolar latch generating clean, debounced pulse edges aligned to magnet pole transitions. Use Value: Eliminates external Schmitt triggers or RC filters due to built-in hysteresis and noise-rejecting comparator design. |
| RPM Monitoring | Contactless Current Switch |
Use Scenario: Measuring rotational speed of fans, pumps, or conveyors using a single magnet affixed to the shaft. IC Role / Device Role / Timing Role: Pulse generator whose frequency correlates linearly with shaft RPM; output compatible with MCU timer capture inputs. Use Value: Delivers stable low-VOL (≤400mV) pulses up to 25kHz, enabling accurate period measurement even with long PCB traces. | Use Scenario: Detecting current flow in a conductor via its magnetic field - e.g., leakage detection in power supplies or ground-fault sensing. IC Role / Device Role / Timing Role: Threshold-based magnetic switch activated when conductor current exceeds trip level defined by magnet geometry and air gap. Use Value: No galvanic isolation required; operates reliably in high-voltage environments where optocouplers or shunt resistors introduce loss or safety risks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall-effect latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL373Q-7 | Same functional spec but AEC-Q100 Grade 0 qualified (–40°C to +150°C junction); higher Bop/Brp tolerance (±15G vs ±25G) | Required for automotive powertrain or ADAS modules needing extended temperature validation | Select AL373Q-7 only if AEC-Q100 qualification and 150°C junction rating are mandatory |
| US1881LUA-AB | Lower supply range (3.5–24V); no internal pull-up; requires external 4.7kΩ resistor; 20mA sink only | Suitable for cost-sensitive industrial controls where external pull-up is acceptable and 20mA load suffices | Choose US1881LUA-AB when BOM cost reduction outweighs board space savings from integrated pull-up |
Compared with AL373Q-7 and US1881LUA-AB, AH373-WG-7 provides optimal balance of wide supply range (2.2V min), integrated pull-up, and industrial-grade temperature support - making it preferred for non-automotive motor control where simplicity and robustness are prioritized over automotive qualification or lowest unit cost.
Availability
AH373-WG-7 is available at Aetrix Electronics and suitable for BLDC motor commutation, rotary encoder feedback, and RPM monitoring requiring stable component supply in industrial automation, HVAC fan control, and appliance motor systems.
Supply support for AH373-WG-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 components for industrial, computing, and consumer markets.
AH373 belongs to Diodes' Hall-effect sensor product line, engineered specifically for contactless position and speed sensing in harsh thermal environments - emphasizing latch stability, magnetic noise immunity, and simplified system integration.
FAQ
What is the magnetic polarity sensitivity of AH373-WG-7?
The AH373-WG-7 is sensitive to South pole approach for SIP-3 and SOT23 packages, but North pole for SC59 (including WG-7). This is defined by die orientation relative to marking side - confirmed in DS31173 Rev. 12, page 4. Polarity reversal is required to toggle output state, enabling true latch behavior.
Does AH373-WG-7 require an external bypass capacitor?
Yes - a 100nF ceramic capacitor between VDD and GND is recommended per DS31173 page 3 to stabilize the internal regulator and improve noise immunity. Without it, the device may exhibit erratic switching under EMI or supply transients, especially in motor drive environments.
Can AH373-WG-7 interface directly with a 3.3V microcontroller GPIO?
Yes - its output sinks to ≤400mV at 20mA, well below 0.8V logic-low threshold for 3.3V CMOS. The internal 10kΩ pull-up ensures high-state voltage equals VDD (not 3.3V), so level-shifting is unnecessary if the MCU input tolerates 5V–20V on its pin (check datasheet). Otherwise, add a series resistor or clamp diode.
Is AH373-WG-7 still recommended for new designs?
No - Diodes Incorporated marks AH373-WG-7 as "NRND" (Not Recommended for New Design) in its ordering table (DS31173 page 6). While fully functional and supported, new designs should consider AH3782 or AL373Q-7 for enhanced specs and longer-term availability - AH373 remains viable for legacy refresh or cost-constrained production.
AH373-WG-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Latch
- Technology:
- Hall Effect
- Polarization:
- South Pole
- Sensing Range:
- 6mT Trip, -6mT Release
- Test Condition:
- 25°C
- Voltage - Supply:
- 2.2V ~ 20V
- Current - Supply (Max):
- 4mA
- Current - Output (Max):
- 25mA
- Output Type:
- Open Drain
- Features:
- Temperature Compensated
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-59-3
AH373-WG-7 FAQ
1.How can I place an order for AH373-WG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH373-WG-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 AH373-WG-7 reliable?
The price and inventory of AH373-WG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH373-WG-7 is usually 5 days.
3.What payment methods are accepted for AH373-WG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH373-WG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH373-WG-7?
AH373-WG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH373-WG-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 AH373-WG-7?
For technical support, including AH373-WG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH373-WG-7 requirements.
6.How does Aetrix verify that AH373-WG-7 is sourced from the original manufacturer or authorized distributors?
All AH373-WG-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 AH373-WG-7 meets industry standards.
7.What is the process for return or replacement of AH373-WG-7?
All AH373-WG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH373-WG-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 AH373-WG-7 part is unused and in its original packaging.
Return procedure for AH373-WG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AH373-WG-7 Tags
-
TCS40DLR,LF
Toshiba Semiconductor and Storage
-
DRV5032FBDBZR
Texas Instruments
-
DRV5032FADBZR
Texas Instruments
-
AH1912-FA-7
Diodes Incorporated
-
AH1913-W-7
Diodes Incorporated
-
AH1911-W-7
Diodes Incorporated
-
TLI49631MXTSA1
Infineon Technologies
-
SM453R
Honeywell Sensing and Productivity Solutions
-
MLX90248ESE-EBA-000-RE
Melexis Technologies NV
-
MLX92213ELD-AAA-000-RE
Melexis Technologies NV
-
TLE4913HTSA1
Infineon Technologies
-
US5781ESE-AAA-000-RE
Melexis Technologies NV
Tech Hub
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
