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Diodes Incorporated AH3323A-P-B
- Part No.:
- AH3323A-P-B
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-SIP
- Datasheet:
-
AH3323A-P-B.pdf
- Description:
- HALL UNIPOLAR SWITCH SIP-3 BULK
- Quantity:
- Payment:
- Shipping:
Inventory:667
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Product details
Overview
AH3323A-P-B from Diodes Incorporated is a high-voltage, ultra-high-sensitivity Hall-effect unipolar switch IC with internal pullup resistor, designed for proximity and position sensing in industrial appliances and personal care devices. It operates from 3.0V to 28V, features BOP/BRP of +55G/+35G typical, -40°C to +125°C temperature range, open-drain output, and integrated Zener clamps on supply and output pins.
For engineers reviewing the AH3323A-P-B datasheet, AH3323A-P-B pinout, AH3323A-P-B application, or AH3323A-P-B equivalent, key selection criteria include magnetic operate/release points, internal pullup resistance (10–18 kΩ), output current limit (30–55 mA), chopper-stabilized architecture for thermal stability, and SIP-3 package compatibility with south-pole actuation.
Technical Context
The AH3323A employs chopper-stabilized architecture with dynamic offset cancellation to suppress thermal drift and mechanical stress effects, enabling stable switching across -40°C to +125°C. Its bandgap-regulated internal supply ensures consistent operation over the full 3.0V–28V input range.
It functions as a unipolar switch: output pulls low when perpendicular magnetic flux density exceeds BOP (+55G typ), remains latched until flux falls below BRP (+35G typ), with 20G typical hysteresis. The internally pulled-up open-drain output requires no external resistor and includes overcurrent limiting and Zener clamping on both VDD and OUTPUT pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.0V to 28V - supports wide-input industrial power rails without external regulation |
| Operate Point (BOP) | +55G typical - enables reliable detection with low-strength magnets or increased air gaps |
| Release Point (BRP) | +35G typical - provides 20G hysteresis to prevent chatter near threshold |
| Internal Pullup Resistance | 10–18 kΩ - eliminates need for external pullup while ensuring logic-compatible rise time |
| Output Current Limit | 30–55 mA - protects internal switch during short-circuit or heavy capacitive loads |
| Startup Time | 10 µs typical - enables fast system response after power-on or wake-up events |
| ESD Rating (HBM) | 8 kV - enhances robustness in handling and assembly environments |
Pinout & Package
SIP-3 (Bulk Pack) package: 3-pin single-inline package with gull-wing leads, 14.5 mm body length, 3.0 mm width, and 1.5 mm height; optimized for through-hole mounting in high-reliability appliance control boards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VDD | Power Supply Input | Accepts 3.0–28V DC; includes reverse-blocking diode and Zener clamp for transient protection |
| 2 GND | Ground Reference | Common return path for internal regulator, sensor, and output stage; decoupling capacitor required |
| 3 OUTPUT | Open-Drain Output | Internally pulled up; sinks current when activated by South pole; includes Zener clamp and 55 mA current limit |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-Stabilized Sensing | Reduces thermal drift of BOP/BRP to ±10% over -40°C to +125°C, enabling stable switching without recalibration |
| Integrated Protection | Reverse-blocking diode + Zener clamps on VDD and OUTPUT eliminate need for external TVS or polarity protection |
| Ultra-High Magnetic Sensitivity | BOP = +55G typical allows use with small, low-cost ferrite magnets at ≥2 mm air gap in flow meter or lid-detect applications |
| Wide-Temperature Operation | Guaranteed functionality from -40°C to +125°C ambient supports placement near motors, heaters, or power stages |
| Lead-Free & Halogen-Free | RoHS 3 compliant with <900 ppm Br/Cl and <1000 ppm Sb - meets global environmental compliance for consumer and industrial products |
Applications
| Washing Machine Lid Detection | Industrial Flow Meter Sensing |
|---|---|
Use Scenario: Detecting lid closure in top-loading washing machines using a magnet embedded in the lid and sensor mounted on the chassis. IC Role / Device Role / Timing Role: Unipolar Hall switch providing open-drain status signal to MCU; latched output holds state during agitation cycle. Use Value: Eliminates mechanical microswitches prone to wear; SIP-3 package withstands vibration and humidity; 28V tolerance accommodates 24V control rail surges. | Use Scenario: Monitoring turbine rotation in water/gas flow meters via magnet-embedded impeller passing near fixed sensor. IC Role / Device Role / Timing Role: Magnetic zero-crossing detector generating pulse train proportional to flow rate; chopper stabilization maintains accuracy across temperature swings. Use Value: 10 µs startup and 4 µs response delay enable >1 kHz pulse rates; internal pullup simplifies PCB layout vs. discrete resistor solutions. |
| Electric Toothbrush Position Sensing | Appliance Door Interlock |
Use Scenario: Confirming brush head attachment in rechargeable electric toothbrushes using magnet-in-head and sensor in handle. IC Role / Device Role / Timing Role: Proximity presence detector interfacing directly with low-power MCU GPIO; operates down to 3.0V during battery discharge. Use Value: Ultra-low 3–5 mA supply current extends battery life; 8 kV ESD rating survives repeated handling during assembly and end-user replacement. | Use Scenario: Safety interlock in microwave ovens or induction cooktops that disables power when door/hatch is opened. IC Role / Device Role / Timing Role: Fail-safe position monitor feeding into hardware watchdog or safety controller; Zener-clamped output prevents false triggers from EMI. Use Value: Reverse-blocking diode and supply Zener protect against accidental reverse-battery connection during service; SIP-3 leadform enables secure through-hole mounting in high-vibration environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall-effect unipolar switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL3323EUA-7 | SOT23-3 package; identical BOP/BRP specs but lower max supply voltage (24V vs. 28V); no internal pullup - requires external 10kΩ resistor | Better suited for space-constrained PCBs; less robust for 24V+ industrial transients | Select when board area is critical and supply is regulated ≤24V; verify external pullup matches load timing requirements |
| US1881LUA-7 | Higher BOP (+70G typ); no internal pullup; 3.3–24V range; lacks Zener clamps on output | Requires external protection circuitry; better for high-field environments with strong magnets | Choose only if magnetic field strength exceeds 70G and external TVS + pullup are acceptable; not drop-in for AH3323A-P-B's protected SIP-3 layout |
Compared with AL3323EUA-7 and US1881LUA-7, the AH3323A-P-B uniquely combines SIP-3 ruggedness, 28V tolerance, internal pullup, and dual Zener clamps - making it optimal for cost-sensitive, high-reliability through-hole applications where board-level protection minimization is critical.
Availability
AH3323A-P-B is available at Aetrix Electronics and suitable for washing machine lid detection, industrial flow meter sensing, electric toothbrush position sensing, and appliance door interlock requiring stable component supply across automotive-grade temperature ranges and long production lifecycles.
Supply support for AH3323A-P-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, manufacturing, and sales operations across Asia, Europe, and North America.
The AH3323A belongs to Diodes' Hall-effect sensor product line, engineered specifically for high-reliability, low-maintenance proximity and position sensing in white goods, personal care, and industrial equipment where robustness, wide voltage range, and extended temperature operation are mandatory.
FAQ
What magnetic polarity activates the AH3323A-P-B?
The AH3323A-P-B is a unipolar switch activated exclusively by the South pole applied to the marked side of the SIP-3 package. Applying a North pole has no effect. The device requires magnetic flux density exceeding +55G (typical) perpendicular to the package surface to pull the output low; release occurs below +35G (typical).
Does the AH3323A-P-B require an external pullup resistor?
No. The AH3323A-P-B integrates a 10–18 kΩ pullup resistor on the open-drain OUTPUT pin, eliminating the need for external components. This simplifies PCB layout and reduces BOM count. The internal resistor is specified across -40°C to +125°C and supports direct interfacing with standard CMOS or TTL inputs.
Can the AH3323A-P-B be used in 24V industrial control systems?
Yes. The AH3323A-P-B is rated for continuous operation from 3.0V to 28V and withstands 32V transient supply stress. Its integrated reverse-blocking diode and Zener clamp on VDD provide robust protection against reverse polarity and voltage spikes common in 24V PLC and motor-control environments.
What is the recommended decoupling capacitor for the AH3323A-P-B?
A 10 nF to 100 nF ceramic capacitor (X7R or better) is recommended between VDD and GND, placed as close as possible to the SIP-3 pins. This stabilizes the internal bandgap regulator, improves noise immunity, and ensures reliable startup within 10 µs - especially critical in electrically noisy industrial settings or near switching power supplies.
AH3323A-P-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 3-SIP
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Unipolar Switch
- Technology:
- Hall Effect
- Polarization:
- South Pole
- Sensing Range:
- 7mT Trip, 2mT Release
- Test Condition:
- -40°C ~ 125°C
- Voltage - Supply:
- 3V ~ 28V
- Current - Supply (Max):
- 5mA
- Current - Output (Max):
- 55mA
- Output Type:
- Open Drain
- Features:
- Temperature Compensated
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 3-SIP
AH3323A-P-B FAQ
1.How can I place an order for AH3323A-P-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3323A-P-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 AH3323A-P-B reliable?
The price and inventory of AH3323A-P-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH3323A-P-B is usually 5 days.
3.What payment methods are accepted for AH3323A-P-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3323A-P-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3323A-P-B?
AH3323A-P-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3323A-P-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 AH3323A-P-B?
For technical support, including AH3323A-P-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3323A-P-B requirements.
6.How does Aetrix verify that AH3323A-P-B is sourced from the original manufacturer or authorized distributors?
All AH3323A-P-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 AH3323A-P-B meets industry standards.
7.What is the process for return or replacement of AH3323A-P-B?
All AH3323A-P-B units undergo pre-shipment inspection (PSI). If there is an issue with AH3323A-P-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 AH3323A-P-B part is unused and in its original packaging.
Return procedure for AH3323A-P-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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