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Diodes Incorporated AH1889-Z-7
- Part No.:
- AH1889-Z-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- SOT-553
- Datasheet:
-
AH1889-Z-7.pdf
- Description:
- MAG SWITCH UNIPOLAR DL SOT553
- Quantity:
- Payment:
- Shipping:
Inventory:7,748
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Product details
Overview
AH1889-Z-7 from Diodes Incorporated is a high-sensitivity dual-output unipolar Hall-effect switch IC in SOT553 package, detecting independent North (OUTPUT2) and South (OUTPUT1) magnetic poles with active-low outputs, 1.65V–3.6V supply range, ±35 G typical operate points, and -40°C to +85°C operation-used in lid/door position sensing for home appliances.
For engineers reviewing the AH1889-Z-7 datasheet, AH1889-Z-7 pinout, AH1889-Z-7 application, or AH1889-Z-7 equivalent, key selection factors include bipolar pole discrimination capability, internal pull-up/pull-down termination, chopper-stabilized temperature stability, and low-voltage operation down to 1.65V in space-constrained consumer and industrial proximity detection.
Technical Context
The AH1889 integrates two monolithic unipolar Hall sensors with independent output paths: OUTPUT1 activates on sufficient South-pole flux (>35 G typ), OUTPUT2 on North-pole flux (<−35 G typ), both with 8 G typical hysteresis and active-low switching. Each output features internal pull-down (for OUTPUT1/2 sink) and pull-up (for high-state retention).
Chopper stabilization cancels offset drift across temperature, delivering <±0.1 G/°C operate point drift and stable switching thresholds from −40°C to +85°C. No sleep mode enables continuous real-time detection with sub-10 µs response time at 1.8V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.65V to 3.6V - supports battery-powered and low-voltage logic interfaces without level-shifting. |
| OUTPUT1 Bop (South) | 35 G typ - triggers reliable lid-open detection with common ferrite magnets at ≥2 mm air gap. |
| OUTPUT2 Bop (North) | −35 G typ - enables directional field discrimination using magnet orientation, not polarity reversal. |
| Hysteresis (Bhy) | 8 G typ - prevents chatter during slow magnetic transitions near threshold, critical for mechanical switch replacement. |
| Operating Temp | −40°C to +85°C - qualified for indoor appliance and industrial control environments without derating. |
| ESD HBM | >4 kV - withstands handling and assembly ESD events without external protection diodes. |
| Output Type | Active-low open-drain with internal pull-up/pull-down - eliminates external resistors, reducing BOM count and PCB area. |
Pinout & Package
Package: SOT553 - 1.6 mm × 1.6 mm × 0.6 mm low-profile surface-mount package with 0.5 mm pin pitch, optimized for compact consumer electronics layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTPUT2 | Active-low North-pole detection output; sinks current when B < −35 G (typ), pulled high otherwise. |
| 2 | GND | Ground reference for Hall sensor bias and output stage; must be low-impedance for noise immunity. |
| 3 | NC | No internal connection; may be left floating or tied to GND for mechanical stability or thermal relief. |
| 4 | VDD | Power input (1.65–3.6 V); requires 100 nF bypass capacitor per datasheet for RF noise suppression. |
| 5 | OUTPUT1 | Active-low South-pole detection output; sinks current when B > +35 G (typ), pulled high otherwise. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent unipolar sensing | Separate OUTPUT1 (South-only) and OUTPUT2 (North-only) enable bidirectional magnetic event detection in one IC. |
| Chopper-stabilized architecture | Reduces temperature-induced offset drift to <±0.1 G/°C, ensuring consistent switch points across operating range. |
| Integrated pull-up/pull-down | Eliminates four external resistors, saving 1.2 mm² PCB area and simplifying layout for SOT553 footprint. |
| RF noise immunity | Validated performance in presence of GSM/ISM-band interference without added shielding or filtering. |
| Lead-free & green compliance | Fully RoHS 2 compliant with <900 ppm Br/Cl and <1000 ppm Sb - meets global environmental regulations for consumer goods. |
Applications
| Home Appliance Lid Detection | Office Equipment Tray Sensing |
|---|---|
Use Scenario: Detecting open/closed state of washing machine detergent drawer or microwave oven door. IC Role / Device Role / Timing Role: Dual-output Hall switch providing independent signals for "lid open" (OUTPUT1) and "lid closed" (OUTPUT2) states via magnet orientation. Use Value: Replaces mechanical microswitches with zero-contact wear, >10M cycle lifetime, and immunity to dust/moisture ingress. | Use Scenario: Monitoring paper tray insertion/removal in laser printers and multifunction copiers. IC Role / Device Role / Timing Role: OUTPUT1 asserts when South-pole magnet on tray approaches; OUTPUT2 remains inactive unless inverted magnet is used. Use Value: Enables tray presence verification without moving parts, reducing service calls due to mechanical failure by >70%. |
| Industrial Panel Door Monitoring | Magnetic Field Direction Identification |
Use Scenario: Verifying access panel closure on HVAC control cabinets or PLC enclosures. IC Role / Device Role / Timing Role: OUTPUT2 activates only when North-pole magnet aligns with marked side-prevents false triggers from stray fields. Use Value: Provides tamper-evident status with directional sensitivity, supporting IP65-rated sealed designs. | Use Scenario: Determining rotational direction of a shaft-mounted dual-pole magnet in small motors or encoders. IC Role / Device Role / Timing Role: Simultaneous sampling of OUTPUT1 and OUTPUT2 yields quadrature-like edge sequence for direction decoding. Use Value: Delivers coarse direction sensing without quadrature decoder IC or additional Hall elements-reducing component count by 2×. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output unipolar Hall switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL33031A-13 | Single-output unipolar switch; no North-pole detection path; 2.7–24 V supply range. | Lacks directional discrimination; suitable only for single-state proximity, not bidirectional sensing. | Select when only South-pole detection is required and higher supply voltage tolerance is needed. |
| US1881EUA-AM | Dual-output but latching (not unipolar); requires alternating North/South to toggle outputs; 3–24 V supply. | Provides memory function (state retention), unsuitable for momentary position detection without external logic. | Choose for push-button-style toggling where power cycling must preserve last state. |
Compared with AL33031A-13 and US1881EUA-AM, AH1889-Z-7 uniquely delivers simultaneous, independent North/South pole detection at ultra-low voltage (1.65 V), enabling true bidirectional sensing in space- and power-constrained applications where alternatives require redesign or compromise.
Availability
AH1889-Z-7 is available at Aetrix Electronics and suitable for home appliance lid detection, office equipment tray sensing, and industrial panel door monitoring requiring stable component supply, full RoHS compliance, and SOT553 footprint compatibility.
Supply support for AH1889-Z-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, headquartered in Plano, Texas, serving automotive, industrial, computing, and consumer markets with high-reliability components.
The AH1889 belongs to Diodes' Hall-effect sensor product line, engineered specifically for contactless position and proximity detection in low-voltage, high-density consumer and industrial systems where size, power, and directional sensitivity are critical.
FAQ
What is the minimum supply voltage required for guaranteed operation of AH1889-Z-7?
The AH1889-Z-7 requires a minimum supply voltage of 1.65 V for guaranteed functional operation across its full temperature range. Below this, output switching behavior is not specified; operation at 1.8 V is recommended for robust margin against ripple and dropout in battery-powered systems.
Can OUTPUT1 and OUTPUT2 be used simultaneously to detect magnet polarity and direction?
Yes-OUTPUT1 activates only with sufficient South-pole flux perpendicular to the marking side, while OUTPUT2 activates only with North-pole flux. Their independent activation enables unambiguous polarity identification and directional sensing without external logic or timing constraints.
Is an external bypass capacitor required for stable operation?
Yes-a 100 nF ceramic capacitor between VDD and GND is mandatory per the datasheet to suppress RF noise and stabilize supply during output transitions. Placement within 2 mm of pins 4 and 2 is required to maintain specified noise immunity and response time.
What does the "Z-7" suffix indicate in AH1889-Z-7?
The "Z" denotes SOT553 packaging, and "-7" specifies 7-inch tape-and-reel packaging containing 3,000 units. The part marking code "KX" appears on the top surface of each device, confirming authenticity and package type per Diodes' ordering information table.
AH1889-Z-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-553
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Unipolar Switch, Dual
- Technology:
- Hall Effect
- Polarization:
- North Pole, South Pole
- Sensing Range:
- -5mT Trip, -0.6mT Release; 5mT Trip, 0.6mT Release
- Test Condition:
- 25°C
- Voltage - Supply:
- 1.65V ~ 3.6V
- Current - Supply (Max):
- 2.1mA (Typ)
- Current - Output (Max):
- 1mA
- Output Type:
- Push-Pull
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-553
AH1889-Z-7 FAQ
1.How can I place an order for AH1889-Z-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH1889-Z-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 AH1889-Z-7 reliable?
The price and inventory of AH1889-Z-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH1889-Z-7 is usually 5 days.
3.What payment methods are accepted for AH1889-Z-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH1889-Z-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH1889-Z-7?
AH1889-Z-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH1889-Z-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 AH1889-Z-7?
For technical support, including AH1889-Z-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH1889-Z-7 requirements.
6.How does Aetrix verify that AH1889-Z-7 is sourced from the original manufacturer or authorized distributors?
All AH1889-Z-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 AH1889-Z-7 meets industry standards.
7.What is the process for return or replacement of AH1889-Z-7?
All AH1889-Z-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH1889-Z-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 AH1889-Z-7 part is unused and in its original packaging.
Return procedure for AH1889-Z-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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