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Diodes Incorporated AH1911-W-7
- Part No.:
- AH1911-W-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AH1911-W-7.pdf
- Description:
- MAGNETIC SWITCH OMNIPOL SC59-3
- Quantity:
- Payment:
- Shipping:
Inventory:16,457
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Product details
Overview
AH1911-W-7 from Diodes Incorporated is an ultra-low power digital omnipolar Hall-effect switch IC in SC59 package, operating from 1.6V to 5.5V supply, consuming only 1.6μA average current at 3V, with push-pull output, BOP ±30–90 Gauss, and -40°C to +85°C temperature range - deployed in battery-powered utility meters, smoke detectors, and smart cover detection.
For engineers reviewing the AH1911-W-7 datasheet, AH1911-W-7 pinout, AH1911-W-7 application, or AH1911-W-7 equivalent, key selection criteria include magnetic operate/release thresholds, micropower sleep/awake timing (45μs awake, 45ms period), push-pull drive capability (0.1V low-level output at 0.1mA), chopper-stabilized temperature stability, and SC59 footprint compatibility with space-constrained IoT sensors.
Technical Context
The AH1911-W-7 implements a hibernating clocking system that cycles between ultra-low-power sleep mode (0.6–1μA) and brief awake windows (45μs typical) to sample magnetic field, enabling 1.6μA average supply current. Its chopper-stabilized Hall plate cancels offset drift across temperature and supply voltage variations.
Omnipolar switching responds to either North or South pole with guaranteed operate (BOP) and release (BRP) points - ±30–90 Gauss and ±22–67 Gauss respectively - and 15 Gauss minimum hysteresis (BHY), ensuring noise-immune latching behavior in dynamic mechanical environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.6V to 5.5V - supports single-cell Li-ion, alkaline, or low-voltage MCU I/O domains without level-shifting. |
| Average Supply Current | 1.6μA at 3V - enables >10-year battery life in 10-year smoke detector designs using CR123A cells. |
| Output Type | Push-pull - drives logic-high and logic-low directly; eliminates external pull-up resistor and saves PCB area. |
| Operate Point (BOP) | ±30–90 Gauss - detects weak magnetic fields from small neodymium magnets at air gaps up to 3mm. |
| Hysteresis (BHY) | 15 Gauss minimum - prevents chatter during slow magnet approach/retraction in position-sensing applications. |
| Awake Time | 45μs typical - ensures rapid response to magnetic transitions while maintaining micropower operation. |
| Operating Temperature | -40°C to +85°C - qualified for outdoor utility meter deployments and industrial edge sensor nodes. |
Pinout & Package
Package: SC59 - surface-mount, 3-pin, low-profile (0.38mm typ. height), 2.8mm × 1.6mm footprint, RoHS-compliant, lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VDD | Power supply input | Accepts 1.6–5.5V; requires 100nF decoupling capacitor placed adjacent to pin for noise immunity. |
| 2 OUTPUT | Digital output signal | Push-pull active-low output; sinks 1mA, sources 0.1mA; compatible with 1.8V/3.3V/5V logic interfaces. |
| 3 GND | Ground reference | Return path for Hall sensor, amplifier, and output driver; must be low-impedance connection to minimize offset error. |
Key Features
| Feature | Design Value |
|---|---|
| Omnipolar magnetic sensing | Detects both North and South poles - simplifies mechanical assembly by eliminating magnet polarity orientation constraints. |
| Hibernating clock architecture | Reduces average current to 1.6μA - extends battery life in maintenance-free IoT endpoints beyond 5 years. |
| Chopper-stabilized Hall element | Minimizes BOP/BRP drift to <±5% over -40°C to +85°C - ensures consistent switching across environmental extremes. |
| 6kV HBM ESD rating | Withstands electrostatic discharge during handling and field deployment - reduces need for external protection components. |
| SC59 package compatibility | Matches industry-standard SOT-23 footprint - enables drop-in replacement and leverages existing reflow profiles and test fixtures. |
Applications
| Smart Cover Detection | Utility Meter Tamper Sensing |
|---|---|
Use Scenario: Detect lid closure on tablet PCs or clamshell phones using embedded magnet and Hall switch. IC Role / Device Role / Timing Role: Digital position switch providing wake-on-open interrupt to host MCU via push-pull output. Use Value: Eliminates mechanical switches prone to wear; enables zero-power standby with sub-2μA quiescent draw during lid-closed state. | Use Scenario: Monitor unauthorized access to gas/water meter enclosures via magnetic seal integrity check. IC Role / Device Role / Timing Role: Tamper event detector triggering secure log entry and RF alert when seal magnet is removed. Use Value: Operates reliably for >10 years on primary lithium cell due to 1.6μA average current and wide 1.6–5.5V supply range. |
| Smoke Detector End-of-Life Alert | IoT Asset Tracking Latch |
Use Scenario: Trigger low-battery or sensor-fault alert when internal test magnet is actuated during self-test cycle. IC Role / Device Role / Timing Role: Self-test stimulus switch interfacing with microcontroller ADC or GPIO for periodic verification. Use Value: Chopper stabilization ensures consistent BOP/BRP across temperature swings inside plastic enclosures - no calibration required. | Use Scenario: Latch open/closed state of cargo container doors or medical cabinet locks in battery-powered trackers. IC Role / Device Role / Timing Role: Non-volatile position latch with hysteresis preventing false triggers from vibration or stray fields. Use Value: 15 Gauss hysteresis and ±30–90 Gauss operate window enable reliable detection despite magnet misalignment or aging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar omnipolar Hall-effect switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ALLEGRO A3212LLHLT-T | Higher average current (5μA), wider BOP range (±25–100G), open-drain output only | Requires external pull-up; less suitable for direct MCU GPIO drive without level translation | Select if higher magnetic sensitivity or automotive qualification (AEC-Q100) is required |
| MELEXIS US5881LUA-ABA-000-RE | Lower sleep current (0.8μA), same SC59 package, but bipolar (not omnipolar) operation | Requires precise magnet polarity alignment - increases assembly cost and field failure risk | Select only when strict polarity control is feasible and lowest possible quiescent current is critical |
Compared with A3212LLHLT-T and US5881LUA-ABA-000-RE, the AH1911-W-7 uniquely combines push-pull output, true omnipolar operation, and 1.6μA average current in SC59 - making it optimal for cost-sensitive, space-constrained, battery-powered consumer and industrial sensors where polarity-agnostic mounting and direct logic interfacing are essential.
Availability
AH1911-W-7 is available at Aetrix Electronics and suitable for smart cover detection, utility meter tamper sensing, and smoke detector end-of-life alert systems requiring stable component supply, long-lifecycle support, and RoHS-compliant manufacturing.
Supply support for AH1911-W-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, serving industrial, computing, consumer, and communications markets with high-reliability, energy-efficient components.
The AH1911-W-7 belongs to Diodes' Hall-effect switch product line, engineered specifically for ultra-low-power, battery-operated sensing applications demanding robust magnetic performance, small footprint, and extended operational lifetime.
FAQ
What is the maximum recommended operating voltage for AH1911-W-7?
The absolute maximum supply voltage is 6V, but Diodes specifies functional operation only within 1.6V to 5.5V. Operating above 5.5V risks permanent damage and violates the recommended conditions; sustained use at 6V is prohibited per DS41109 Rev. 1-2 Section 3.
Does AH1911-W-7 require an external pull-up resistor?
No. The AH1911-W-7 features a push-pull output stage capable of actively driving both high and low logic states. Unlike open-drain variants (e.g., AH1921), it does not require an external pull-up resistor - reducing BOM count and PCB area in compact designs.
How does the hibernating clock affect response time?
The hibernating clock wakes the device every ~45ms (typical period) for ~45μs to sample magnetic flux. Response latency is bounded by one full period - up to 80ms worst-case - but ensures 1.6μA average current. For faster response, continuous-mode Hall switches (e.g., AH336Q) are alternatives.
Can AH1911-W-7 be used in automotive applications?
No. AH1911-W-7 is rated for -40°C to +85°C and is not AEC-Q100 qualified. Diodes offers automotive-grade Hall switches (e.g., AH336Q, AH9220) with extended temperature range (-40°C to +150°C) and qualification documentation - AH1911-W-7 is intended for industrial, consumer, and commercial IoT use only.
AH1911-W-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:
- Active
- Function:
- Omnipolar Switch
- Technology:
- Hall Effect
- Polarization:
- North Pole, South Pole
- Sensing Range:
- ±9mT Trip, ±6.7mT Release
- Test Condition:
- -40°C ~ 85°C
- Voltage - Supply:
- 1.6V ~ 5.5V
- Current - Supply (Max):
- 3µA
- 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:
- SC-59-3
AH1911-W-7 FAQ
1.How can I place an order for AH1911-W-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH1911-W-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 AH1911-W-7 reliable?
The price and inventory of AH1911-W-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH1911-W-7 is usually 5 days.
3.What payment methods are accepted for AH1911-W-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH1911-W-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH1911-W-7?
AH1911-W-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH1911-W-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 AH1911-W-7?
For technical support, including AH1911-W-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH1911-W-7 requirements.
6.How does Aetrix verify that AH1911-W-7 is sourced from the original manufacturer or authorized distributors?
All AH1911-W-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 AH1911-W-7 meets industry standards.
7.What is the process for return or replacement of AH1911-W-7?
All AH1911-W-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH1911-W-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 AH1911-W-7 part is unused and in its original packaging.
Return procedure for AH1911-W-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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