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Home > Products > Sensors, Transducers > Magnetic Sensors > Switches (Solid State)

Diodes Incorporated AH1714-SA-7

Name: AH1714-SA-7
Brand: Diodes Incorporated
SKU: AH1714-SA-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AH1714-SA-7

Manufacturer:: Diodes Incorporated

Category:: Switches (Solid State)

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: AH1714-SA-7.pdf

Description:: HALL LATCH SWITCH SOT23 T&R 3K

Quantity:: RFQ Add To RFQ list

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Inventory:2,970

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Product details

Overview

AH1714-SA-7 from Diodes Incorporated is a low-voltage, high-sensitivity Hall effect latch switch with inverted magnetic polarity, designed for brushless DC motor commutation and angular position sensing in industrial and e-bike systems. It operates from 2.4V to 5.5V, features ±18 Gauss release point (Brp), ±37 Gauss operate point (Bop), open-drain output, and chopper-stabilized architecture for stable switching across −40°C to +125°C.

For engineers reviewing the AH1714-SA-7 datasheet, AH1714-SA-7 pinout, AH1714-SA-7 application, or AH1714-SA-7 equivalent, this device is selected for precise latching response in RPM measurement, wheel speed sensing, and flow metering where magnetic polarity inversion and thermal stability are critical design requirements.

Technical Context

The AH1714-SA-7 implements a chopper-stabilized Hall sensor with dynamic offset cancellation and internal bandgap-regulated supply, enabling minimal switch-point drift (<±14 Gauss Bop variation over temperature) and superior immunity to mechanical stress and RF noise. Its inverted polarity logic means South pole triggers output turn-off and North pole triggers turn-on - opposite to AH1711–AH1713.

Functional operation relies on magnetic flux density perpendicular to the SOT23 package top surface. Latching behavior requires B > Bop (e.g., +37 G typ.) to pull output low, and B < Brp (e.g., −37 G typ.) to release and hold high via external pull-up. Startup time is 38 µs typical at VDD ≥ 2.4V.

Key Specifications

Parameter	Value and Actual Design Meaning
Operating Voltage	2.4V to 5.5V - supports direct interface with 3.3V and 5V microcontrollers without level-shifting
Operate Point (Bop)	±5 to ±37 Gauss - enables reliable activation under weak or variable magnetic fields in compact encoders
Release Point (Brp)	±5 to ±37 Gauss - provides 23–36 Gauss hysteresis to prevent chatter near threshold in noisy environments
Output Type	Open-drain - allows flexible pull-up voltage selection (up to 6V) and wired-OR configuration with other sensors
Supply Current	2.0–3.2 mA - ultra-low quiescent draw suitable for battery-powered e-bike controllers and portable meters
Response Time	10–20 µs - supports accurate RPM capture up to ~50 kHz (e.g., 3M RPM at 1-pole pair)
ESD Rating	HBM 8 kV / CDM 2 kV - robust enough for manual handling and industrial assembly without additional protection

Pinout & Package

Package: SOT23 - surface-mount, 3-pin, JEDEC-standard footprint (2.9 mm × 1.3 mm × 1.0 mm), RoHS-compliant, halogen-free, and qualified for reflow per J-STD-020 Level 1.

Pin/Terminal	Circuit Role	Design Meaning
1	VDD	Power supply input - must be decoupled with 10–100 nF capacitor to suppress noise-induced false triggering
2	OUTPUT	Open-drain output - sinks up to 20 mA; requires external pull-up resistor (typically 1–10 kΩ) to define logic-high level
3	GND	Ground reference - shared return path for supply and output current; layout must minimize impedance to avoid offset errors

Key Features

Feature	Design Value
Inverted Polarity Logic	North pole activates output (pulls low); South pole releases - simplifies mechanical integration where magnet orientation is constrained
Chopper-Stabilized Architecture	Reduces thermal drift of Bop/Brp to <±0.15 G/°C - ensures consistent switching thresholds across automotive and industrial temperature ranges
Temperature Range	−40°C to +125°C - validated for under-hood e-bike motor controllers and factory-floor encoder modules
RF Noise Immunity	Immune to common 100 MHz–1 GHz interference - eliminates need for shielding in motor-drive proximity applications
Low Power-On Time	38 µs typical startup delay - enables rapid system wake-up in duty-cycled sensing nodes

Applications

Brushless DC Motor Commutation

RPM & Wheel Speed Sensing

Use Scenario: Detect rotor position in 3-phase BLDC motors for electronic commutation timing.

IC Role / Device Role / Timing Role: Hall latch providing synchronized edge-triggered signals to MCU timer inputs for phase sequencing.

Use Value: Inverted polarity allows direct mounting opposite standard magnet arrays without mechanical reorientation, reducing BOM and assembly cost.

Use Scenario: Measure rotational speed of bicycle wheels or industrial conveyor shafts using embedded magnets.

IC Role / Device Role / Timing Role: Magnetic zero-crossing detector feeding pulse train to microcontroller counter peripherals.

Use Value: 20 µs max response time supports accurate RPM calculation up to 50,000 RPM with single-magnet targets.

Flow Meter Angular Position

E-Bike Pedal Assist Sensing

Use Scenario: Monitor turbine or impeller rotation in liquid/gas flow meters to derive volumetric flow rate.

IC Role / Device Role / Timing Role: Latching position sensor capturing discrete angular events per revolution for pulse-based flow computation.

Use Value: ±37 G Bop tolerance accommodates magnet strength variation across production batches, ensuring calibration-free field deployment.

Use Scenario: Detect crank rotation direction and cadence in pedal-assist e-bike systems.

IC Role / Device Role / Timing Role: Direction-sensitive latch interfacing with MCU GPIO to enable torque-proportional motor assist.

Use Value: Inverted polarity aligns with common magnet placement on chainrings, eliminating signal inversion firmware or external logic.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Hall latch applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AL33033EUA-7	Unipolar latch (no hysteresis spec), 3.0–24V supply, TO92 package	Lacks guaranteed hysteresis and chopper stabilization - higher temperature drift and lower noise immunity	Select only for cost-sensitive, non-automotive applications with stable ambient temperature and strong magnetic fields
US1881EUA-7	Bipolar latch, 3.5–24V, 50 G Bop, SOT23, but non-inverted polarity	Requires magnet reorientation or firmware polarity inversion to match AH1714 functional behavior	Choose when existing designs use AH1711/AH1712 and require same polarity logic - not drop-in for AH1714's inverted mode

Compared with AL33033EUA-7 and US1881EUA-7, the AH1714-SA-7 uniquely delivers inverted polarity, chopper-stabilized precision, and guaranteed hysteresis within a 2.4–5.5V supply range - making it the only option among the three qualified for low-voltage, thermally demanding e-bike and industrial encoder use cases.

Availability

AH1714-SA-7 is available at Aetrix Electronics and suitable for brushless DC motor control, wheel speed sensing, and flow metering requiring stable component supply, long-term lifecycle support, and AEC-Q200-aligned reliability.

Supply support for AH1714-SA-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 semiconductor company specializing in discrete, analog, and mixed-signal solutions, with manufacturing certified to IATF 16949 and products compliant with AEC-Q100/101/200 standards.

The AH171x series belongs to Diodes' high-reliability Hall-effect sensor product line, engineered specifically for industrial motion control and automotive-adjacent applications demanding wide temperature operation and magnetic consistency.

FAQ

What is the magnetic polarity behavior of AH1714-SA-7?

The AH1714-SA-7 exhibits inverted polarity: a North pole applied to the top of the package turns the output ON (low), while a South pole turns it OFF (high). This differs from AH1711–AH1713 and is confirmed in the magnetic characteristics table (Bop/Brp signs) and functional block diagram notes. No external inversion circuitry is needed.

Can AH1714-SA-7 operate reliably at 2.4V supply?

Yes - the device is fully specified down to 2.4V, with tested parameters including Bop/Brp, supply current (2.0–2.8 mA typ.), and startup time (38 µs typ.). At 2.4V, output sinking capability remains 20 mA, and VOL stays ≤0.4 V, enabling direct interface with 2.5V/3.3V logic families.

Is an input capacitor required for stable operation?

A 10–100 nF ceramic capacitor (CIN) between VDD and GND is recommended per the Typical Applications Circuit. It stabilizes the internal bandgap regulator, suppresses power-rail noise, and prevents false triggering during ESD or motor-switching transients - omission may cause erratic latching in electrically noisy environments.

Does AH1714-SA-7 support AEC-Q200 qualification?

The AH1714-SA-7 is not individually AEC-Q200 qualified; however, Diodes states that automotive-grade versions meeting AEC-Q200 are available upon request and manufactured in IATF 16949-certified facilities. Standard AH1714-SA-7 is rated for −40°C to +125°C and used in automotive-adjacent applications like e-bikes, but formal PPAP or change-control documentation requires special ordering.

AH1714-SA-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:: Latch

Technology:: Hall Effect

Polarization:: North Pole, South Pole

Sensing Range:: 3.7mT Trip, -3.7mT Release

Test Condition:: -40°C ~ 125°C

Voltage - Supply:: 2.4V ~ 5.5V

Current - Supply (Max):: 3.2mA

Current - Output (Max):: 60mA

Output Type:: Open Drain

Features:: Temperature Compensated

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

AH1714-SA-7 FAQ

1.How can I place an order for AH1714-SA-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AH1714-SA-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 AH1714-SA-7 reliable?

The price and inventory of AH1714-SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH1714-SA-7 is usually 5 days.

3.What payment methods are accepted for AH1714-SA-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH1714-SA-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AH1714-SA-7?

AH1714-SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AH1714-SA-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 AH1714-SA-7?

For technical support, including AH1714-SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH1714-SA-7 requirements.

6.How does Aetrix verify that AH1714-SA-7 is sourced from the original manufacturer or authorized distributors?

All AH1714-SA-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 AH1714-SA-7 meets industry standards.

7.What is the process for return or replacement of AH1714-SA-7?

All AH1714-SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH1714-SA-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 AH1714-SA-7 part is unused and in its original packaging.

Return procedure for AH1714-SA-7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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