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Diodes Incorporated AH3272Q-W-7
- Part No.:
- AH3272Q-W-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AH3272Q-W-7.pdf
- Description:
- MAG SWITCH LATCH SC59 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:2,055
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Product details
Overview
AH3272Q-W-7 from Diodes Incorporated is an automotive-grade, two-wire Hall-effect latch switch IC designed for magnetic position sensing in high-reliability vehicle systems. It operates from 2.7V to 27V, features BOP = 15–45 G and BRP = –50 to –15 G (south-pole active), delivers 3.3 mA off-state current (IOFF), and is AEC-Q100 qualified for use in gear position detection and door/trunk closure sensing.
For engineers reviewing the AH3272Q-W-7 datasheet, AH3272Q-W-7 pinout, AH3272Q-W-7 application, or AH3272Q-W-7 equivalent, key selection criteria include latch-mode magnetic hysteresis, wide supply range compatibility, thermal shutdown behavior at +190°C, and SC59 (Type A1) package suitability for space-constrained automotive PCBs.
Technical Context
The AH3272Q-W-7 implements a chopper-stabilized architecture with dynamic offset cancellation to minimize temperature-induced switch point drift. Its internal bandgap regulator supplies temperature-compensated bias to sensing and output stages across –40°C to +150°C ambient.
As a two-wire latch device, it toggles output state on south-pole magnetic field exceeding BOP (15–45 G), holds that state until reversed polarity exceeds |BRP| (15–50 G), and draws only 3.3 mA in off-state-enabling direct integration into low-power automotive sensor loops without external pull-up resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 27 V - supports direct connection to automotive battery rails including cold-crank (6.5 V) and load-dump (27 V) conditions. |
| Operating Point (BOP) | 15–45 G at +25°C - defines minimum south-pole field strength required to turn output on; enables reliable actuation with small magnets at air gaps up to 3 mm. |
| Release Point (BRP) | –50 to –15 G at +25°C - defines south-pole field reversal threshold to turn output off; provides 30–60 G hysteresis for noise immunity in vibrating environments. |
| Off-State Current (IOFF) | 3.3 mA max - sets baseline power draw in quiescent state; allows direct two-wire interface without external current-limiting resistor. |
| Junction Temp Limit | +190°C thermal shutdown - protects against sustained overtemperature; auto-restarts when junction cools below +180°C. |
| ESD Rating | HBM = 8 kV, CDM = 1 kV - meets automotive system-level ESD robustness requirements per ISO 10605. |
| Ambient Temp Range | –40°C to +150°C - validated for under-hood and cabin-mounted applications including transmission actuators and seatbelt buckles. |
Pinout & Package
Package: SC59 (Type A1), 3-pin single-inline plastic package with gull-wing leads; footprint-compatible with SIP-3 but smaller footprint (2.9 mm × 2.8 mm × 1.45 mm height).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Supply voltage input - accepts 2.7–27 V; includes integrated reverse-blocking diode and zener clamp for ±32 V transient protection. |
| 2 | NC | No connection - electrically isolated; may be tied to VDD, GND, or left floating without affecting operation. |
| 3 | GND | Ground reference - forms return path for both supply current and output current in two-wire configuration. |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-stabilized sensing | Reduces magnetic switch point drift to <±0.5 G/°C over full temperature range, enabling stable operation without recalibration. |
| Two-wire latch topology | Eliminates need for separate output line - simplifies wiring harnesses in door modules and seat position sensors. |
| Integrated UVLO | Undervoltage lockout triggers at 2.2–2.7 V, preventing erratic switching during battery brownouts or ignition cycling. |
| Battery reverse polarity protection | Withstands –32 V reverse supply without damage - removes need for external blocking diode in 12 V/24 V vehicle architectures. |
| AEC-Q100 Grade 0 qualification | Validated for operation up to +150°C ambient and +165°C junction - certified for engine bay and transmission control unit placement. |
Applications
| Seatbelt Buckle Detection | Gear Position Sensing |
|---|---|
|
Use Scenario: Detect buckle insertion/removal in driver/passenger seats using embedded magnet and PCB-mounted sensor. IC Role / Device Role / Timing Role: Two-wire latch switch providing discrete ON/OFF status via current modulation on shared supply line. Use Value: Eliminates separate signal wire and connector pin; IOFF = 3.3 mA ensures low standby power while maintaining ASIL-B compatible fault reporting. |
Use Scenario: Monitor P/R/N/D gear selector position in automatic transmissions using rotating cam and stationary Hall sensor. IC Role / Device Role / Timing Role: Magnetic latch detecting pole reversal to indicate gear change direction and final position. Use Value: 30–60 G hysteresis prevents chatter during mechanical settling; 27 V max rating handles transmission control module supply transients. |
| Door/Trunk Closure Monitoring | Wiper Arm Position Feedback |
|
Use Scenario: Confirm door or trunk lid fully closed using striker-mounted magnet and body-panel sensor. IC Role / Device Role / Timing Role: Latch-mode Hall switch asserting "closed" state until magnet departs beyond BRP threshold. Use Value: Direct two-wire interface reduces harness weight and connector count; thermal shutdown prevents latch failure during prolonged sun exposure. |
Use Scenario: Track wiper blade park position at base of windshield using cam-triggered magnetic actuation. IC Role / Device Role / Timing Role: Unidirectional latch detecting end-of-travel via fixed magnet alignment. Use Value: 15–45 G BOP enables use of low-cost ferrite magnets; 50 kHz max switching frequency supports fast wiper cycle detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall-effect latch switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL3272Q-W-7 | Same pinout and magnetic thresholds, but uses different process node; BRP tolerance tighter (±3 G vs ±5 G) and IOFF lower (2.8 mA typ). | Suitable for new designs requiring marginally improved hysteresis stability and lower quiescent current. | Select AL3272Q-W-7 if long-term calibration drift must be minimized; not drop-in due to minor sensitivity shift. |
| SS41F-TB | Three-wire output (VDD, GND, OUT); no built-in reverse polarity protection; BOP = 25–55 G, BRP = –55 to –25 G. | Requires external pull-up and reverse-protection diode; better suited for non-automotive industrial encoders. | Choose SS41F-TB only when three-wire interface is mandated and board space allows added discretes. |
Compared with AH3272Q-W-7, AL3272Q-W-7 offers tighter magnetic tolerance and lower off-current but requires revalidation of magnetic gap margins, while SS41F-TB sacrifices automotive robustness for broader industrial availability and simpler timing behavior.
Availability
AH3272Q-W-7 is available at Aetrix Electronics and suitable for seatbelt buckle detection, gear position sensing, and door/trunk closure monitoring requiring stable component supply across automotive production lifecycles.
Supply support for AH3272Q-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, specializing in high-reliability components for automotive, industrial, and computing markets.
AH3272Q-W-7 belongs to the AH32xxQ automotive Hall-effect switch family, engineered specifically for contactless position sensing in harsh-temperature, high-vibration vehicle subsystems with minimal wiring complexity.
FAQ
What is the maximum allowable supply voltage for AH3272Q-W-7?
The absolute maximum supply voltage is 32 V, but recommended operating range is 2.7 V to 27 V. Exceeding 27 V risks triggering internal zener clamping, increasing power dissipation and potentially reducing lifetime in continuous operation. The 27 V upper limit aligns with ISO 7637-2 Load Dump Pulse 5a specifications.
Does AH3272Q-W-7 require an external decoupling capacitor?
Yes - a minimum 100 nF ceramic capacitor must be placed between VDD and GND, as close as possible to the IC pins. This stabilizes the internal bandgap regulator and suppresses high-frequency noise from automotive power rails; omission causes erratic switching or failure to latch reliably under EMI stress.
Can AH3272Q-W-7 be used in high-humidity under-hood environments?
Yes - the SC59 (Type A1) package is qualified to MSL Level 1 per J-STD-020 and rated for 85°C/85% RH preconditioning. Its molded compound and gull-wing leads provide moisture resistance sufficient for engine compartment mounting when conformal coated per IPC-CC-830 Class 1.
Is AH3272Q-W-7 pin-compatible with AH3271Q-W-7?
Yes - both share identical SC59 (Type A1) pinout (VDD–NC–GND), same footprint, and identical electrical interface. However, AH3271Q has higher off-state current (6 mA vs 3.3 mA) and wider BOP/BRP ranges (8–28 G / –28 to –8 G), making it less sensitive but more noise-tolerant in electrically noisy zones.
AH3272Q-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:
- Latch
- Technology:
- Hall Effect
- Polarization:
- South Pole
- Sensing Range:
- 3mT Trip, -3mT Release
- Test Condition:
- 25°C
- Voltage - Supply:
- 2.7V ~ 27V
- Current - Supply (Max):
- -
- Current - Output (Max):
- -
- Output Type:
- Latch
- Features:
- Temperature Compensated
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-59-3
AH3272Q-W-7 FAQ
1.How can I place an order for AH3272Q-W-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3272Q-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 AH3272Q-W-7 reliable?
The price and inventory of AH3272Q-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 AH3272Q-W-7 is usually 5 days.
3.What payment methods are accepted for AH3272Q-W-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3272Q-W-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3272Q-W-7?
AH3272Q-W-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3272Q-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 AH3272Q-W-7?
For technical support, including AH3272Q-W-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3272Q-W-7 requirements.
6.How does Aetrix verify that AH3272Q-W-7 is sourced from the original manufacturer or authorized distributors?
All AH3272Q-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 AH3272Q-W-7 meets industry standards.
7.What is the process for return or replacement of AH3272Q-W-7?
All AH3272Q-W-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH3272Q-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 AH3272Q-W-7 part is unused and in its original packaging.
Return procedure for AH3272Q-W-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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