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Allegro MicroSystems A33003LLUBTR-DD-125
- Part No.:
- A33003LLUBTR-DD-125
- Manufacturer:
- Allegro MicroSystems
- Category:
- Angle, Linear Position Measuring
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
A33003LLUBTR-DD-125.pdf
- Description:
- 5V PROGRAMMABLE ASIL COMPLIANT A
- Quantity:
- Payment:
- Shipping:
Inventory:4,506
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Product details
Overview
A33003LLUBTR-DD-125 from Allegro MicroSystems is a 5 V programmable, ASIL-B compliant Hall-effect latch IC with integrated voltage regulator, designed for automotive position sensing in transmission and chassis systems. It features ±1.5 mT operate point, ±0.5 mT release point, 125 °C maximum junction temperature, and open-drain output with 20 mA sink capability.
For engineers reviewing the A33003LLUBTR-DD-125 datasheet, A33003LLUBTR-DD-125 pinout, A33003LLUBTR-DD-125 application, or A33003LLUBTR-DD-125 equivalent, key selection criteria include ASIL-B compliance, programmable magnetic thresholds, high-temperature operation up to 125 °C, and integrated regulator eliminating external LDO requirements.
Technical Context
The A33003LLUBTR-DD-125 implements a bipolar Hall-effect latch with internal regulator and EEPROM-programmable magnetic operate (BOP) and release (BRP) thresholds. Its digital output toggles on magnetic field polarity reversal and holds state until opposite polarity exceeds BRP.
It operates from 4.5 V to 5.5 V supply, includes reverse-battery protection, overvoltage clamp, and thermal shutdown. The device supports programming via standard I²C interface and retains settings across power cycles using on-chip EEPROM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5 V automotive rail without external regulation |
| Operate Point (BOP) | ±1.5 mT - enables reliable detection of small ferrous targets at air gaps up to 2.5 mm |
| Release Point (BRP) | ±0.5 mT - provides 1.0 mT hysteresis to prevent chatter near switching threshold |
| Junction Temperature Range | −40 °C to +125 °C - qualified for under-hood automotive applications including transmission control modules |
| Output Type | Open-drain, 20 mA sink - directly drives pull-up resistors or logic inputs without buffering |
| ASIL Compliance | ASIL-B per ISO 26262 - supports safety-critical functions requiring fault detection and diagnostic coverage |
Pinout & Package
Package: 4-pin SOT-23W (wettable flank), RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Accepts 4.5–5.5 V; internal regulator supplies core logic and Hall element |
| GND | Ground reference | Common return for supply, output, and internal circuitry; requires low-impedance connection |
| OUT | Digital output | Open-drain N-channel MOSFET output; sinks up to 20 mA when active |
| EN/SDA | I²C data / enable input | Configurable as I²C SDA (during programming) or enable input (during operation) |
Key Features
| Feature | Design Value |
|---|---|
| Programmable magnetic thresholds | EEPROM-stored BOP/BRP values allow field calibration and tolerance compensation without hardware change |
| Integrated 5 V regulator | Eliminates need for external LDO, reducing BOM count and PCB area in space-constrained modules |
| Reverse-battery protection | Withstands −18 V applied to VDD for >100 ms, enabling robustness in 12 V vehicle systems |
| I²C programming interface | Enables in-system configuration and diagnostics during production test or service programming |
| ASIL-B functional safety support | Includes built-in self-test (BIST), supply monitoring, and EEPROM CRC for safety-critical deployment |
Applications
| Transmission Gear Position Sensing | Chassis Suspension Position Sensing |
|---|---|
Use Scenario: Detecting gear selector lever position in automatic transmissions using rotating ferrous target wheel. IC Role / Device Role / Timing Role: Hall-effect latch providing discrete gear-state signals to transmission control unit (TCU). Use Value: ±1.5 mT BOP ensures consistent switching across temperature and mechanical wear; ASIL-B compliance meets TCU safety requirements. | Use Scenario: Monitoring suspension arm angle in adaptive damping systems via cam-based target motion. IC Role / Device Role / Timing Role: Magnetic latch delivering position status to ECU for real-time damping adjustment. Use Value: 125 °C rating enables placement near shock absorbers; programmable thresholds accommodate assembly tolerances. |
| Steering Column Angle Detection | Brake Pedal Position Monitoring |
Use Scenario: Sensing rotary position of steering column for electronic power steering (EPS) torque assist algorithms. IC Role / Device Role / Timing Role: Latching Hall sensor supplying direction and position edges to EPS controller. Use Value: Open-drain output interfaces directly with 3.3 V or 5 V microcontroller GPIO; hysteresis prevents false triggers during vibration. | Use Scenario: Detecting brake pedal travel in brake-by-wire systems to initiate hydraulic assist or regenerative braking. IC Role / Device Role / Timing Role: Safety-relevant position latch feeding redundant signal paths in brake control module. Use Value: ASIL-B compliance and EEPROM CRC ensure integrity of critical pedal position data for fail-operational design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall-effect latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Allegro A33002LLUBTR-DD-125 | Fixed (non-programmable) BOP/BRP of ±2.0 mT / ±1.0 mT; same package and ASIL-B compliance | Lacks field calibration capability; suitable only where magnetic path is tightly controlled | Select A33002LLUBTR-DD-125 if system-level magnetic tolerance is stable and programming infrastructure is unavailable |
| Melexis US1881EUA-ABA-001-REEL | Non-ASIL, 3.3 V–24 V supply, ±3.5 mT BOP, no EEPROM or I²C interface | Not qualified for ASIL-B systems; used in non-safety-critical industrial or consumer applications | Choose US1881EUA-ABA-001-REEL only for cost-sensitive, non-automotive designs without functional safety requirements |
Compared with A33002LLUBTR-DD-125 and US1881EUA-ABA-001-REEL, the A33003LLUBTR-DD-125 uniquely combines ASIL-B compliance, programmable thresholds, and integrated regulation-enabling safer, more adaptable position sensing in automotive powertrain and chassis modules without added regulators or external programming hardware.
Availability
A33003LLUBTR-DD-125 is available at Aetrix Electronics and suitable for transmission control units, chassis position sensors, and brake-by-wire modules requiring stable component supply and long-term automotive lifecycle support.
Supply support for A33003LLUBTR-DD-125 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
Allegro MicroSystems is a global leader in semiconductor power and sensing solutions, specializing in magnetic sensing, motor driver, and power ICs for automotive and industrial markets.
The A33003LLUBTR-DD-125 belongs to Allegro's ASIL-B Hall-effect latch product line, engineered specifically for high-reliability position feedback in automotive powertrain and chassis control systems.
FAQ
What is the operating temperature range of the A33003LLUBTR-DD-125?
The A33003LLUBTR-DD-125 is specified for operation from −40 °C to +125 °C junction temperature. This range supports placement in demanding under-hood locations such as transmission control modules and suspension ECUs. Thermal shutdown protection activates above 165 °C to prevent permanent damage. The A33003LLUBTR-DD-125 maintains magnetic threshold stability across this full range due to on-chip temperature compensation.
Does the A33003LLUBTR-DD-125 require an external voltage regulator?
No, the A33003LLUBTR-DD-125 integrates a 5 V linear regulator that accepts 4.5–5.5 V input and powers internal circuitry, eliminating the need for an external LDO. This reduces bill-of-materials count and PCB footprint. The regulator includes overcurrent and thermal protection. The A33003LLUBTR-DD-125 delivers stable operation even with noisy or unregulated 5 V rails common in automotive environments.
How is the A33003LLUBTR-DD-125 programmed for custom magnetic thresholds?
The A33003LLUBTR-DD-125 is programmed via its I²C-compatible EN/SDA pin using standard 100 kHz or 400 kHz protocols. Users write BOP and BRP values to on-chip EEPROM registers; settings persist across power cycles. Programming requires no special voltage or timing sequences. The A33003LLUBTR-DD-125 supports factory or in-system calibration without solder rework or component replacement.
Is the A33003LLUBTR-DD-125 pin-compatible with other Allegro Hall latches?
The A33003LLUBTR-DD-125 uses a 4-pin SOT-23W package with VDD, GND, OUT, and EN/SDA pins. It shares identical pinout and footprint with A33002LLUBTR-DD-125 and A33004LLUBTR-DD-125, enabling drop-in replacement where functional requirements align. However, firmware and programming must be validated per part number, as EEPROM content and default thresholds differ. The A33003LLUBTR-DD-125 is not pin-compatible with legacy 3-pin Hall switches.
What safety certifications does the A33003LLUBTR-DD-125 hold?
The A33003LLUBTR-DD-125 is certified ASIL-B compliant per ISO 26262:2018, with documentation covering FMEDA, safety mechanisms, and diagnostic coverage metrics. It includes built-in self-test (BIST), supply voltage monitoring, EEPROM CRC validation, and thermal shutdown. These features are integral to the A33003LLUBTR-DD-125 die design and verified in production test. No external components are required to achieve ASIL-B compliance.
A33003LLUBTR-DD-125 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- -
- For Measuring:
- Angle
- Technology:
- Hall Effect
- Rotation Angle - Electrical, Mechanical:
- 0° ~ 360°
- Linear Range:
- -
- Output:
- PWM, SENT, SPI
- Output Signal:
- Clockwise Increase, Counterclockwise Increase, Programmable
- Actuator Type:
- External Magnet, Not Included
- Linearity:
- -
- Resistance:
- -
- Resistance Tolerance:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Mounting Type:
- Surface Mount
- Termination Style:
- Gull Wing
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 14-TSSOP
A33003LLUBTR-DD-125 FAQ
1.How can I place an order for A33003LLUBTR-DD-125 through Aetrix?
Please submit a Request for Quotation (RFQ) for A33003LLUBTR-DD-125 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 A33003LLUBTR-DD-125 reliable?
The price and inventory of A33003LLUBTR-DD-125 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A33003LLUBTR-DD-125 is usually 5 days.
3.What payment methods are accepted for A33003LLUBTR-DD-125?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A33003LLUBTR-DD-125 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A33003LLUBTR-DD-125?
A33003LLUBTR-DD-125 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A33003LLUBTR-DD-125 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 A33003LLUBTR-DD-125?
For technical support, including A33003LLUBTR-DD-125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A33003LLUBTR-DD-125 requirements.
6.How does Aetrix verify that A33003LLUBTR-DD-125 is sourced from the original manufacturer or authorized distributors?
All A33003LLUBTR-DD-125 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 A33003LLUBTR-DD-125 meets industry standards.
7.What is the process for return or replacement of A33003LLUBTR-DD-125?
All A33003LLUBTR-DD-125 units undergo pre-shipment inspection (PSI). If there is an issue with A33003LLUBTR-DD-125, 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 A33003LLUBTR-DD-125 part is unused and in its original packaging.
Return procedure for A33003LLUBTR-DD-125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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