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Allegro MicroSystems A19302PUBATN-RAE-A
- Part No.:
- A19302PUBATN-RAE-A
- Manufacturer:
- Allegro MicroSystems
- Category:
- Angle, Linear Position Measuring
- Package:
- 2-SIP Module
- Datasheet:
-
A19302PUBATN-RAE-A.pdf
- Description:
- 2-WIRE ABS DIRECTION AND SPEED S
- Quantity:
- Payment:
- Shipping:
Inventory:1,062
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Product details
Overview
A19302PUBATN-RAE-A from Allegro MicroSystems is a Hall-effect wheel speed and direction sensor IC in a 2-pin SIP (UB) package, supporting AK protocol output with ASIL B safety compliance per ISO 26262. It delivers high-accuracy rotational speed and direction detection for automotive wheel applications, featuring integrated 2.2 nF ceramic capacitor, SolidSpeed Digital Architecture, and EEPROM-based traceability across the product lifecycle.
For engineers reviewing the A19302PUBATN-RAE-A datasheet, A19302PUBATN-RAE-A pinout, A19302PUBATN-RAE-A application, or A19302PUBATN-RAE-A equivalent, this page provides verified technical context, real-world functional behavior under dynamic air gap disturbances, ASIL B fault signaling, magnetic temperature compensation for ferrite/neodymium magnets, and validated performance up to 2.5 kHz operating frequency with ±40 °C to +160 °C ambient operation.
Technical Context
The A19302PUBATN-RAE-A implements a three-element Hall sensor array configured in differential pairs (E1–E2, E2–E3) to reject common-mode noise and enable precise edge detection for direction resolution. Its SolidSpeed Digital Architecture executes real-time signal optimization, including dynamic threshold setting, amplitude ratio monitoring over rolling 4-cycle windows (TWINDOW), and automatic calibration at power-on to validate rotation direction within ≤1.5 TCYCLE.
This variant uses the AK protocol (-xAx suffix), delivering 10-pulse words containing speed pulses, 8 data bits (air gap reserve, overtemperature, direction validity, forward/reverse flag, 3-bit LM air gap indication), and parity - all compliant with AK Protocol v4.0 with documented modifications. The -RAE-A suffix confirms reverse-direction configuration (pin 2 → pin 1 = forward), ASIL protocol enabled, and ferrite/neodymium magnet support (E variant).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Protocol | AK protocol (-xAx): 10-pulse word with speed pulse, 8 data bits, and parity - enables diagnostic reporting of air gap, overtemperature, and direction validity. |
| Operating Frequency | 0–2.5 kHz: Supports full-speed ABS/ESC operation without missed transitions or flat-line conditions under specified magnetic input variation. |
| Supply Voltage Range | 5.2 V to 24 V: Compatible with 12 V automotive battery systems including cold-crank and load-dump transients. |
| Differential Magnetic Input | ±700 G operating range, 20 G peak-to-peak minimum: Ensures reliable switching with ring magnets or back-biased ferromagnetic targets. |
| ASIL Safety Current | 1.5–3.8 mA fault-state output: Provides deterministic safe-state signaling upon internal defect detection per ISO 26262 SEooC requirements. |
| Thermal Resistance | RθJA = 213 °C/W: Enables thermal design validation on single-layer PCBs with limited copper; junction temperature must stay ≤175 °C. |
| Ambient Temperature | –40 °C to +160 °C: Qualified for under-hood wheel speed sensing in passenger and commercial vehicles. |
| Integrated Capacitor | 2.2 nF ceramic capacitor: Embedded in UB package to suppress supply noise and improve EMC robustness without external components. |
Pinout & Package
The A19302PUBATN-RAE-A is housed in a lead-free, tin-plated 2-pin SIP (UB) package measuring 18.00 mm × 4.00 mm × 1.80 mm, with molded lead-stabilizing bar for mechanical robustness during shipping and SMT assembly. The overmolded construction integrates the Hall IC die and high-temperature ceramic capacitor in a single unit.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply Voltage | Pin 1 accepts 5.2–24 V DC input; includes UVLO hysteresis (1.1 V) and zener clamp (28 V) for transient protection. |
| GND | Ground | Pin 2 serves as return path; output current (ICC(LOW)/ICC(MID)/ICC(HIGH)) flows through this terminal to generate protocol-encoded pulses. |
Key Features
| Feature | Design Value |
|---|---|
| SolidSpeed Digital Architecture | Enables real-time amplitude ratio monitoring (∆BDIFF(pk-pk) ≤ 0.4 over TWINDOW = 4 cycles) to maintain pitch accuracy during dynamic air gap disturbances. |
| ASIL B SEooC Compliance | Hardware safety element developed per ISO 26262 with documented fault detection logic, safe-state output (IFAULT = 1.5–3.8 mA), and safety manual integration guidance. |
| Integrated 2.2 nF Capacitor | Eliminates need for external decoupling, reduces board space, and improves EMC immunity in noisy automotive environments. |
| EEPROM Traceability | Stores unique device identifiers and calibration data for full-lifecycle tracking - critical for OEM traceability and recall management. |
| Magnetic Temperature Compensation | 0.16 %/°C coefficient for ferrite/neodymium magnets (-E variant), ensuring stable air gap performance across –40 °C to +160 °C ambient. |
| Reverse Rotation Configuration | –R prefix indicates pin 2 → pin 1 motion defined as forward rotation - matches mechanical mounting orientation in specific wheel hub assemblies. |
Applications
| Anti-lock Braking System (ABS) | Electronic Stability Control (ESC) |
|---|---|
Use Scenario: Mounted on wheel hub to monitor rotational speed and direction during emergency braking on low-friction surfaces. IC Role / Device Role / Timing Role: Primary wheel speed sensor providing real-time direction-resolved pulse train to ABS ECU for individual wheel slip control. Use Value: Enables accurate wheel lock detection and directional slip correction using AK protocol's DR bit and air gap reserve (LR) flag to maintain reliability despite brake dust accumulation or thermal drift. | Use Scenario: Integrated into vehicle dynamics control module to detect yaw rate discrepancies between driven and non-driven wheels during cornering. IC Role / Device Role / Timing Role: Direction-aware speed sensor feeding ESC controller with synchronized multi-wheel data for torque vectoring decisions. Use Value: Delivers validated direction information (GDR bit) and overtemperature status (OT bit) to prevent false interventions during sustained high-G maneuvers or hot brake rotor exposure. |
| Transmission Speed Sensing | Electric Power Steering (EPS) Motor Position |
Use Scenario: Installed on transmission output shaft to monitor gear engagement timing and detect neutral-to-drive shifts. IC Role / Device Role / Timing Role: High-resolution speed and direction sensor enabling closed-loop transmission control via pulse period ratio (PR = 40–60%) analysis. Use Value: Uses calibrated period ratio to distinguish between gear teeth and notches, reducing shift hesitation and improving shift quality under varying load and temperature. | Use Scenario: Positioned on EPS motor rotor to provide commutation feedback and assist torque estimation during steering maneuvers. IC Role / Device Role / Timing Role: Robust direction-sensing element tolerant of magnetic field distortion from nearby high-current motor windings. Use Value: Maintains valid direction output (GDR = 1) even during vibration events due to SolidSpeed architecture's dynamic threshold adaptation and 15 °C overtemperature hysteresis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall-effect wheel speed and direction sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| A19302PUBATN-FAE-A | Forward rotation configuration (pin 1 → pin 2 = forward); identical AK protocol, ASIL B, and electrical specs. | Requires reversed mechanical mounting orientation relative to target motion direction. | Select when wheel hub geometry mandates pin 1-to-pin 2 forward motion alignment. |
| ATS6858LSGT-T | Two-wire GMR-based sensor with SENT output; no integrated capacitor; RθJA = 190 °C/W; operates to 175 °C junction. | Lacks ASIL B SEooC documentation and EEPROM traceability; requires external RC filter for EMC. | Choose for cost-sensitive non-safety-critical applications where GMR sensitivity offsets lower air gap tolerance. |
Compared with A19302PUBATN-RAE-A, the -FAE-A variant offers identical safety and performance but reversed rotation mapping, while the ATS6858LSGT-T trades ASIL B compliance and embedded capacitance for higher magnetic sensitivity and SENT interface flexibility - requiring separate safety case development and layout-level EMC mitigation.
Availability
A19302PUBATN-RAE-A is available at Aetrix Electronics and suitable for automotive ABS, ESC, transmission control, and EPS motor position sensing requiring stable component supply, long-term lifecycle continuity, and ISO 26262-compliant traceability.
Supply support for A19302PUBATN-RAE-A 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 U.S.-based designer and manufacturer of high-performance magnetic sensing and power IC solutions, headquartered in Manchester, NH.
The A19302 product line was developed specifically for automotive wheel speed and direction sensing in safety-critical systems, combining Hall-effect precision with ASIL B hardware safety integrity and robust packaging for harsh under-hood environments.
FAQ
What does the "R" in A19302PUBATN-RAE-A signify?
The "R" denotes reverse rotation configuration: forward rotation is defined as target motion from pin 2 to pin 1. This matches mechanical mounting in specific wheel hub assemblies where the branded face faces inward. The A19302PUBATN-RAE-A maintains identical electrical, thermal, and protocol specifications as forward-configured variants - only the direction interpretation logic differs.
Does A19302PUBATN-RAE-A support both PW and AK protocols?
No - the "A" in the suffix (-RAE-A) confirms AK protocol support only. PW protocol is enabled by "P" (e.g., -PUBATN-RPE-A). The A19302PUBATN-RAE-A outputs 10-pulse AK words with speed pulse, 8 data bits (including air gap reserve, direction, and overtemperature flags), and parity - fully compliant with AK Protocol v4.0 with documented modifications per the datasheet.
How does the integrated 2.2 nF capacitor in A19302PUBATN-RAE-A improve system design?
The embedded 2.2 nF ceramic capacitor eliminates the need for an external decoupling capacitor, reducing PCB area, BOM count, and assembly steps. It is co-located with the IC die inside the overmolded UB package, minimizing parasitic inductance and enhancing high-frequency noise rejection - directly improving EMC robustness in electrically noisy automotive environments without layout-dependent tuning.
What is the meaning of "ASIL B SEooC" for A19302PUBATN-RAE-A?
ASIL B SEooC (Safety Element out of Context) means the A19302PUBATN-RAE-A was developed per ISO 26262 Part 5 with documented fault coverage, failure modes, and safe-state behavior (IFAULT = 1.5–3.8 mA), but requires integration per the safety manual to achieve full ASIL B compliance in the final system. It is not a standalone safety subsystem - its safety claim depends on correct usage, diagnostics, and system-level validation.
Can A19302PUBATN-RAE-A operate reliably at 160 °C ambient temperature?
Yes - the A19302PUBATN-RAE-A is qualified for –40 °C to +160 °C ambient operation. At TA = 160 °C, thermal derating must be applied: with RθJA = 213 °C/W and TJ(max) = 175 °C, maximum allowable power dissipation drops to ~117 mW. For typical ICC(MID) = 14 mA, this limits VCC to ~8.4 V - confirming viability in high-temp zones when voltage and current are managed per the power derating curve.
A19302PUBATN-RAE-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Package/Case:
- 2-SIP Module
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- -
- For Measuring:
- -
- Technology:
- Hall Effect
- Rotation Angle - Electrical, Mechanical:
- -
- Linear Range:
- -
- Output:
- Analog Voltage
- Output Signal:
- -
- Actuator Type:
- External Magnet, Not Included
- Linearity:
- -
- Resistance:
- -
- Resistance Tolerance:
- -
- Voltage - Supply:
- 5.2V ~ 24V
- Mounting Type:
- Through Hole
- Termination Style:
- PC Pin
- Operating Temperature:
- -40°C ~ 160°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 2-UltraMini SIP
A19302PUBATN-RAE-A FAQ
1.How can I place an order for A19302PUBATN-RAE-A through Aetrix?
Please submit a Request for Quotation (RFQ) for A19302PUBATN-RAE-A 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 A19302PUBATN-RAE-A reliable?
The price and inventory of A19302PUBATN-RAE-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A19302PUBATN-RAE-A is usually 5 days.
3.What payment methods are accepted for A19302PUBATN-RAE-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A19302PUBATN-RAE-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A19302PUBATN-RAE-A?
A19302PUBATN-RAE-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A19302PUBATN-RAE-A 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 A19302PUBATN-RAE-A?
For technical support, including A19302PUBATN-RAE-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A19302PUBATN-RAE-A requirements.
6.How does Aetrix verify that A19302PUBATN-RAE-A is sourced from the original manufacturer or authorized distributors?
All A19302PUBATN-RAE-A 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 A19302PUBATN-RAE-A meets industry standards.
7.What is the process for return or replacement of A19302PUBATN-RAE-A?
All A19302PUBATN-RAE-A units undergo pre-shipment inspection (PSI). If there is an issue with A19302PUBATN-RAE-A, 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 A19302PUBATN-RAE-A part is unused and in its original packaging.
Return procedure for A19302PUBATN-RAE-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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