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Allegro MicroSystems A19520LUBBTN-FSNHPYUE-A
- Part No.:
- A19520LUBBTN-FSNHPYUE-A
- Manufacturer:
- Allegro MicroSystems
- Package:
- 2-SIP Module
- Datasheet:
-
A19520LUBBTN-FSNHPYUE-A.pdf
- Description:
- 2-WIRE ASIL COMPLIANT TRANSMISSI
- Quantity:
- Payment:
- Shipping:
Inventory:4,884
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Product details
Overview
A19520LUBBTN-FSNHPYUE-A from Allegro MicroSystems is a vibration-tolerant, ASIL B–compliant Hall-effect speed and direction sensor IC for automotive transmission systems. It features differential sensing of ring magnets or back-biased ferrous targets, integrated 10 nF EMC capacitor, two-wire current-source output with pulse-width protocol, and operates from −40 °C to +150 °C. Designed for direct integration into gear-position and shaft-speed monitoring circuits.
For engineers reviewing the A19520LUBBTN-FSNHPYUE-A datasheet, A19520LUBBTN-FSNHPYUE-A pinout, A19520LUBBTN-FSNHPYUE-A application, or A19520LUBBTN-FSNHPYUE-A equivalent, this page delivers verified technical context, real-world timing behavior under vibration, ASIL error reporting capability, differential magnetic input range (±750 G), and functional safety compliance per ISO 26262 SEooC requirements.
Technical Context
The A19520LUBBTN-FSNHPYUE-A implements a SolidSpeed Digital Architecture with adaptive algorithms that dynamically calibrate thresholds based on detected magnetic signal peaks, enabling stable operation during high-vibration conditions and sudden air-gap changes. Its three-Hall-element front end forms two differential channels (E1–E2 and E2–E3) for inherent common-mode field rejection and precise edge detection.
It uses a two-wire current-source output with pulse-width modulation encoding: forward rotation yields 60 µs pulses, reverse yields 120 µs, and non-direction pulses are 30 µs (Intermediate variant). ASIL diagnostics generate distinct warning (63–121 µs) and critical (4–8 ms) pulses upon internal fault detection, all compliant with ISO 26262 hardware SEooC ASIL B requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4 V to 24 V - supports wide automotive battery voltage swing without external regulation |
| Operating Temperature | −40 °C to +150 °C - qualified for under-hood transmission control module placement |
| Differential Magnetic Input | ±750 G peak-to-peak - enables robust sensing across air gaps up to 3.5 mm with ring magnets |
| Pulse Width (Forward) | 51–69 µs - encodes direction unambiguously without additional communication lines |
| ASIL Warning Pulse | 63–121 µs - signals recoverable faults while maintaining basic functionality |
| Internal Capacitor | 10 nF - integrated between pins 1 and 2 for EMC filtering; eliminates external capacitor footprint |
| Vibration Immunity | High (H variant) - suppresses false direction reporting during ≥1× TCYCLE oscillation events |
Pinout & Package
The A19520LUBBTN-FSNHPYUE-A is housed in a lead-free 2-pin miniature SIP (suffix UB) package with overmolded construction, integrated capacitor, and molded lead-stabilizing bar for mechanical robustness during shipping and SMT assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Supply voltage input - accepts 4–24 V; includes internal Zener clamp (28 V) and undervoltage lockout (3.6–3.95 V) |
| 2 | GND | Ground return - forms two-wire loop with VCC; current output modulates between 5.9 mA (low) and 14 mA (high) |
Key Features
| Feature | Design Value |
|---|---|
| Differential Hall Sensing | Two independent differential channels (E1–E2, E2–E3) reject stray magnetic fields and enable reliable operation near motors or solenoids |
| Vibration-Tolerant Algorithm | Real-time analysis of sequential magnetic signal variation (BSEQ(n+1)/BSEQ(n) = 0.7–1.3) prevents false direction switching during gear rattle |
| ASIL B SEooC Compliance | Hardware-level diagnostics (EEPROM-traceable) and certified safety design process meet ISO 26262 requirements without system-level integration overhead |
| Integrated EMC Capacitor | 10 nF capacitor embedded between pins 1 and 2 reduces board-level filtering components and improves CISPR 25 Class 5 immunity |
| Two-Wire Pulse-Width Protocol | Single-loop current output encodes speed (frequency), direction (pulse width), and safety status (ASIL pulses) - no separate VDD/GND or digital interface needed |
Applications
| Automatic Transmission Gear Position Sensing | Electric Vehicle Motor Speed Monitoring |
|---|---|
Use Scenario: Detecting rotational direction and speed of input/output shafts in 8-speed automatic transmissions under high-vibration, high-temperature conditions. IC Role / Device Role / Timing Role: Differential Hall-effect sensor providing real-time direction and speed feedback to TCU via two-wire current loop. Use Value: Enables precise shift timing and clutch engagement control using only 60 µs/120 µs pulse widths - no external clock or SPI bus required. | Use Scenario: Measuring rotor speed and direction in traction motor inverters where EMI from PWM switching threatens signal integrity. IC Role / Device Role / Timing Role: Vibration-immune magnetic sensor with inherent common-mode rejection, placed adjacent to motor stator windings. Use Value: Maintains accurate speed reporting even during 10 g mechanical vibration and >1 kV/m radiated EMI due to integrated capacitor and differential architecture. |
| Hybrid Powertrain Mode Detection | Commercial Vehicle Driveline Diagnostics |
Use Scenario: Identifying powertrain mode transitions (EV-only, engine-on, regen braking) by detecting direction reversal and speed zero-crossing in P2 hybrid architectures. IC Role / Device Role / Timing Role: ASIL B–compliant sensor feeding direction-change event timing (≤3 × TCYCLE after change) to vehicle domain controller. Use Value: Supports fail-safe torque management during mode switches using certified diagnostic outputs - no software safety layer required. | Use Scenario: Monitoring driveline health in heavy-duty trucks by correlating vibration-induced pulse jitter with bearing wear or gear mesh defects. IC Role / Device Role / Timing Role: High-vibration-immunity sensor capturing microsecond-level pulse timing deviations during transient load events. Use Value: Enables predictive maintenance through factory-calibrated pulse-width stability metrics (BSEQ variation ≤30%) without adding test equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall-effect speed and direction sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ATS6858LSGTN-T | Single-channel output; no ASIL protocol; 125 °C max operating temperature; requires external capacitor | Lacks integrated diagnostics and failsafe reporting; suitable for non-safety-critical HVAC blower or pump control | Select only when ASIL B compliance and embedded EMC capacitance are not required |
| TLV4961-1K1T | Dual-output (speed + direction); no vibration immunity algorithm; 150 °C rating; 2-pin SIP but no integrated capacitor | Provides separate direction flag signal instead of pulse-width encoding; lacks ISO 26262 certification | Choose when discrete direction logic is preferred over encoded pulse protocol and safety certification is optional |
Compared with ATS6858LSGTN-T and TLV4961-1K1T, the A19520LUBBTN-FSNHPYUE-A uniquely combines ASIL B SEooC certification, integrated 10 nF EMC capacitor, and adaptive vibration immunity - eliminating external components and safety validation effort in transmission control designs.
Availability
A19520LUBBTN-FSNHPYUE-A is available at Aetrix Electronics and suitable for automotive transmission control, EV motor monitoring, hybrid powertrain mode detection, and commercial driveline diagnostics requiring stable component supply across extended temperature and vibration profiles.
Supply support for A19520LUBBTN-FSNHPYUE-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 semiconductor company specializing in high-performance magnetic sensing and power ICs for automotive and industrial applications.
The A19520 product line was developed specifically for vibration-prone automotive transmission environments, delivering robust speed/direction sensing with integrated safety and EMC features - reducing system-level design complexity and validation burden.
FAQ
What is the function of the integrated 10 nF capacitor in the A19520LUBBTN-FSNHPYUE-A?
The integrated 10 nF capacitor in the A19520LUBBTN-FSNHPYUE-A is connected between pins 1 (VCC) and 2 (GND) to provide on-chip electromagnetic compatibility filtering. It suppresses high-frequency noise on the supply line, improving immunity to radiated and conducted EMI per CISPR 25 Class 5 requirements - eliminating the need for an external capacitor and saving PCB space in tight transmission control modules. This capacitor is specific to the UBB variant denoted in the A19520LUBBTN-FSNHPYUE-A part number.
How does the A19520LUBBTN-FSNHPYUE-A detect direction change under high vibration?
The A19520LUBBTN-FSNHPYUE-A detects direction change under high vibration using its SolidSpeed Digital Architecture, which continuously analyzes sequential magnetic signal variation (BSEQ) and cycle-to-cycle amplitude ratios. For the "H" vibration-immunity variant (as indicated by "H" in position 7 of the part number), it suppresses direction output until constant rotation is verified after ≥3 × TCYCLE - preventing false switching during gear rattle or driveline oscillation. This behavior is confirmed in the device's functional description and Figure 14 of the official datasheet.
Does the A19520LUBBTN-FSNHPYUE-A require external programming or calibration before use?
No, the A19520LUBBTN-FSNHPYUE-A performs automatic on-the-fly calibration during startup. Within 4 × TCYCLE after power-on (tPO ≤ 1 ms), it detects the magnetic profile of the rotating target and establishes dynamic operate/release thresholds. No external programming, EEPROM writes, or manual calibration is needed - the device is fully operational immediately after the initial calibration period completes, as specified in the Operating Characteristics table on page 6 of the A19520 datasheet Rev. 9.
What safety documentation accompanies the A19520LUBBTN-FSNHPYUE-A?
The A19520LUBBTN-FSNHPYUE-A is delivered with full ISO 26262–compliant safety documentation, including the A19520 Safety Manual (document MCO-0000530), FMEDA report, safety analysis summary, and hardware SEooC evidence package. These documents confirm ASIL B capability out-of-context and define required integration constraints - such as mandatory use of the specified pulse-width protocol and adherence to voltage derating curves - to maintain safety goals in final system implementation.
Can the A19520LUBBTN-FSNHPYUE-A be used with ferrous targets without an external magnet?
No, the A19520LUBBTN-FSNHPYUE-A cannot sense ferrous targets without an external back-biasing magnet. It requires either a ring magnet target (for direct differential sensing) or a properly sized rare-earth pellet magnet placed behind the ferrous target to generate the necessary alternating magnetic field across its Hall elements (E1–E2–E3). The datasheet explicitly states that ferrous target operation is only possible "when back-biased with a magnet," and Figure 10 illustrates the required back-biasing configuration with a rare-earth pellet.
A19520LUBBTN-FSNHPYUE-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Package/Case:
- 2-SIP Module
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Hall Effect
- Output Type:
- Current
- Actuator Material:
- Ferrous Metals
- Termination Style:
- -
- Frequency:
- 12 kHz
- Voltage - Supply:
- 4V ~ 24V
- Must Operate:
- -
- Must Release:
- -
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- -
- Qualification:
- -
A19520LUBBTN-FSNHPYUE-A FAQ
1.How can I place an order for A19520LUBBTN-FSNHPYUE-A through Aetrix?
Please submit a Request for Quotation (RFQ) for A19520LUBBTN-FSNHPYUE-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 A19520LUBBTN-FSNHPYUE-A reliable?
The price and inventory of A19520LUBBTN-FSNHPYUE-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A19520LUBBTN-FSNHPYUE-A is usually 5 days.
3.What payment methods are accepted for A19520LUBBTN-FSNHPYUE-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A19520LUBBTN-FSNHPYUE-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A19520LUBBTN-FSNHPYUE-A?
A19520LUBBTN-FSNHPYUE-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A19520LUBBTN-FSNHPYUE-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 A19520LUBBTN-FSNHPYUE-A?
For technical support, including A19520LUBBTN-FSNHPYUE-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A19520LUBBTN-FSNHPYUE-A requirements.
6.How does Aetrix verify that A19520LUBBTN-FSNHPYUE-A is sourced from the original manufacturer or authorized distributors?
All A19520LUBBTN-FSNHPYUE-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 A19520LUBBTN-FSNHPYUE-A meets industry standards.
7.What is the process for return or replacement of A19520LUBBTN-FSNHPYUE-A?
All A19520LUBBTN-FSNHPYUE-A units undergo pre-shipment inspection (PSI). If there is an issue with A19520LUBBTN-FSNHPYUE-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 A19520LUBBTN-FSNHPYUE-A part is unused and in its original packaging.
Return procedure for A19520LUBBTN-FSNHPYUE-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
A19520LUBBTN-FSNHPYUE-A Tags
-
HS-3511-02-0300
PIC GmbH
-
ATS19480LSNBTN
Allegro MicroSystems
-
55100-2M-02-A
Littelfuse Inc.
-
55100-3H-02-A
Littelfuse Inc.
-
55100-3M-02-A
Littelfuse Inc.
-
55100-3M-03-A
Littelfuse Inc.
-
55100-3H-04-A
Littelfuse Inc.
-
55140-3H-02-A
Littelfuse Inc.
-
55100-AP-02-A
Littelfuse Inc.
-
GS101201
ZF Electronics
-
55505-00-02-A
Littelfuse Inc.
-
GS100701
ZF Electronics
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