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Allegro MicroSystems A19520LUBBTN-RSNHPYUE
- Part No.:
- A19520LUBBTN-RSNHPYUE
- Manufacturer:
- Allegro MicroSystems
- Category:
- Angle, Linear Position Measuring
- Package:
- 2-SIP Module
- Datasheet:
-
A19520LUBBTN-RSNHPYUE.pdf
- Description:
- 2-WIRE ASIL COMPLIANT TRANSMISSI
- Quantity:
- Payment:
- Shipping:
Inventory:2,315
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Product details
Overview
A19520LUBBTN-RSNHPYUE from Allegro MicroSystems is a vibration-tolerant, ASIL B–compliant Hall-effect speed and direction sensor IC designed for automotive transmission applications. It measures rotating ring magnets or ferrous targets using differential Hall sensing, delivers two-wire current-source output with pulse-width-encoded speed/direction/ASIL error reporting, and integrates a 22 nF EMC capacitor in a 2-pin SIP (UB) package rated for –40°C to +150°C operation.
For engineers reviewing the A19520LUBBTN-RSNHPYUE datasheet, A19520LUBBTN-RSNHPYUE pinout, A19520LUBBTN-RSNHPYUE application, or A19520LUBBTN-RSNHPYUE equivalent, this page provides verified technical context, pin-level design meaning, automotive safety integration guidance, and validated alternative options for transmission position and speed sensing systems.
Technical Context
The A19520LUBBTN-RSNHPYUE implements a solid-speed digital architecture with adaptive algorithms that detect target vibration and direction changes via real-time analysis of differential magnetic input (BDIFF), enabling stable operation under dynamic air gap conditions. Its dual-channel differential front end (E1–E2 and E2–E3) rejects common-mode stray fields while resolving ±750 G differential magnetic range with 30 G pk-pk minimum operating amplitude.
This variant uses high-vibration-immunity firmware (H), narrow-pulse-width encoding (N), pulsed output during calibration (Y), and a 22 nF internal capacitor (L). It supports forward/reverse rotation detection via pulse width discrimination (45 µs FWD / 90 µs REV / 180 µs ND), operates up to 12 kHz in forward mode, and enters ASIL safe state with 63–121 µs warning pulses or 4–8 ms critical pulses upon internal fault detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4–24 V - Enables direct connection to automotive battery rails with undervoltage lockout at 3.6–3.95 V. |
| Operating Temperature | –40°C to +150°C - Qualified for under-hood transmission control module placement without external thermal management. |
| Differential Magnetic Range | ±750 G - Supports robust sensing across wide air gaps and temperature-induced magnet strength drift. |
| Pulse Width (FWD/REV/ND) | 45 / 90 / 180 µs - Encodes direction and enables deterministic microcontroller decoding without additional timing circuitry. |
| Internal Capacitor | 22 nF - Integrated between pins 1 and 2 for EMC compliance; eliminates need for external decoupling capacitor. |
| Vibration Immunity | High (H) - Suppresses false direction reporting during mechanical oscillation; resumes valid output after 3× TCYCLE verification. |
| ASIL Compliance | ASIL B SEooC per ISO 26262 - Certified hardware safety element requiring integration per safety manual for functional safety systems. |
Pinout & Package
The A19520LUBBTN-RSNHPYUE is housed in a lead-free, tin-plated 2-pin miniature SIP (suffix UB) package measuring 18.00 mm × 4.00 mm × 1.80 mm, featuring an overmolded construction with integrated capacitor and molded lead-stabilizing bar for shipping robustness and automated assembly reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Supply voltage input - Accepts 4–24 V; includes internal Zener clamp (28 V) and reverse supply protection (–18 V). |
| 2 | GND | Ground reference - Serves as return path for both supply current and two-wire current-source output signal. |
Key Features
| Feature | Design Value |
|---|---|
| Differential Hall Sensing | Rejects stray magnetic fields via E1–E2/E2–E3 channel pairing; enables reliable operation near motors or solenoids. |
| Vibration-Tolerant Algorithm | Identifies and suppresses false direction transitions during mechanical oscillation; recovers within 3× TCYCLE after stabilization. |
| Two-Wire Current-Source Output | Eliminates separate signal wire; encodes speed (frequency), direction (pulse width), and ASIL status (pulse duration) on single load line. |
| Integrated 22 nF Capacitor | Embedded between pins 1 and 2 - meets CISPR 25 Class 5 EMC requirements without external components. |
| EEPROM Traceability | Stores factory-programmed identifiers - supports full traceability for automotive PPAP and audit requirements. |
Applications
| Automatic Transmission Gear Position Sensing | CVT Ratio Control Feedback |
|---|---|
|
Use Scenario: Detecting rotational speed and direction of input/output shafts in automatic transmissions to determine gear engagement state and torque transfer direction. IC Role / Device Role / Timing Role: Primary speed-and-direction sensor feeding transmission control unit (TCU) with real-time shaft motion data for shift scheduling and clutch pressure modulation. Use Value: High-vibration immunity ensures accurate direction reporting during gear engagement shocks; ASIL B compliance enables integration into safety-critical TCU diagnostic paths. |
Use Scenario: Monitoring pulley rotation in continuously variable transmissions to calculate ratio and verify belt slip or stall conditions. IC Role / Device Role / Timing Role: Differential Hall sensor providing synchronized pulse-width outputs for CVT controller to compute instantaneous ratio and detect mechanical anomalies. Use Value: Narrow-pulse option (45/90/180 µs) allows precise timing resolution at high shaft speeds; integrated capacitor simplifies PCB layout in space-constrained CVT control modules. |
| Electric Powertrain Motor Speed Feedback | Hybrid Vehicle Mode Transition Detection |
|
Use Scenario: Measuring rotor speed and direction in electric traction motors to support field-oriented control (FOC) and regenerative braking sequencing. IC Role / Device Role / Timing Role: Robust magnetic sensor interfacing directly to motor control MCU via two-wire interface, delivering direction-aware speed pulses without isolated communication. Use Value: Operates reliably at 150°C ambient - suitable for direct mounting on motor housings; ASIL B capability supports functional safety requirements for EV drivetrain control. |
Use Scenario: Detecting engine start/stop and electric motor engagement sequences during hybrid mode transitions (e.g., EV-to-HEV or engine restart). IC Role / Device Role / Timing Role: Dual-purpose sensor identifying both rotational presence and directional change to validate power source handover timing and prevent torque conflict. Use Value: High-vibration immunity prevents false triggers during combustion ignition events; EEPROM traceability supports OEM calibration version control across hybrid platform variants. |
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 |
|---|---|---|---|
| A19350LUBBTN-RSNHPYUE | Lower magnetic sensitivity (20 G pk-pk min); no ASIL B certification; same UB package and pinout. | Lacks ISO 26262 hardware safety qualification; suitable only for non-safety-critical subsystems like HVAC blower feedback. | Select when ASIL compliance is not required and cost optimization is prioritized over functional safety assurance. |
| ATS6858LSGT-T | Single-channel output; fixed 5 V supply; requires external capacitor; supports 125°C max ambient. | Not qualified to ASIL B; lacks vibration immunity algorithms; limited to lower-temperature transmission subassemblies. | Choose for legacy designs where 5 V rail availability and simpler diagnostics outweigh vibration tolerance and safety certification needs. |
Compared with A19520LUBBTN-RSNHPYUE, the A19350 offers reduced cost but forfeits ASIL B qualification and vibration resilience, while the ATS6858 requires external components and cannot operate at 150°C - making A19520LUBBTN-RSNHPYUE the only option meeting full transmission-grade thermal, EMC, and safety requirements in a single-package solution.
Availability
A19520LUBBTN-RSNHPYUE is available at Aetrix Electronics and suitable for automatic transmission control, CVT ratio monitoring, electric powertrain feedback, hybrid mode transition detection, and ASIL B–compliant vehicle motion sensing requiring stable component supply across automotive production lifecycles.
Supply support for A19520LUBBTN-RSNHPYUE 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 ICs, specializing in automotive, industrial, and energy-efficient motion control solutions.
The A19520 product line was developed specifically for vibration-prone automotive transmission and powertrain applications, combining differential Hall sensing, adaptive signal processing, and functional safety compliance in miniature SIP packages.
FAQ
What is the function of the internal 22 nF capacitor in the A19520LUBBTN-RSNHPYUE?
The internal 22 nF capacitor in the A19520LUBBTN-RSNHPYUE is connected between pins 1 (VCC) and 2 (GND) to provide electromagnetic compatibility (EMC) filtering per CISPR 25 Class 5 requirements. It eliminates the need for an external decoupling capacitor, reduces PCB footprint, and ensures consistent EMC performance across manufacturing lots without layout-dependent tuning. This capacitor is integral to the UB package's overmolded construction and cannot be omitted or substituted.
How does the A19520LUBBTN-RSNHPYUE differentiate forward and reverse rotation?
The A19520LUBBTN-RSNHPYUE differentiates forward and reverse rotation by encoding direction into output pulse width: 45 µs for forward, 90 µs for reverse, and 180 µs for non-directional pulses. This pulse-width protocol is generated by the IC's digital controller based on phase relationships between its three Hall elements (E1–E2–E3), and is delivered via two-wire current-source output without requiring external logic or timing circuitry. The RSNHPYUE suffix confirms the "R" (reverse-forward mapping) and "N" (narrow pulse) configuration.
Is the A19520LUBBTN-RSNHPYUE pin-compatible with other A19520 variants?
Yes, all A19520 variants-including A19520LUBBTN-RSNHPYUE-share identical 2-pin SIP (UB) packaging and pinout: pin 1 is VCC and pin 2 is GND. Mechanical dimensions, solder pad layout, and terminal functions are fully consistent across variants. Differences reside solely in firmware configuration (vibration immunity level, pulse width, calibration behavior, ASIL enablement) and internal capacitor value (10 nF vs. 22 nF), not in physical connectivity or electrical interface.
What does the "H" in the A19520LUBBTN-RSNHPYUE part number indicate?
The "H" in A19520LUBBTN-RSNHPYUE denotes high-vibration-immunity firmware. When vibration is detected-such as during gear engagement shock or engine firing-the IC suppresses direction output until constant rotation is verified over 3× TCYCLE, preventing false direction reporting. This differs from the "L" (low-vibration) variant, which reports the first direction change immediately. The "H" setting is essential for transmission applications where mechanical oscillation is frequent and direction accuracy must be maintained post-disturbance.
Does the A19520LUBBTN-RSNHPYUE require external programming or calibration after installation?
No, the A19520LUBBTN-RSNHPYUE performs automatic on-the-fly calibration during startup: within 4× TCYCLE after power-on, it analyzes the first few magnetic cycles to set dynamic thresholds and establish baseline direction detection. Factory-programmed parameters-including pulse width profile, vibration immunity level, and ASIL protocol-are stored in EEPROM and require no field reprogramming. No external tools, host MCU intervention, or calibration fixtures are needed for standard operation.
A19520LUBBTN-RSNHPYUE 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:
- 4V ~ 24V
- Mounting Type:
- Through Hole
- Termination Style:
- PC Pin
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 2-UltraMini SIP
A19520LUBBTN-RSNHPYUE FAQ
1.How can I place an order for A19520LUBBTN-RSNHPYUE through Aetrix?
Please submit a Request for Quotation (RFQ) for A19520LUBBTN-RSNHPYUE 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-RSNHPYUE reliable?
The price and inventory of A19520LUBBTN-RSNHPYUE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A19520LUBBTN-RSNHPYUE is usually 5 days.
3.What payment methods are accepted for A19520LUBBTN-RSNHPYUE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A19520LUBBTN-RSNHPYUE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A19520LUBBTN-RSNHPYUE?
A19520LUBBTN-RSNHPYUE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A19520LUBBTN-RSNHPYUE 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-RSNHPYUE?
For technical support, including A19520LUBBTN-RSNHPYUE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A19520LUBBTN-RSNHPYUE requirements.
6.How does Aetrix verify that A19520LUBBTN-RSNHPYUE is sourced from the original manufacturer or authorized distributors?
All A19520LUBBTN-RSNHPYUE 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-RSNHPYUE meets industry standards.
7.What is the process for return or replacement of A19520LUBBTN-RSNHPYUE?
All A19520LUBBTN-RSNHPYUE units undergo pre-shipment inspection (PSI). If there is an issue with A19520LUBBTN-RSNHPYUE, 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-RSNHPYUE part is unused and in its original packaging.
Return procedure for A19520LUBBTN-RSNHPYUE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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