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Allegro MicroSystems A19520LUBBTN-RSNHPYUE-A
- Part No.:
- A19520LUBBTN-RSNHPYUE-A
- Manufacturer:
- Allegro MicroSystems
- Package:
- 2-SIP Module
- Datasheet:
-
A19520LUBBTN-RSNHPYUE-A.pdf
- Description:
- 2-WIRE ASIL COMPLIANT TRANSMISSI
- Quantity:
- Payment:
- Shipping:
Inventory:1,685
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Product details
Overview
A19520LUBBTN-RSNHPYUE-A from Allegro MicroSystems is a vibration-tolerant, ASIL B–compliant Hall-effect speed and direction sensor IC 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 10 nF EMC capacitor in a 2-pin SIP (UB) package rated for –40°C to +150°C operation.
For engineers reviewing the A19520LUBBTN-RSNHPYUE-A datasheet, A19520LUBBTN-RSNHPYUE-A pinout, A19520LUBBTN-RSNHPYUE-A application, or A19520LUBBTN-RSNHPYUE-A equivalent, this page provides verified technical context, real-world timing behavior under vibration, ASIL B safety architecture details, and validated alternatives for transmission position-sensing designs requiring robust air-gap tolerance and ISO 26262 compliance.
Technical Context
The A19520LUBBTN-RSNHPYUE-A implements a dual-channel differential Hall front-end with three integrated Hall elements (E1–E3), enabling inherent rejection of common-mode stray fields and precise detection of magnetic pole-pair transitions. Its SolidSpeed Digital Architecture applies adaptive algorithms to dynamically adjust thresholds during vibration events and maintain stable direction detection even under sudden air-gap changes.
This variant uses the "R" rotation configuration (forward = pin 2 to pin 1), "H" high-vibration immunity mode (first direction pulse delayed by 3×TCYCLE after change), "P" running-mode non-direction pulses enabled, "Y" calibration-mode non-direction pulses enabled, and "-A" ASIL protocol active with internal 10 nF capacitor (UBB variant). It outputs pulse widths of 45 µs (forward), 180 µs (reverse), and 360 µs (non-direction) per the Wide (W) option.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4 V to 24 V - supports direct connection to automotive battery rails with undervoltage lockout at 3.6 V |
| Operating Temperature | –40°C to +150°C - qualified for under-hood transmission control module placement |
| Output Protocol | Two-wire current-source PWM - encodes speed (pulse rate), direction (pulse width), and ASIL faults (warning/critical pulses) without external components |
| Differential Magnetic Input | ±750 G peak-to-peak - enables reliable detection across wide air gaps with ring magnets or back-biased ferrous targets |
| Vibration Immunity | High (H) mode - suppresses spurious direction output during mechanical oscillation; resumes only after confirmed constant rotation |
| Internal Capacitor | 10 nF - integrated between pins 1 and 2 for EMC filtering, eliminating need for external decoupling |
| ASIL Compliance | ASIL B hardware safety element out-of-context (SEooC) - certified per ISO 26262 for use in safety-related systems when implemented per safety manual |
Pinout & Package
The A19520LUBBTN-RSNHPYUE-A is housed in a lead-free 2-pin miniature SIP (suffix UB) package with molded lead-stabilizing bar, overmolded construction, and branded face indicating pin 1 orientation. Dimensions: 18.00 mm × 4.00 mm × 1.80 mm (L × W × H), with 2.54 mm pin pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Supply Voltage Input | Accepts 4–24 V DC; powers internal regulator, analog front-end, and digital controller; connects to internal 10 nF capacitor |
| GND (Pin 2) | Ground Reference | Return path for supply current and output current sink; forms two-wire loop with load resistor RL on external side |
Key Features
| Feature | Design Value |
|---|---|
| Differential Hall Sensing | Rejects >95% of common-mode stray fields via E1–E2/E2–E3 channel pairing, enabling operation near high-current wiring or solenoids |
| Vibration-Tolerant Algorithm | Adaptively filters magnetic signal transients during gear-shift shock or driveline resonance, maintaining direction integrity up to 12 kHz |
| Integrated EMC Capacitor | 10 nF capacitor embedded in same overmolded package as IC - eliminates PCB layout sensitivity and reduces BOM count by one component |
| ASIL B Safe State Reporting | Generates distinct pulse-width-coded warnings (63–121 µs) and critical errors (4–8 ms) on single output line - no additional fault bus required |
| EEPROM Traceability | Factory-programmed device identifier stored in on-chip EEPROM - supports full production traceability and counterfeit prevention |
Applications
| Automatic Transmission Gear Position Sensing | Electric Vehicle (EV) Gearbox Speed Monitoring |
|---|---|
Use Scenario: Detecting rotational speed and direction of input/output shafts in 8-speed automatic transmissions under high-vibration, high-temperature conditions. IC Role / Device Role / Timing Role: Differential Hall sensor providing real-time shaft direction and RPM feedback to TCM for shift logic and torque management. Use Value: Enables vibration-immune direction detection during gear engagement, reducing false shift commands and improving shift smoothness. | Use Scenario: Monitoring motor and gearbox speed/direction in EV powertrain inverters where air gap varies due to thermal expansion and mechanical deflection. IC Role / Device Role / Timing Role: Two-wire current-output sensor delivering ASIL-compliant speed/direction data to MCU over long harness runs with minimal EMI susceptibility. Use Value: Integrated 10 nF capacitor ensures EMC robustness across full temperature range, eliminating field failures from conducted noise. |
| Hybrid Powertrain Clutch Engagement Control | Commercial Vehicle Transmission Diagnostics |
Use Scenario: Verifying bidirectional clutch actuation in P2 hybrid architectures where rapid direction reversal occurs during engine start-stop cycles. IC Role / Device Role / Timing Role: High-vibration immunity (H) variant detecting immediate direction reversal with 3×TCYCLE latency, synchronized to clutch solenoid timing. Use Value: Prevents misinterpretation of clutch slip as direction reversal, enabling accurate torque vectoring and reducing driveline wear. | Use Scenario: Providing diagnostic-ready speed/direction signals in heavy-duty truck transmissions where ASIL B compliance is mandated for predictive maintenance systems. IC Role / Device Role / Timing Role: ASIL protocol-enabled sensor generating standardized warning/critical pulses for CAN-based telematics gateways. Use Value: Eliminates need for external safety monitor IC - reduces system cost and board space while meeting OEM functional safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall-effect transmission speed and direction sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| A19350LUBBTN-RSNHPYUE-A | Single-ended Hall architecture; no differential channel pair; lower vibration immunity; no ASIL B certification | Lacks inherent stray-field rejection and fails ISO 26262 ASIL B requirements; suitable only for non-safety-critical auxiliary speed sensing | Select only if ASIL compliance and differential noise immunity are not required, and cost is primary constraint |
| ATS6858LSGTN-RSNHPYUE-T | Programmable gain amplifier; adjustable hysteresis; supports wider magnetic amplitude range; no integrated capacitor | Requires external 10 nF capacitor and careful PCB layout for EMC; lacks factory-traceable EEPROM and ASIL B SEooC documentation | Choose when magnetic target strength varies significantly across platforms and design flexibility outweighs safety certification needs |
Compared with A19520LUBBTN-RSNHPYUE-A, the A19350 offers lower cost but no functional safety capability or differential noise immunity, while the ATS6858 provides greater magnetic tuning range at the expense of added layout complexity and missing ASIL B validation - making A19520LUBBTN-RSNHPYUE-A the optimal choice for safety-critical, high-noise transmission environments.
Availability
A19520LUBBTN-RSNHPYUE-A is available at Aetrix Electronics and suitable for automatic transmission control modules, EV powertrain monitoring systems, and hybrid vehicle clutch actuation circuits requiring stable component supply, full ASIL B documentation support, and guaranteed long-term automotive lifecycle availability.
Supply support for A19520LUBBTN-RSNHPYUE-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 ICs, specializing in automotive-grade Hall-effect sensors, motor drivers, and current sensors since 1989.
The A19520 product line was developed specifically for vibration-prone transmission speed and direction sensing, integrating differential sensing, adaptive algorithms, and ISO 26262–compliant safety architecture into a compact, EMC-hardened package.
FAQ
What is the function of the "R" in A19520LUBBTN-RSNHPYUE-A?
The "R" denotes the rotation configuration: forward rotation is defined as target motion from pin 2 to pin 1. This matches mechanical mounting where the sensor faces the rotating gear from the opposite side of the standard "F" (pin 1 to pin 2) orientation. The A19520LUBBTN-RSNHPYUE-A uses this reversed polarity mapping to ensure correct direction interpretation in specific transmission layouts.
Does A19520LUBBTN-RSNHPYUE-A require an external capacitor?
No, A19520LUBBTN-RSNHPYUE-A includes an integrated 10 nF capacitor between pins 1 and 2 for supply filtering and EMC compliance. This eliminates the need for external decoupling and simplifies PCB layout - a key differentiator versus competitive Hall sensors that mandate discrete capacitors for stable operation in noisy automotive environments.
How does the ASIL B compliance of A19520LUBBTN-RSNHPYUE-A impact system design?
A19520LUBBTN-RSNHPYUE-A is certified as an ASIL B hardware safety element out-of-context (SEooC), meaning it provides documented failure modes, diagnostic coverage metrics, and safe state behavior per ISO 26262. When integrated per the safety manual, it reduces the ASIL decomposition burden on the host ECU - allowing the system-level design to achieve ASIL B without requiring redundant sensors or complex software diagnostics for this subsystem.
What is the significance of the "H" and "P" codes in A19520LUBBTN-RSNHPYUE-A?
The "H" specifies high-vibration immunity mode - the A19520LUBBTN-RSNHPYUE-A suppresses direction output during vibration and requires 3×TCYCLE of stable rotation before resuming valid direction reporting. The "P" enables non-direction pulses during running mode, allowing continuous speed feedback even when direction is indeterminate - critical for diagnostics during transient mechanical disturbances.
Can A19520LUBBTN-RSNHPYUE-A be used with ferrous targets without an external magnet?
No, A19520LUBBTN-RSNHPYUE-A requires either a ring magnet target or a back-biasing magnet when used with ferrous targets. The IC itself does not generate a bias field; its differential Hall elements detect field gradients induced by moving ferrous features only when paired with an external rare-earth magnet placed behind the sensor package - as shown in Figure 10 of the datasheet.
A19520LUBBTN-RSNHPYUE-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-RSNHPYUE-A FAQ
1.How can I place an order for A19520LUBBTN-RSNHPYUE-A through Aetrix?
Please submit a Request for Quotation (RFQ) for A19520LUBBTN-RSNHPYUE-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-RSNHPYUE-A reliable?
The price and inventory of A19520LUBBTN-RSNHPYUE-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-RSNHPYUE-A is usually 5 days.
3.What payment methods are accepted for A19520LUBBTN-RSNHPYUE-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A19520LUBBTN-RSNHPYUE-A transactions.
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4.How is shipping managed for A19520LUBBTN-RSNHPYUE-A?
A19520LUBBTN-RSNHPYUE-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A19520LUBBTN-RSNHPYUE-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-RSNHPYUE-A?
For technical support, including A19520LUBBTN-RSNHPYUE-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A19520LUBBTN-RSNHPYUE-A requirements.
6.How does Aetrix verify that A19520LUBBTN-RSNHPYUE-A is sourced from the original manufacturer or authorized distributors?
All A19520LUBBTN-RSNHPYUE-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-RSNHPYUE-A meets industry standards.
7.What is the process for return or replacement of A19520LUBBTN-RSNHPYUE-A?
All A19520LUBBTN-RSNHPYUE-A units undergo pre-shipment inspection (PSI). If there is an issue with A19520LUBBTN-RSNHPYUE-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-RSNHPYUE-A part is unused and in its original packaging.
Return procedure for A19520LUBBTN-RSNHPYUE-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
A19520LUBBTN-RSNHPYUE-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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