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Allegro MicroSystems A19420LUBBTN-E
- Part No.:
- A19420LUBBTN-E
- Manufacturer:
- Allegro MicroSystems
- Package:
- 2-SIP Module
- Datasheet:
-
A19420LUBBTN-E.pdf
- Description:
- 2-WIRE HIGH-ACCURACY HALL-EFFECT
- Quantity:
- Payment:
- Shipping:
Inventory:3,404
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Product details
Overview
A19420LUBBTN-E from Allegro MicroSystems is a high-accuracy, ASIL B-compliant Hall-effect transmission speed sensor IC in a 2-pin SIP (UB) package. It measures rotational speed of ring magnets or ferrous targets using differential sensing, delivers two-wire current-source output (ICC(LOW) = 7 mA, ICC(HIGH) = 14 mA), and operates from –40°C to +150°C with integrated 10 nF EMC capacitor for automotive transmission systems.
For engineers reviewing the A19420LUBBTN-E datasheet, A19420LUBBTN-E pinout, A19420LUBBTN-E application, or A19420LUBBTN-E equivalent, this page provides verified technical context, real-world timing performance under dynamic air gap, ASIL error reporting behavior, differential magnetic immunity, and OEM supply-chain support for safety-critical drivetrain designs.
Technical Context
The A19420LUBBTN-E implements a synchronous digital controller with SolidSpeed Digital Architecture, enabling stable edge detection during rapid air gap variation (TWINDOW = 3 × TCYCLE). Its dual Hall elements (E1/E2) generate differential magnetic input (BDIFF) with ±750 G operating range and 20 G pk-pk minimum sensitivity.
It features EEPROM-based traceability, undervoltage lockout (3.6–3.95 V), and ASIL-safe state protocols-triggering tw(ASILwarn) = 63–121 μs or tw(ASILcrit) = 4–8 ms pulses upon fault detection-while maintaining functional operation up to 12 kHz frequency and 165°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Frequency | Up to 12 kHz - supports high-speed gear tooth or pole counting in automatic transmissions |
| Differential Magnetic Range | ±750 G - enables robust sensing across wide air gaps with ferrite or neodymium magnets |
| Supply Voltage Range | 4–24 V - compatible with 12 V automotive battery systems including load-dump transients |
| Output Protocol | Two-wire current source (7/14 mA) - eliminates need for external pull-up resistors and simplifies wiring harnesses |
| ASIL Compliance | ASIL B SEooC per ISO 26262 - certified hardware safety element for use in safety-managed transmission control units |
| Integrated Capacitor | 10 nF between pins 1–2 - meets EMC requirements without external components, reducing PCB area and BOM count |
| Thermal Resistance | RθJA = 213 °C/W - validated on single-layer PCB, supports operation at 150°C ambient with proper derating |
Pinout & Package
The A19420LUBBTN-E is housed in a lead-free, overmolded 2-pin SIP (suffix UB) package with molded lead-stabilizing bar for mechanical robustness. Dimensions: 18.00 × 4.00 × 1.80 mm (L×W×H), branded face orientation critical for target alignment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Supply Voltage Input | Accepts 4–24 V DC; includes internal Zener clamp (28 V) and UVLO (3.6–3.95 V) for automotive transient protection |
| GND (Pin 2) | Ground Reference / Output Return | Serves as current-sink return path; output transitions modulate ICC between 7 mA (LOW) and 14 mA (HIGH) |
Key Features
| Feature | Design Value |
|---|---|
| Differential Hall Sensing | Inherent rejection of common-mode stray fields - ensures reliable operation near high-current cables or solenoids |
| SolidSpeed Digital Architecture | Maintains pitch/duty cycle accuracy during sudden air gap changes - prevents missed edges in clutch engagement or gear shift events |
| ASIL Error Reporting | Dual-level fault signaling (warning/critical pulses) - enables layered diagnostics in AUTOSAR-compliant ECUs without additional hardware |
| Integrated EMC Capacitor | 10 nF monolithic capacitor embedded in package - eliminates external decoupling component and associated layout sensitivity |
| EEPROM Traceability | Device-specific calibration and lot data stored on-chip - supports IATF 16949 production traceability and field failure analysis |
Applications
| Automatic Transmission Speed Sensing | CVT Input Shaft Monitoring |
|---|---|
Use Scenario: Measuring rotational speed of input shaft gear in 8-speed automatic transmission under thermal cycling and vibration. IC Role / Device Role / Timing Role: Differential Hall-effect sensor providing edge-accurate speed pulses to TCU for torque converter lockup and shift scheduling. Use Value: Maintains <1.5× TCYCLE first-edge latency and stable duty cycle during 0.5 mm air gap variation - improves shift smoothness and fuel economy. | Use Scenario: Detecting input shaft rotation in continuously variable transmission with aluminum housing and high EMI environment. IC Role / Device Role / Timing Role: Two-wire current-output sensor delivering ASIL B-compliant speed data to CVT controller via shared power line. Use Value: Integrated 10 nF capacitor and differential architecture reject >40 dB of common-mode noise - eliminates false triggering from inverter switching. |
| Electric Power Steering Motor RPM | Hybrid Vehicle Gearbox Synchronization |
Use Scenario: Monitoring assist motor speed in EPS system where space constraints limit PCB area and thermal management. IC Role / Device Role / Timing Role: Compact 2-pin SIP sensor mounted directly on motor housing, feeding real-time RPM to EPS ECU. Use Value: RθJA = 213 °C/W and –40°C to +150°C rating enable direct mounting on 120°C motor casings - reduces sensor-to-ECU cabling and latency. | Use Scenario: Synchronizing ICE and electric motor outputs in P2 hybrid gearbox during mode transitions. IC Role / Device Role / Timing Role: High-accuracy speed sensor providing phase-aligned pulses to hybrid control unit for torque blending. Use Value: SolidSpeed algorithm preserves edge timing within ±5% duty cycle deviation during 10 mm/s air gap drift - ensures seamless torque handover. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall-effect transmission speed sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ATS684LSN-T | Single-ended output, no integrated capacitor, ASIL A only, 10 kHz max frequency | Lacks ASIL B compliance and differential noise immunity; requires external decoupling | Lower-cost option for non-safety-critical auxiliary speed monitoring where EMC margin is controlled externally |
| TLV4961-1HALA | Two-wire interface, but no EEPROM, no ASIL certification, 8 kHz max frequency, no integrated capacitor | Missing diagnostic traceability and safety manual integration; limited to non-ASIL subsystems | Suitable for cost-sensitive industrial gearmotor feedback where full automotive qualification is not required |
Compared with ATS684LSN-T and TLV4961-1HALA, the A19420LUBBTN-E uniquely combines ASIL B SEooC certification, integrated 10 nF EMC capacitor, differential sensing, and SolidSpeed dynamic air gap compensation - making it the only qualified solution for primary transmission speed sensing in ISO 26262-compliant powertrain ECUs.
Availability
A19420LUBBTN-E is available at Aetrix Electronics and suitable for automatic transmission control, CVT input shaft monitoring, and hybrid vehicle gearbox synchronization requiring stable component supply, full ASIL B documentation, and long-term automotive lifecycle support.
Supply support for A19420LUBBTN-E 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, headquartered in Manchester, NH, with global automotive qualification and AEC-Q200 validation expertise.
The A19420 product line was developed specifically for high-reliability, safety-critical rotational speed measurement in automotive powertrain systems-including automatic, dual-clutch, and hybrid transmissions-where dynamic air gap resilience and ASIL B compliance are mandatory.
FAQ
What is the operating temperature range for the A19420LUBBTN-E?
The A19420LUBBTN-E operates from –40°C to +150°C ambient temperature, validated across its full specification range. This rating supports direct mounting on transmission housings and motor casings in demanding automotive environments. The device's thermal design includes RθJA = 213 °C/W on single-layer PCBs, and junction temperature must remain ≤165°C under all conditions. Derating curves in the datasheet guide voltage selection at elevated ambient temperatures.
Does the A19420LUBBTN-E require an external capacitor for EMC compliance?
No, the A19420LUBBTN-E does not require an external capacitor for basic EMC compliance. It integrates a 10 nF capacitor internally between pins 1 (VCC) and 2 (GND), eliminating the need for discrete decoupling components. This integrated solution reduces PCB footprint, assembly steps, and susceptibility to layout-induced noise-critical for compact transmission control modules where space and reliability are constrained.
How does the A19420LUBBTN-E implement ASIL B safety functionality?
The A19420LUBBTN-E implements ASIL B as a hardware safety element out-of-context (SEooC) per ISO 26262. It continuously monitors internal faults and reports errors via distinct current-pulse protocols: tw(ASILwarn) = 63–121 μs for warnings and tw(ASILcrit) = 4–8 ms for critical faults. These signals are generated without software intervention and are defined in the A19420 Safety Manual. The device itself does not perform safety shutdown-it enables the host ECU to take appropriate action.
Can the A19420LUBBTN-E sense both ring magnets and ferrous targets?
Yes, the A19420LUBBTN-E can directly sense ring magnets using its differential Hall elements (E1/E2), or sense ferrous targets when back-biased with an external magnet (e.g., samarium cobalt or neodymium). The device automatically adapts switchpoints (BOP = 70%, BRP = 30% of BDIFF(pk-pk)) and compensates for magnetic temperature drift (0.16%/°C for –E variant). Target orientation must align the branded face of the package with the center of the rotating target for optimal signal integrity.
What is the meaning of the "-E" suffix in A19420LUBBTN-E?
The "-E" suffix in A19420LUBBTN-E indicates magnetic temperature compensation optimized for ferrite or neodymium magnets (TC = 0.16%/°C). It also denotes that the ASIL protocol is enabled (as opposed to blank-suffix variants). The "LUBBTN" portion specifies the 2-pin SIP (UB) package, tape-and-reel packaging (TN), and lead-free finish (L). This full part number identifies a production-ready, automotive-qualified variant with full safety documentation and traceability.
A19420LUBBTN-E 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:
- -
A19420LUBBTN-E FAQ
1.How can I place an order for A19420LUBBTN-E through Aetrix?
Please submit a Request for Quotation (RFQ) for A19420LUBBTN-E 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 A19420LUBBTN-E reliable?
The price and inventory of A19420LUBBTN-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A19420LUBBTN-E is usually 5 days.
3.What payment methods are accepted for A19420LUBBTN-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A19420LUBBTN-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A19420LUBBTN-E?
A19420LUBBTN-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A19420LUBBTN-E 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 A19420LUBBTN-E?
For technical support, including A19420LUBBTN-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A19420LUBBTN-E requirements.
6.How does Aetrix verify that A19420LUBBTN-E is sourced from the original manufacturer or authorized distributors?
All A19420LUBBTN-E 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 A19420LUBBTN-E meets industry standards.
7.What is the process for return or replacement of A19420LUBBTN-E?
All A19420LUBBTN-E units undergo pre-shipment inspection (PSI). If there is an issue with A19420LUBBTN-E, 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 A19420LUBBTN-E part is unused and in its original packaging.
Return procedure for A19420LUBBTN-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
A19420LUBBTN-E 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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