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Allegro MicroSystems A19420LUBBTN-G
- Part No.:
- A19420LUBBTN-G
- Manufacturer:
- Allegro MicroSystems
- Package:
- 2-SIP Module
- Datasheet:
-
A19420LUBBTN-G.pdf
- Description:
- 2-WIRE HIGH-ACCURACY HALL-EFFECT
- Quantity:
- Payment:
- Shipping:
Inventory:3,595
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Product details
Overview
A19420LUBBTN-G 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 (5.9–16 mA), operates from –40°C to +150°C, and integrates an EMC capacitor (10 nF). It is designed for automotive transmission position/speed sensing with dynamic air gap compensation.
For engineers reviewing the A19420LUBBTN-G datasheet, A19420LUBBTN-G pinout, A19420LUBBTN-G application, or A19420LUBBTN-G equivalent, this page provides verified functional context, safety-critical timing behavior, differential magnetic immunity, SolidSpeed digital architecture performance under air gap disturbance, and ASIL error reporting protocol details essential for transmission control unit (TCU) integration.
Technical Context
The A19420LUBBTN-G implements a synchronous digital controller with full-range ADC and EEPROM-based traceability, enabling precise edge detection and stable duty cycle accuracy during rapid air gap changes. Its differential Hall elements (E1/E2) reject common-mode stray fields while measuring BDIFF(pk-pk) up to 750 G across –40°C to +150°C.
It uses a two-wire current-source interface with low-current (ICC(LOW): 5.9–8 mA) and high-current (ICC(HIGH): 12–16 mA) states, ASIL warning pulses (63–121 μs), and ASIL critical pulses (4–8 ms), all referenced to VCC and GND pins without external biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temperature | –40°C to +150°C: Validated for under-hood automotive transmission environments without derating at TA ≤ 125°C. |
| Supply Voltage Range | 4 V to 24 V: Supports wide automotive battery range; undervoltage lockout at 3.6–3.95 V prevents erratic startup. |
| Output Frequency | Up to 12 kHz: Enables real-time gear ratio and shaft speed measurement in 8- and 10-speed automatic transmissions. |
| Differential Magnetic Input | ±750 G operating range, 20 G pk-pk minimum: Compatible with ferrite, neodymium, and samarium cobalt magnets per variant suffix. |
| Integrated Capacitor | 10 nF between pins 1 and 2: Eliminates need for external EMC filter capacitor in PCB layout. |
| ASIL Compliance | Hardware SEooC with ASIL B capability per ISO 26262: Requires safety manual integration but enables use in safety-related TCU functions. |
| Thermal Resistance | RθJA = 213°C/W on single-layer PCB: Enables thermal validation for junction temperature < 165°C under worst-case 24 V/16 mA operation. |
Pinout & Package
The A19420LUBBTN-G is housed in a lead-free, tin-plated 2-pin SIP (suffix UB) overmolded package with molded lead-stabilizing bar. Dimensions: 18.00 ±0.10 mm length × 4.00 ±0.06 mm width × 1.80 ±0.10 mm height; active area depth 0.38 ±0.03 mm; branded face orientation defined per Figure 10.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply Voltage Input | Pin 1 accepts 4–24 V DC; powers internal regulator, analog/digital blocks, and output driver; includes 28 V Zener clamp. |
| GND | Ground Reference | Pin 2 serves as return path for supply current and output current; forms current-loop output with VCC via external RL. |
Key Features
| Feature | Design Value |
|---|---|
| Differential Hall Sensing | Rejects common-mode magnetic interference from adjacent solenoids or motors, ensuring robust signal integrity in dense transmission ECU layouts. |
| SolidSpeed Digital Architecture | Maintains pitch and duty cycle accuracy during ±0.5 mm dynamic air gap shifts-critical for clutch engagement/disengagement transients. |
| Two-Wire ASIL Error Reporting | Embeds fault diagnostics (warning/critical pulses) into same current-loop output used for speed data-no extra wires or pins required. |
| Integrated 10 nF EMC Capacitor | Reduces board-level filtering components by >1 part, simplifying layout and improving radiated emissions compliance in CISPR 25 Class 5 systems. |
| EEPROM Traceability | Stores manufacturing lot, date code, and assembly data for full lifecycle tracking-required for ASIL B production traceability audits. |
Applications
| Automatic Transmission Speed Sensing | Electric Powertrain Motor Position |
|---|---|
Use Scenario: Monitoring input shaft rotation in 8-speed planetary gearsets to enable adaptive shift scheduling and torque converter lockup control. IC Role / Device Role / Timing Role: Differential Hall-effect speed sensor providing edge-accurate timing signals to TCU microcontroller via two-wire current loop. Use Value: Delivers 12 kHz maximum output frequency and <1.5× TCYCLE first-edge latency after power-on-enabling sub-10 ms gear change response. | Use Scenario: Measuring rotor position in traction motor inverters for field-oriented control (FOC) in hybrid electric vehicle (HEV) powertrains. IC Role / Device Role / Timing Role: High-immunity magnetic encoder interface delivering synchronized speed edges to inverter gate driver logic. Use Value: Maintains stable switching thresholds across –40°C to +150°C and rejects stray fields from nearby IGBTs-reducing position estimation error to <0.5° electrical. |
| CVT Ratio Control Sensor | Electromechanical Brake Actuator Feedback |
Use Scenario: Detecting pulley rotation in continuously variable transmissions to calculate real-time ratio and optimize engine load mapping. IC Role / Device Role / Timing Role: Ring magnet–coupled speed transducer feeding closed-loop ratio control algorithm in CVT ECU. Use Value: Achieves ±30% BDIFF(pk-pk) variation tolerance within 3× TCYCLE window-ensuring no missed transitions during rapid ratio sweeps. | Use Scenario: Providing wheel speed feedback to brake-by-wire ECUs for anti-lock braking (ABS) and electronic stability control (ESC) functions. IC Role / Device Role / Timing Role: Safety-certified speed sensor delivering ASIL B–compliant output with embedded fault signaling for fail-operational braking. Use Value: Generates ASIL warning pulses (63–121 μs) on detected signal anomalies-enabling <50 ms diagnostic response time per ISO 26262 ASIL B requirements. |
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 differential noise rejection and ASIL B compliance; requires external RC filter | Use where cost sensitivity outweighs EMI robustness and safety certification needs. |
| TLV4961-1K | Two-wire current output, no EEPROM, no ASIL classification, 8 kHz max frequency | Not qualified per ISO 26262; lacks diagnostic pulse protocol and thermal compensation for neodymium magnets | Select only for non-safety-critical auxiliary speed monitoring in cabin or HVAC subsystems. |
Compared with ATS684LSN-T and TLV4961-1K, the A19420LUBBTN-G uniquely combines differential sensing, integrated EMC capacitance, ASIL B SEooC certification, and SolidSpeed air gap compensation-making it the only option qualified for primary transmission speed sensing in ASIL B–rated TCUs.
Availability
A19420LUBBTN-G is available at Aetrix Electronics and suitable for automatic transmission control units, electric powertrain inverters, and electromechanical brake actuators requiring stable component supply across extended automotive temperature ranges and long production lifecycles.
Supply support for A19420LUBBTN-G 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, with global automotive qualification expertise.
The A19420 product line delivers ASIL B–certified, differential Hall-effect speed sensors optimized for transmission, e-powertrain, and brake actuation systems where air gap stability and magnetic immunity are critical.
FAQ
What is the operating temperature range of the A19420LUBBTN-G?
The A19420LUBBTN-G is rated for –40°C to +150°C ambient operation, validated across full specification limits including supply current, output timing, and magnetic sensitivity. This range supports direct mounting on transmission housings and powertrain control modules without heatsinking, provided junction temperature remains below 165°C per thermal derating curves in the datasheet.
Does the A19420LUBBTN-G require an external capacitor for EMC compliance?
No-the A19420LUBBTN-G integrates a 10 nF capacitor internally between pins 1 (VCC) and 2 (GND), eliminating the need for external filtering components. This reduces PCB footprint, lowers BOM count, and ensures consistent EMC performance across production lots without layout-dependent tuning.
How does the A19420LUBBTN-G support ASIL B compliance in automotive systems?
The A19420LUBBTN-G is developed as a hardware safety element out-of-context (SEooC) per ISO 26262 with ASIL B capability. It includes continuous internal diagnostics, ASIL warning and critical error pulses, EEPROM traceability, and documented failure modes-enabling integration into safety-related transmission control units when used per the safety manual and system-level FMEDA analysis.
What target types are compatible with the A19420LUBBTN-G?
The A19420LUBBTN-G directly senses ring magnets and, when back-biased with a samarium cobalt (–G) or ferrite/neodymium (–E) magnet, detects ferrous gear teeth. Its differential architecture rejects stray fields, making it suitable for noisy environments like transmission valve bodies or motor stators where adjacent actuators generate interference.
What is the maximum output frequency supported by the A19420LUBBTN-G?
The A19420LUBBTN-G supports up to 12 kHz output frequency under sinusoidal magnetic input conditions, corresponding to ~720,000 RPM for a 1000-pole ring magnet. This enables high-resolution speed measurement in modern multi-speed automatic and dual-clutch transmissions where fast transient response is required for shift quality control.
A19420LUBBTN-G 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-G FAQ
1.How can I place an order for A19420LUBBTN-G through Aetrix?
Please submit a Request for Quotation (RFQ) for A19420LUBBTN-G 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-G reliable?
The price and inventory of A19420LUBBTN-G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A19420LUBBTN-G is usually 5 days.
3.What payment methods are accepted for A19420LUBBTN-G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A19420LUBBTN-G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A19420LUBBTN-G?
A19420LUBBTN-G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A19420LUBBTN-G 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-G?
For technical support, including A19420LUBBTN-G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A19420LUBBTN-G requirements.
6.How does Aetrix verify that A19420LUBBTN-G is sourced from the original manufacturer or authorized distributors?
All A19420LUBBTN-G 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-G meets industry standards.
7.What is the process for return or replacement of A19420LUBBTN-G?
All A19420LUBBTN-G units undergo pre-shipment inspection (PSI). If there is an issue with A19420LUBBTN-G, 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-G part is unused and in its original packaging.
Return procedure for A19420LUBBTN-G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
A19420LUBBTN-G 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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