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Allegro MicroSystems A1342LUCTN-T
- Part No.:
- A1342LUCTN-T
- Manufacturer:
- Allegro MicroSystems
- Category:
- Linear, Compass (ICs)
- Package:
- 3-SIP
- Datasheet:
-
A1342LUCTN-T.pdf
- Description:
- SENSOR HALL EFFECT ANALOG 3SIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,516
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Product details
Overview
A1342LUCTN-T from Allegro MicroSystems is a programmable linear Hall-effect IC with open-drain output, designed for high-precision magnetic field sensing in automotive safety-critical systems. It delivers ±1500 G input field range, 12-bit output resolution, 16-segment EEPROM-based linearization, AEC-Q100 qualification, and SENT/PWM digital output protocols.
For engineers reviewing the A1342LUCTN-T datasheet, A1342LUCTN-T pinout, A1342LUCTN-T application, or A1342LUCTN-T equivalent, this page provides verified technical context, real-world diagnostic capabilities (coil-based BIST, LBIST, fault monitors), configurable temperature compensation (1st/2nd order sensitivity & 1st order offset), and production-ready packaging in 3-pin SIP (UC).
Technical Context
The A1342LUCTN-T implements a BiCMOS monolithic architecture integrating Hall plates with integrated feedback coils, 4-phase chopper stabilization, and a 16-bit high-update-rate ADC. Its signal path includes factory-configurable multisegment temperature compensation and customer-programmable 16-segment linearization stored in SECDED-protected EEPROM.
Digital diagnostics include active front-end stimulation via internal magnetic coil for full data-path validation, on-demand Logic Built-In Self Test (LBIST), and configurable fault monitors for overvoltage, undervoltage, overtemperature, magnetic field out-of-range, and broken-wire detection - all supporting ASIL-compliant system design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5–5.5 V - supports stable operation across automotive battery transients |
| Input Field Range | ±1500 G - enables robust sensing in high-field motor and transmission applications |
| Output Resolution | 12-bit - provides fine-grained position or current measurement granularity |
| Bandwidth | Up to 7.4 kHz - selectable via bw_sel_c register for speed-sensitive throttle or pedal sensing |
| Temperature Range | −40°C to +150°C - qualified for under-hood and powertrain environments |
| Linearization | 16-segment, EEPROM-stored - corrects nonlinear magnet geometry without external calibration |
| Diagnostics | Coil-based BIST + LBIST + 5 fault monitors - enables end-to-end functional safety validation per ISO 26262 |
Pinout & Package
Package: 3-pin through-hole SIP (suffix UC), Pb-free, 100% matte-tin leadframe plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Power supply input | Accepts 4.5–5.5 V; includes internal zener clamp (20 V) and undervoltage/overvoltage detection |
| 2 - GND | Ground reference | Return path for supply and output; supports broken-ground detection diagnostics |
| 3 - VOUT | Open-drain digital output | Configurable SENT/PWM output; internal 1.5 nF load capacitor; supports pull-up to 20 V |
Key Features
| Feature | Design Value |
|---|---|
| 16-segment linearization | EEPROM-programmable coefficients correct nonlinearity from magnet geometry or air gap variation |
| Integrated feedback coil | Compensates for lifetime drift and package hysteresis - <±1.5% lifetime sensitivity drift |
| Proprietary SSENT/ASENT | Enables up to 4 A1342LUCTN-T devices on one SENT line - reduces wiring cost and ECU pin count |
| Programmable fall time | Adjusts output driver slew rate to optimize EMC performance in noisy automotive environments |
| SECDED EEPROM | Single Error Correction / Double Error Detection ensures reliable configuration storage over 15+ year lifetime |
Applications
| Electric Power Steering (EPS) | Brake Pedal Position Sensing |
|---|---|
Use Scenario: Real-time angular position feedback of steering column torque sensor within EPS control loop. IC Role / Device Role / Timing Role: Linear Hall sensor providing analog-equivalent 12-bit position data via SENT protocol with <150 µs response time at max bandwidth. Use Value: Enables precise motor assist control with integrated diagnostics (broken wire, field out-of-range) meeting ASIL-B requirements. |
Use Scenario: Dual-redundant pedal travel measurement for brake-by-wire systems. IC Role / Device Role / Timing Role: Safety-critical magnetic position sensor delivering fault-flagged SENT output with coil-based BIST validation. Use Value: Supports dual-channel comparison architecture with <±0.5% FSO integral nonlinearity and lifetime drift <±1.5%. |
| Transmission Gear Selector | Throttle Valve Position |
Use Scenario: Contactless gear position detection in automatic transmission shift-by-wire modules. IC Role / Device Role / Timing Role: High-temperature (−40°C to +150°C) linear Hall IC with rail-to-rail offset configurability and 16-segment linearization. Use Value: Eliminates mechanical wear and hysteresis; accommodates magnet misalignment via field-range flexibility (±1500 G). |
Use Scenario: Accurate throttle plate angle measurement in gasoline direct injection engines. IC Role / Device Role / Timing Role: Programmable Hall sensor with 1st/2nd order temperature compensation and post-linearization trim. Use Value: Maintains <±1.5% sensitivity drift over −40°C to +150°C with coil compensation enabled. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear Hall sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Melexis MLX90393 | Triaxis Hall with I²C/SPI interface; no SENT/PWM; 16-bit resolution; lacks integrated coil-based BIST | Better suited for PCB-mounted multi-axis sensing; not AEC-Q100 grade 0 qualified | Select when triaxial field measurement and flexible digital interface outweigh need for automotive SENT bus integration |
| Allegro A1324LLHLT-T | Analog-output-only (ratiometric); no EEPROM, no linearization, no diagnostics; 5 V fixed supply; 3-pin SOT-23 | Limited to non-safety-critical analog sensing; no ASIL support or programmability | Select only for cost-sensitive, non-automotive applications requiring basic linear Hall output without diagnostics or digital protocols |
Compared with MLX90393 and A1324LLHLT-T, the A1342LUCTN-T uniquely combines SENT/PWM digital output, EEPROM-based 16-segment linearization, coil-compensated lifetime stability, and ASIL-targeted diagnostics - making it the only option qualified for production automotive safety-critical position sensing.
Availability
A1342LUCTN-T is available at Aetrix Electronics and suitable for electric power steering, brake-by-wire, transmission gear selector, and throttle valve position applications requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant traceability.
Supply support for A1342LUCTN-T 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 sensors and power ICs, founded in 1989 and headquartered in Manchester, NH.
The A1342 product line is engineered specifically for ASIL-B/C automotive safety applications - emphasizing field-programmable accuracy, lifetime stability, and integrated diagnostics to reduce system-level validation burden.
FAQ
What output protocols does the A1342LUCTN-T support?
The A1342LUCTN-T supports PWM and SENT digital output protocols. In addition to standard SAE J2716 SENT, it implements two proprietary variants: SSENT (Sequential SENT) and ASENT (Addressable SENT), enabling up to four A1342LUCTN-T devices on a single SENT line while maintaining individual diagnostic access and high bandwidth.
How is linearization implemented in the A1342LUCTN-T?
The A1342LUCTN-T uses 16-segment piecewise-linearization with 17 programmable breakpoints stored in EEPROM. Each segment applies a unique coefficient; x-coordinates are customer-programmable, y-coordinates are fixed and equally spaced. The algorithm supports both interpolation (Lin Mode) and binning (Bin Mode), allowing correction of nonlinear magnet fields or creation of threshold-based switching behavior.
Does the A1342LUCTN-T include built-in diagnostics for functional safety?
Yes, the A1342LUCTN-T integrates multiple ASIL-targeted diagnostics: active front-end stimulation using an internal magnetic coil for transistor-level validation, on-demand Logic Built-In Self Test (LBIST), and configurable fault monitors for overvoltage, undervoltage, overtemperature, magnetic field out-of-range, and broken-wire detection - all supporting ISO 26262 compliance workflows.
What is the operating temperature range and qualification status of the A1342LUCTN-T?
The A1342LUCTN-T is qualified to AEC-Q100 Grade 0 (−40°C to +150°C ambient), with junction temperature rated up to +165°C. It features factory-configured multisegment temperature compensation and customer-programmable 1st/2nd order sensitivity and 1st order offset compensation - ensuring stable performance across its full automotive operating range.
Can the A1342LUCTN-T be programmed in-system?
Yes, the A1342LUCTN-T supports in-application programming via its serial interface without requiring external high-voltage supplies. An integrated charge pump enables EEPROM writes at standard VCC (4.5–5.5 V). Configuration parameters - including linearization coefficients, temperature compensation, clamps, and output protocols - are stored in SECDED-protected memory for reliability over 15+ years.
A1342LUCTN-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Package/Case:
- 3-SIP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Hall Effect
- Axis:
- Single
- Output Type:
- Analog Voltage
- Sensing Range:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Supply (Max):
- 16mA
- Current - Output (Max):
- 50mA
- Resolution:
- -
- Bandwidth:
- -
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Features:
- -
- Supplier Device Package:
- 3-SIP
- Mounting Type:
- Through Hole
A1342LUCTN-T FAQ
1.How can I place an order for A1342LUCTN-T through Aetrix?
Please submit a Request for Quotation (RFQ) for A1342LUCTN-T 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 A1342LUCTN-T reliable?
The price and inventory of A1342LUCTN-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A1342LUCTN-T is usually 5 days.
3.What payment methods are accepted for A1342LUCTN-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A1342LUCTN-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A1342LUCTN-T?
A1342LUCTN-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A1342LUCTN-T 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 A1342LUCTN-T?
For technical support, including A1342LUCTN-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A1342LUCTN-T requirements.
6.How does Aetrix verify that A1342LUCTN-T is sourced from the original manufacturer or authorized distributors?
All A1342LUCTN-T 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 A1342LUCTN-T meets industry standards.
7.What is the process for return or replacement of A1342LUCTN-T?
All A1342LUCTN-T units undergo pre-shipment inspection (PSI). If there is an issue with A1342LUCTN-T, 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 A1342LUCTN-T part is unused and in its original packaging.
Return procedure for A1342LUCTN-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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