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Microchip Technology ATA664151-WNQW
- Part No.:
- ATA664151-WNQW
- Manufacturer:
- Microchip Technology
- Category:
- Specialized
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
ATA664151-WNQW.pdf
- Description:
- IC INTERFACE SPECIALIZED 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,331
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Product details
Overview
ATA664151-WNQW from Microchip Technology (formerly Atmel) is an automotive-grade LIN System Basis Chip integrating a LIN 2.1/SAE J2602-2 transceiver, 5V/80mA low-drop regulator, adjustable window watchdog, and eight-channel HV switch interface with current sources. It supports both master and slave LIN node operation, operates from 5V to 27V supply, and delivers <35µA active low-power mode current - enabling robust, low-cost convenience electronics nodes in vehicles.
For engineers reviewing the ATA664151-WNQW datasheet, ATA664151-WNQW pinout, ATA664151-WNQW application, or ATA664151-WNQW equivalent, key selection considerations include LIN high-speed mode up to 200kBit/s, VBATT-sensing capability via internal voltage divider (±2%), daisy-chainable 16-bit SPI configuration, and HV switch I/O with configurable current sourcing/sinking on CS1–CS3.
Technical Context
The ATA664151-WNQW implements a dual-mode LIN physical layer supporting standard (20kBaud) and high-speed (200kBit/s) modes via slope control disable (LSME bit), with bus protection against ±30V to +40V faults and thermal shutdown. Its 8-channel HV switch interface includes three bidirectional (CS1–CS3) and five unidirectional (CS4–CS8) current-source I/Os, each with analog voltage sensing capability via VDIV routing.
Operation spans three power states: Sleep mode (<8µA), Active low-power mode (<35µA with VCC enabled and peripherals disabled), and full Active mode with configurable peripheral enablement via SPI register bits (LINE, WDD, VDIVE, CSEx). Wake-up is supported via LIN bus edge detection or CL15 ignition input with 160µs debounce.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LIN Compliance | LIN 2.1 and SAE J2602-2 compliant physical layer; interoperable with LIN 1.x nodes |
| Supply Range (VS) | 5V to 27V operating voltage; undervoltage lockout at ~3.3V prevents false bus messages |
| VCC Regulator | 5.0V ±2% output, 80mA max load; includes overcurrent and overtemperature protection |
| HV Switch Channels | 8 total: CS1–CS3 support sink/source; CS4–CS8 source-only; all support analog voltage monitoring |
| SPI Interface | 16-bit daisy-chainable serial interface for configuration, diagnosis, and status readback |
| Watchdog | Adjustable window watchdog via external resistor on WDOSC; trigger via NTRIG falling edge |
| Current Consumption | Typ. 8µA in Sleep mode; typ. 35µA in Active low-power mode (VCC on, peripherals off) |
Pinout & Package
Package: QFN32, 5×5mm, exposed thermal pad (internally connected to GND).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| TXD / RXD | LIN logic interface | Microcontroller-to-LIN PHY data path: TXD drives bus dominant/recessive; RXD reports bus state with push-pull output |
| NRES | Reset output | Open-drain active-low reset combining VCC undervoltage detection (4ms hold time) and watchdog failure |
| NIRQ | Interrupt request | Open-drain active-low signal indicating wake-up (LIN/CL15), switch change, or overtemperature event |
| CS1–CS8 | HV I/O terminals | Eight high-voltage pins: CS1–CS3 configurable as current sink/source; CS4–CS8 current-source only; all support contact monitoring and analog voltage sensing via VDIV |
| VDIV | Voltage divider output / watchdog control | Provides scaled VBATT or CSx voltage for microcontroller ADC; also sets WDD bit during power-up reset |
| WDOSC / NTRIG | Watchdog timing interface | WDOSC supplies 1.2V reference for external resistor to set watchdog frequency; NTRIG accepts falling-edge trigger with minimum pulse width |
Key Features
| Feature | Design Value |
|---|---|
| LIN High-Speed Mode | Up to 200kBit/s via LSME bit disable - enables ECU programming and diagnostic data download without external hardware changes |
| VBATT Sensing | Integrated 1:4 voltage divider (±2% accuracy) on VBATT pin feeds VDIV, eliminating external resistors for battery monitoring |
| Wake-up Flexibility | Dual wake-up paths: LIN bus edge detection (with pre-wake threshold) and CL15 ignition input (160µs debounced) - supports local and remote activation |
| HV Switch Diagnostics | All CSx pins support interrupt-on-change and analog voltage measurement - enables real-time switch state verification and fault detection in active low-power mode |
| EMC-Optimized LIN Driver | Slope-controlled LIN output ensures secure communication up to 20kBaud; slope disable option trades EMC for speed at 200kBit/s |
Applications
| Body Control Module (BCM) | Roof Module (Sunroof/Windows) |
|---|---|
Use Scenario: Centralized control of door locks, interior lighting, and mirror adjustments via LIN network. IC Role / Device Role / Timing Role: ATA664151-WNQW serves as LIN slave node with integrated 5V regulator powering MCU and HV switches driving solenoids/LEDs. Use Value: Eliminates discrete LDO, transceiver, and high-side drivers - reduces BOM count by ≥7 components while maintaining ±2% VBATT sensing for low-battery alerts. | Use Scenario: Sunroof position control and pinch detection using multi-point switch inputs and PWM-driven motor drivers. IC Role / Device Role / Timing Role: ATA664151-WNQW acts as LIN slave with CS1–CS3 configured as current sinks for switch matrix scanning and CS4–CS8 sourcing PWM to motor H-bridge enable lines. Use Value: Enables precise switch-state polling in Active low-power mode (<35µA), extending module sleep duration without sacrificing responsiveness to sunroof obstruction events. |
| Seat Control Unit | Climate Control Panel |
Use Scenario: Monitoring seat occupancy sensors and controlling lumbar/heat actuators across multiple LIN slaves. IC Role / Device Role / Timing Role: ATA664151-WNQW functions as LIN master node with integrated transceiver, regulator, and 8-channel HV interface managing seat switch inputs and heater relay drivers. Use Value: Single-chip solution supports both LIN master and slave roles - avoids separate master PHY and level-shifting circuitry while delivering 80mA VCC for dual-core MCU operation. | Use Scenario: Reading HVAC panel buttons and driving indicator LEDs/fans via LIN-connected cabin controller. IC Role / Device Role / Timing Role: ATA664151-WNQW operates as LIN slave with VDIV used for analog button voltage reading and CSx pins sourcing current to LED anodes and fan enable lines. Use Value: Integrates analog front-end (via VDIV) and digital I/O (CSx) into one package - removes need for external ADC and high-side switches, simplifying 4-layer PCB layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LIN system basis chip applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLIN1029-Q1 | Single-channel HV driver; no integrated VCC regulator or watchdog; requires external 5V supply | Limited to basic LIN transceiver + single switch; not suitable for multi-load or self-powered nodes | Select when only LIN PHY + one HV load is needed and board space allows external LDO |
| MC33816 | Includes CAN interface; 3.3V regulator; no LIN high-speed mode; different SPI command set | Better for mixed CAN/LIN gateways; lacks ATA664151-WNQW's 200kBit/s LIN capability and 8-channel HV flexibility | Prefer for vehicle networks requiring CAN diagnostics alongside LIN, but avoid if LIN speed >20kBaud or 8-switch monitoring is required |
Compared with TLIN1029-Q1 and MC33816, the ATA664151-WNQW uniquely combines LIN 2.1 compliance, 8-channel HV switching, integrated 5V/80mA regulation, and 200kBit/s high-speed mode - making it optimal for cost-sensitive, space-constrained LIN slave nodes requiring comprehensive power and I/O integration.
Availability
ATA664151-WNQW is available at Aetrix Electronics and suitable for body control modules, roof modules, seat control units, climate panels, and LIN-based convenience electronics requiring stable component supply across automotive production lifecycles.
Supply support for ATA664151-WNQW 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
Microchip Technology is a global semiconductor company delivering smart, connected, and secure embedded control solutions.
The ATA664151-WNQW belongs to Microchip's automotive LIN System Basis Chip product line, engineered specifically for cost-effective, low-power LIN slave and master nodes in vehicle convenience electronics - emphasizing integration, diagnostics, and robustness in harsh 12V/24V environments.
FAQ
What LIN protocol versions does the ATA664151-WNQW support?
The ATA664151-WNQW implements a LIN 2.1 and SAE J2602-2 compliant physical layer, ensuring interoperability with all prior LIN versions (1.0–2.0) in mixed-node networks. Its LIN transceiver supports both standard (20kBaud) and high-speed (200kBit/s) modes, with slope control configurable via SPI bit LSME. Protocol layer handling remains with the external microcontroller - the ATA664151-WNQW provides only PHY-level signaling and bus protection.
How does the ATA664151-WNQW manage power consumption in vehicle sleep states?
The ATA664151-WNQW achieves ultra-low quiescent current via three defined states: Sleep mode draws <8µA with VCC regulator and all peripherals disabled; Active low-power mode consumes <35µA while supplying 5V to the MCU; and wake-up is supported via LIN bus edge detection or CL15 ignition input with 160µs debounce. During sleep, internal receiver monitoring minimizes current even under floating or shorted LIN bus conditions - critical for meeting automotive ISO 11898-2 and OEM battery drain requirements.
Can the ATA664151-WNQW drive both high-side and low-side loads?
Yes - the ATA664151-WNQW's eight HV switch channels provide flexible load driving: CS1, CS2, and CS3 are fully bidirectional, configurable as either current sinks (for low-side switching to GND) or current sources (for high-side switching to VS); CS4 through CS8 are current-source only, suited for high-side LED or relay driving. Each channel supports analog voltage monitoring via VDIV, enabling real-time load health checks without additional components.
What is the function of the VDIV pin on the ATA664151-WNQW beyond battery sensing?
On the ATA664151-WNQW, the VDIV pin serves a dual role: during power-up, it configures the watchdog disable (WDD) bit by its logic level at reset release; during normal operation, it outputs a temperature- and voltage-stable scaled voltage - either from VBATT (1:4 ratio) or from any selected CSx pin - for direct connection to a microcontroller's ADC. This eliminates external voltage dividers and enables simultaneous battery monitoring and HV switch voltage diagnostics using a single analog input.
Does the ATA664151-WNQW require external components for basic LIN operation?
The ATA664151-WNQW minimizes external components: only a 5V output capacitor (recommended 2.2µF ceramic), VBATT series resistor (51Ω) and decoupling cap (10nF), plus optional external resistor on WDOSC for watchdog tuning are required for full functionality. The LIN bus needs only an external pull-up (500Ω recommended for 200kBit/s) - the internal pull-up activates only in active mode. No external transceiver, LDO, or high-side drivers are needed, reducing typical BOM count by 7+ discrete parts versus discrete implementations.
ATA664151-WNQW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- -
- Interface:
- LIN
- Voltage - Supply:
- 5V ~ 27V
- Supplier Device Package:
- 32-VQFN (5x5)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
ATA664151-WNQW FAQ
1.How can I place an order for ATA664151-WNQW through Aetrix?
Please submit a Request for Quotation (RFQ) for ATA664151-WNQW 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 ATA664151-WNQW reliable?
The price and inventory of ATA664151-WNQW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATA664151-WNQW is usually 5 days.
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Once your ATA664151-WNQW 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 ATA664151-WNQW?
For technical support, including ATA664151-WNQW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATA664151-WNQW requirements.
6.How does Aetrix verify that ATA664151-WNQW is sourced from the original manufacturer or authorized distributors?
All ATA664151-WNQW 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 ATA664151-WNQW meets industry standards.
7.What is the process for return or replacement of ATA664151-WNQW?
All ATA664151-WNQW units undergo pre-shipment inspection (PSI). If there is an issue with ATA664151-WNQW, 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 ATA664151-WNQW part is unused and in its original packaging.
Return procedure for ATA664151-WNQW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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