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NXP Semiconductors MMA6519KCWR2
- Part No.:
- MMA6519KCWR2
- Manufacturer:
- NXP Semiconductors
- Category:
- Accelerometers
- Package:
- 16-QFN Exposed Pad
- Datasheet:
-
MMA6519KCWR2.pdf
- Description:
- ACCELEROMETER 80G SPI 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,581
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Product details
Overview
MMA6519KCWR2 from NXP Semiconductors is a dual-axis, SPI-based, over-damped lateral accelerometer with ±80 g full-scale range on both X and Y axes, 12-bit digital output, and AEC-Q100 qualified for automotive airbag deployment systems. It operates from 3.3 V or 5 V supply, features twelve programmable low-pass filter options (50–1000 Hz), and supports independent arming functions per axis.
For engineers reviewing the MMA6519KCWR2 datasheet, MMA6519KCWR2 pinout, MMA6519KCWR2 application, or MMA6519KCWR2 equivalent, this page delivers verified technical context, exact pin functionality, automotive-grade reliability data, and real-world airbag system integration guidance - not generic sensor descriptions.
Technical Context
The MMA6519KCWR2 integrates two over-damped MEMS g-cells with natural frequency of 10.8–15.9 kHz and damping ratio of 2.46–9.36, enabling stable response under high-shock conditions. Its signal chain includes ΣΔ ADCs, configurable SINC + IIR low-pass filters (4-pole or 3-pole), and offset cancellation with 6.29 s averaging period and <0.25 LSB/s slew rate.
Digital interface compliance includes SPI clock timing (min 120 ns period), CS-to-MISO access ≤60 ns, and CRC-protected register arrays. Arming outputs (ARM_X/ARM_Y) support open-drain active-low/high configuration or PCM-mode acceleration-proportional digital output, directly usable in crash decision logic without external processing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Full-Scale Range | ±80 g on both X and Y axes - enables precise crash pulse detection within airbag deployment thresholds. |
| Digital Output Resolution | 12-bit signed or unsigned SPI output - provides 4096-level quantization for sub-g acceleration discrimination. |
| Supply Voltage | 3.3 V or 5.0 V single supply - compatible with legacy automotive 5 V domains and modern 3.3 V microcontroller interfaces. |
| Low-Pass Filter Options | Twelve selectable cutoff frequencies (50–1000 Hz) - allows tuning to match vehicle-specific crash pulse bandwidths. |
| Offset Cancellation | 6.29 s averaging period, <0.25 LSB/s slew rate - eliminates thermal drift without compromising real-time crash response. |
| Shock Survival Rating | ±1500 g powered, ±2000 g unpowered - meets automotive mechanical robustness requirements for under-hood and passenger compartment mounting. |
| AEC-Q100 Qualification | Grade 2 (−40 °C to +105 °C ambient) - validated for continuous operation in safety-critical airbag control units. |
Pinout & Package
Pb-free 16-pin QFN package, 6 mm × 6 mm × 1.98 mm, with exposed die attach pad internally connected to VSS. Pin 17 (PAD) is the thermal ground flag; corner pads are internally tied to VSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREGA | Analog supply input | Provides regulated 2.5 V for analog front-end; requires 1 μF decoupling capacitor to VSSA. |
| VSS, VSSA | Digital and analog ground | Separate ground returns prevent noise coupling between digital logic and sensitive analog sensing paths. |
| ARM_X / ARM_Y | Configurable arming output | Open-drain output with programmable polarity; asserts within 1.51 μs in unfiltered mode for immediate crash event signaling. |
| SCLK / MOSI / MISO / CS | SPI interface signals | Full-duplex SPI compliant with tSCLK ≥120 ns, tACCESS ≤60 ns, and CRC-protected register reads/writes. |
| TEST/VPP | Factory programming voltage | Must be tied to VSS in application; not used during normal operation or field programming. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-axis independent arming | Enables separate crash detection logic per axis - critical for multi-directional impact classification in side-impact and rollover algorithms. |
| Twelve low-pass filter configurations | Allows matching filter bandwidth to vehicle-specific crash pulse profiles (e.g., 100 Hz for slow-ramp frontal, 500 Hz for high-speed side-impact). |
| Offset cancellation with >6 s averaging | Stabilizes zero-g baseline across temperature and aging while maintaining <0.25 LSB/s drift - avoids false triggers during long-term vehicle storage. |
| Self-test with stored deflection values | Factory-trimmed STDEFL_X/Y registers enable automated in-system verification against ΔSTACC ±10% accuracy bound - required for ISO 26262 ASIL-B diagnostics. |
| AEC-Q100 Grade 2 qualification | Validated for −40 °C to +105 °C operation with 100% final test coverage - ensures reliability in engine bay and dashboard-mounted airbag controllers. |
Applications
| Frontal Collision Detection | Side-Impact Sensing |
|---|---|
Use Scenario: Detects rapid deceleration during head-on collisions to trigger driver/passenger airbag inflation within 20 ms. IC Role / Device Role / Timing Role: Primary crash sensor feeding acceleration data to airbag control unit (ACU); outputs valid SPI data within 36.5 μs latency (LPF=0). Use Value: ±80 g range and 400 Hz LPF option capture full crash pulse envelope without clipping; 12-bit resolution enables accurate pulse shape analysis for deployment staging. | Use Scenario: Mounted in door or B-pillar to sense lateral acceleration during T-bone or side-swipe impacts. IC Role / Device Role / Timing Role: Dual-axis lateral sensor providing independent X/Y acceleration streams; ARM_Y asserts within 1.51 μs for immediate side-airbag trigger. Use Value: Independent arming per axis allows directional discrimination; over-damped g-cell design prevents resonance artifacts at 10.8–15.9 kHz that could corrupt side-impact signature. |
| Rollover Detection | Seatbelt Pretensioner Activation |
Use Scenario: Monitors sustained lateral acceleration and angular rate proxy during vehicle roll events to deploy curtain airbags before roof contact. IC Role / Device Role / Timing Role: Secondary inertial sensor in rollover algorithm; uses 50 Hz LPF (cutoff 8) to reject high-frequency road noise while preserving roll onset signature. Use Value: Twelve LPF options allow optimization for low-bandwidth rollover detection; offset cancellation maintains baseline stability during prolonged cornering maneuvers. | Use Scenario: Triggers pyrotechnic seatbelt pretensioners upon detecting pre-crash braking followed by impact acceleration. IC Role / Device Role / Timing Role: Input to pretensioner control logic; ARM_X configured as open-drain active-high output directly drives external MOSFET gate. Use Value: Programmable arming polarity and pulldown/pullup current (50–100 μA) enable direct interface to discrete driver stages without level-shifting components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-axis automotive accelerometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMA6525KCWR2 | ±105 g full-scale range per axis; identical pinout, package, and SPI interface. | Higher range suits heavy-vehicle or high-speed crash testing where ±80 g may saturate. | Select when crash pulse modeling predicts peak acceleration >70 g; retains same layout and firmware interface. |
| ADXL312WBRMZ-RL | 3-axis, 13-bit output, I²C/SPI interface; ±18 g range; not AEC-Q100 qualified. | Lacks automotive qualification and dual-axis independent arming; suited for non-safety prototyping only. | Use only for bench validation; not suitable for production airbag systems due to missing AEC-Q100 Grade 2 and SafeAssure certification. |
Compared with MMA6525KCWR2, the MMA6519KCWR2 offers tighter range resolution (24.0 LSB/g vs 18.2 LSB/g) for improved low-g sensitivity in pedestrian impact detection, while ADXL312WBRMZ-RL lacks the functional safety architecture, arming outputs, and qualification needed for ASIL-B airbag deployment.
Availability
MMA6519KCWR2 is available at Aetrix Electronics and suitable for automotive airbag control units, rollover detection modules, and seatbelt pretensioner systems requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.
Supply support for MMA6519KCWR2 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
NXP Semiconductors is a global semiconductor leader focused on automotive, industrial, and IoT applications, with deep expertise in safety-critical embedded systems and functional safety certification.
The MMA65xx family is designed specifically for automotive occupant restraint systems, delivering SafeAssure-certified accelerometers with integrated arming logic, diagnostic coverage, and AEC-Q100 Grade 2 reliability for airbag deployment decisions.
FAQ
What is the full-scale range of the MMA6519KCWR2?
The MMA6519KCWR2 has a ±80 g full-scale range on both the X and Y axes. This range is factory-configured and confirmed in the ordering information table of the datasheet. The device delivers 24.0 LSB/g sensitivity in 12-bit unsigned mode, enabling precise measurement of crash pulses below 1 g while retaining headroom up to 80 g without saturation. This range is optimized for passenger vehicle frontal and side-impact detection.
Does the MMA6519KCWR2 support independent arming functions per axis?
Yes, the MMA6519KCWR2 supports independent arming functions via dedicated ARM_X and ARM_Y pins. Each pin can be configured through DEVCFG register bits as an open-drain active-low or active-high output, or as a PCM-mode digital output proportional to acceleration. Activation delay is as low as 1.51 μs in unfiltered mode, making it suitable for time-critical airbag deployment decisions where axis-specific triggering is required.
What low-pass filter options does the MMA6519KCWR2 provide?
The MMA6519KCWR2 offers twelve programmable low-pass filter options: six at 8 μs interpolation interval (100–1000 Hz) and six at 16 μs interval (50–500 Hz), all implemented as 4-pole or 3-pole IIR filters. Cutoff frequencies include 50 Hz, 100 Hz, 150 Hz, 200 Hz, 300 Hz, 400 Hz, 500 Hz, 800 Hz, and 1000 Hz. These are selected via LPF_X[3:0] and LPF_Y[3:0] bits in DEVCFG_X/Y registers.
Is the MMA6519KCWR2 qualified for automotive safety applications?
Yes, the MMA6519KCWR2 is AEC-Q100 qualified (Grade 2, −40 °C to +105 °C) and part of NXP's SafeAssure solution portfolio. It includes built-in diagnostics such as CRC-protected registers, self-test with factory-stored deflection values, offset monitoring, and power supply voltage supervision - all required for ASIL-B compliance in airbag control units per ISO 26262.
What package type and dimensions does the MMA6519KCWR2 use?
The MMA6519KCWR2 uses a Pb-free 16-pin QFN package with dimensions 6 mm × 6 mm × 1.98 mm (98ASA00690D). It features an exposed die attach pad internally connected to VSS for thermal dissipation. Pin 17 (PAD) and corner pads are electrically tied to VSS, and the package is compatible with standard reflow soldering profiles for automotive PCB assembly.
MMA6519KCWR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- MMA
- Package/Case:
- 16-QFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Digital
- Axis:
- X, Y
- Acceleration Range:
- ±80g
- Sensitivity (LSB/g):
- 24
- Sensitivity (mV/g):
- -
- Bandwidth:
- -
- Output Type:
- SPI
- Voltage - Supply:
- 3.135V ~ 5.25V
- Features:
- Selectable Low Pass Filter
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (6x6)
MMA6519KCWR2 FAQ
1.How can I place an order for MMA6519KCWR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMA6519KCWR2 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 MMA6519KCWR2 reliable?
The price and inventory of MMA6519KCWR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMA6519KCWR2 is usually 5 days.
3.What payment methods are accepted for MMA6519KCWR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMA6519KCWR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMA6519KCWR2?
MMA6519KCWR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMA6519KCWR2 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 MMA6519KCWR2?
For technical support, including MMA6519KCWR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMA6519KCWR2 requirements.
6.How does Aetrix verify that MMA6519KCWR2 is sourced from the original manufacturer or authorized distributors?
All MMA6519KCWR2 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 MMA6519KCWR2 meets industry standards.
7.What is the process for return or replacement of MMA6519KCWR2?
All MMA6519KCWR2 units undergo pre-shipment inspection (PSI). If there is an issue with MMA6519KCWR2, 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 MMA6519KCWR2 part is unused and in its original packaging.
Return procedure for MMA6519KCWR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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