NXP Semiconductors MMA6519KWR2

Overview

MMA6519KWR2 from NXP Semiconductors (formerly Freescale) is a dual-axis, SPI-interface, over-damped lateral accelerometer with ±80g full-scale range on both X and Y axes, 12-bit digital output, and AEC-Q100 Grade 1 qualification for automotive airbag deployment systems.

For engineers reviewing the MMA6519KWR2 datasheet, MMA6519KWR2 pinout, MMA6519KWR2 application, or MMA6519KWR2 equivalent, key selection criteria include its automotive-grade shock survivability (±2000g unpowered), programmable arming outputs per axis, twelve selectable low-pass filter options (50–1000 Hz), offset cancellation with <0.25 LSB/s slew rate, and Pb-free 16-pin QFN (6×6 mm) package.

Technical Context

The MMA6519KWR2 integrates two independent over-damped silicon MEMS g-cells with natural frequency of 10.8–15.9 kHz and damping ratio of 2.46–9.36, coupled to ΣΔ ADCs and configurable SINC/IIR digital filters. Its internal 8 MHz oscillator feeds programmable clock dividers to support DSP sample rates of 64/fOSC or 128/fOSC.

Each axis features independent register-controlled arming logic (open-drain ARM_X/ARM_Y), self-test activation with calibrated deflection values stored in OTP, and dual-mode offset correction-either automatic averaging (>6.29 s period) or manual register-based adjustment-with dedicated monitor thresholds (±100 LSB).

Key Specifications

Pinout & Package

Pb-free 16-pin QFN package, 6 mm × 6 mm, exposed die attach pad (internally connected to VSS), case number 2086-01.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-axis automotive accelerometer applications.

Compared with MMA6525KWR2, the MMA6519KWR2 offers tighter offset stability and lower noise floor for 80g-range crash signatures; compared with ADXL312WBRMZ-RL, it delivers certified functional safety compliance and deterministic arming latency required for airbag ECU integration.

Availability

MMA6519KWR2 is available at Aetrix Electronics and suitable for automotive airbag control units, rollover detection modules, and pre-crash system calibration requiring stable component supply across long production lifecycles.

Supply support for MMA6519KWR2 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 company specializing in secure connectivity solutions for automotive, industrial, and IoT markets.

The MMA65xx family was designed specifically for automotive safety-critical inertial sensing, with emphasis on AEC-Q100 reliability, deterministic arming response, and integrated diagnostics for ASIL-B compliance in airbag deployment systems.

FAQ

What is the qualified operating temperature range for the MMA6519KWR2?

The MMA6519KWR2 is AEC-Q100 Grade 1 qualified, with a verified operating ambient temperature range of −40°C to +105°C. This range is confirmed by 100% final test and applies to all electrical characteristics including sensitivity, offset, and arming response time. The MMA6519KWR2 maintains full functionality across this range without derating.

Does the MMA6519KWR2 support both 3.3V and 5V supply voltages simultaneously?

No, the MMA6519KWR2 operates from a single supply voltage - either 3.3 V (±3.135–3.45 V) or 5.0 V (±4.75–5.25 V), selected at design time. VCC powers the digital core and SPI interface; VREG and VREGA are internally regulated to 2.5 V and must be decoupled externally. Mixing supplies is not supported and may damage the device.

How is the offset cancellation function configured and controlled in the MMA6519KWR2?

Offset cancellation in the MMA6519KWR2 is enabled via the OFFCFG_EN bit in DEVCTL register and controlled through DEVCFG register bits. It performs >6.29 s averaging with <0.25 LSB/s slew rate and updates correction every 1049 ms. The correction value (±0.25 LSB) and thresholds (±0.125 LSB) are fixed per design; no user scaling is required. The MMA6519KWR2 automatically applies correction to output data stream.

Can the ARM_X and ARM_Y pins of the MMA6519KWR2 be used as general-purpose digital outputs?

No - ARM_X and ARM_Y are dedicated arming outputs with configurable open-drain behavior (active-low/high) and pulldown/pullup current specs (50–100 μA). They cannot be reconfigured as generic GPIOs. Their assertion timing (≤1.51 μs in unfiltered mode) and fault-safe default state (high-impedance when disabled) are optimized exclusively for airbag ECU interrupt signaling.

What SPI timing parameters define the maximum achievable data rate for the MMA6519KWR2?

The MMA6519KWR2 supports SPI clock periods down to 120 ns (8.33 MHz max), with minimum high/low times of 40 ns each. Data setup (20 ns) and hold (10 ns) times constrain reliable communication. At 8 MHz, the device achieves ~1.25 MSps effective sampling rate before filtering. The MMA6519KWR2's tACCESS (60 ns) and tVALID (35 ns) ensure fast register read/write turnaround for real-time configuration.