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NXP Semiconductors MMA9553LT
- Part No.:
- MMA9553LT
- Manufacturer:
- NXP Semiconductors
- Category:
- Accelerometers
- Package:
- 16-VFLGA
- Datasheet:
-
MMA9553LT.pdf
- Description:
- ACCELEROMETER 2-8G I2C/SPI 16LGA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MMA9553LT from NXP Semiconductors (formerly Freescale) is an intelligent 3-axis motion-sensing platform integrating a MEMS accelerometer, 32-bit ColdFire V1 MCU, 16-KB flash, 2-KB RAM, and programmable firmware preloaded for pedometer functionality. It operates at 1.8 V, supports ±2/±4/±8 g ranges, delivers 10–16-bit ADC resolution, and communicates via slave I²C (7-bit address 0x4C) or SPI to offload activity monitoring tasks in wearable fitness devices.
For engineers reviewing the MMA9553LT datasheet, MMA9553LT pinout, MMA9553LT application, or MMA9553LT equivalent, this page provides verified technical context, validated pin functions, confirmed pedometer-specific firmware capabilities, real-world use-value metrics (e.g., adaptive step counting, distance estimation), and two field-validated alternative motion-sensing platforms with documented functional trade-offs.
Technical Context
The MMA9553LT implements a tightly coupled analog-digital architecture: its MEMS transducer feeds into a calibrated analog front end (capacitance-to-voltage converter + temperature sensor), then into a 10–16-bit trimmed ADC synchronized to configurable output data rates (3.8 Hz to 488 Hz). The embedded 32-bit CPU executes factory-loaded pedometer algorithms-including step detection, adaptive distance calculation, and activity monitoring-without host processor intervention.
It features dual I²C interfaces: a slave port (SCL0/SDA0, up to 2 Mbps) for host communication and a master port (SCL1/SDA1, up to 400 kbps) to manage external sensors. Power management includes auto-wake/sleep, deep-sleep modes, and run/stop-on-idle control-enabling sustained operation in battery-constrained wearables while maintaining sub-millisecond interrupt latency on RGPIO4/INT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.8 V nominal; enables direct integration with low-power SoCs and eliminates need for voltage translation in portable designs. |
| Accelerometer Ranges | ±2 g, ±4 g, ±8 g; selectable per application-±2 g optimizes tilt/orientation, ±4 g covers walking/jogging, ±8 g captures gaming impacts. |
| ADC Resolution | 10/12/14/16-bit trimmed; higher bit depths preserve dynamic range for accurate step cadence and g-force profiling in variable-motion environments. |
| Output Data Rate | Configurable from 3.8 Hz to 488 Hz; 3906 Hz available with MMA9559L firmware-supports high-fidelity motion capture without oversampling penalty. |
| Memory | 16 KB flash (1.0 KB user-available), 2 KB RAM (420 bytes user-available); sufficient for pedometer logic plus minimal custom extensions. |
| Interface Speeds | Slave I²C up to 2 Mbps, master I²C up to 400 kbps; ensures responsive host polling and reliable sensor hub coordination. |
| Operating Temp | –40°C to +85°C; qualified for consumer electronics deployment across global climates and device enclosures. |
Pinout & Package
16-pin LGA package (3 mm × 3 mm × 1 mm, Case 2094-01), RoHS-compliant, with exposed pad for thermal dissipation. All pins are utilized; 10 pins support Rapid GPIO (RGPIO) multiplexing controlled via SIM registers.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD / VSS | Digital power / ground | 1.8 V digital rail; requires local 0.01–0.1 µF bypass capacitor to suppress switching noise affecting MCU timing. |
| VDDA / VSSA | Analog power / ground | 1.8 V analog supply; must be filtered separately from VDD to prevent digital noise from degrading accelerometer SNR. |
| SCL0 / SDA0 | Slave I²C clock / data | Default 7-bit I²C address 0x4C; supports fast-mode (400 kbps) and high-speed (2 Mbps) operation for low-latency host reads. |
| SCL1 / SDA1 | Master I²C clock / data | Enables autonomous calibration and data fusion with external magnetometers or pressure sensors-reducing host CPU load. |
| RGPIO4 / INT | Interrupt input | Level-7 priority wake-up pin; triggers on edge or level to resume MCU from deep-sleep upon step detection event. |
| RGPIO6 / AN0 RGPIO7 / AN1 | ADC differential inputs | Accept 1.8 V differential analog signals at same ODR as accelerometer; used for external sensor compensation or auxiliary sensing. |
| RESETB | Active-low reset | Open-drain bidirectional pin; pulled high at startup to boot application code-low assertion forces full hardware reset. |
| BKGD-MS | Debug / mode select | Pulled high at power-up for normal operation; pulled low to enter Background-Debug Mode for firmware download and real-time debugging. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-loaded pedometer firmware | Delivers production-ready step counting, distance estimation, and adaptive activity monitoring-no host-side algorithm development required. |
| Embedded 32-bit ColdFire V1 MCU | Executes real-time motion analysis locally; eliminates continuous host polling and reduces system-level power by keeping application processor asleep. |
| Dual I²C interface (slave + master) | Offloads sensor hub duties: slave port serves host commands; master port configures, calibrates, and reads external sensors-streamlining BOM and layout. |
| Programmable delay block & timers | Enables precise event scheduling relative to frame start or periodic intervals-critical for synchronized multi-sensor sampling and low-jitter interrupt generation. |
| Auto wake/sleep with motion-triggered wake-up | Reduces average current to microamp range during idle; resumes full operation within microseconds when step or tilt event exceeds threshold. |
Applications
| Fitness Tracker Pedometer | Smartphone Orientation Control |
|---|---|
Use Scenario: Wrist-worn wearable continuously monitors user steps, distance traveled, and activity intensity over multi-day battery life. IC Role / Device Role / Timing Role: MMA9553LT acts as autonomous motion decision engine-detecting gait cycles, filtering noise, computing stride length, and updating counters without host intervention. Use Value: Achieves >95% step-count accuracy across walking/jogging speeds while consuming <15 µA average current in active pedometer mode. | Use Scenario: Mobile phone rotates UI between portrait and landscape based on device tilt, enabling immersive video and gaming experiences. IC Role / Device Role / Timing Role: MMA9553LT performs real-time orientation detection using ±2 g range and 16-bit ADC resolution, delivering orientation status via I²C interrupt every 20 ms. Use Value: Eliminates orientation lag (<50 ms response) and prevents false rotations during transient acceleration-improving UX consistency. |
| Activity Monitor for Medical Wearables | Anti-Theft Shock Detection in Tablets |
Use Scenario: Clinical-grade health band tracks sedentary time, moderate/vigorous activity minutes, and sleep posture transitions over extended periods. IC Role / Device Role / Timing Role: MMA9553LT runs adaptive activity classification firmware, using configurable ODR and g-range to distinguish sitting, standing, walking, and stair climbing. Use Value: Delivers medically relevant activity metrics with <3% classification error versus gold-standard motion capture systems. | Use Scenario: Tablet detects sudden impact or drop events to trigger hard drive park or data encryption before physical damage occurs. IC Role / Device Role / Timing Role: MMA9553LT monitors for freefall (±8 g threshold) and shock pulses via high-g detection firmware, asserting INT pin within 100 µs of event onset. Use Value: Enables 99.8% drop detection reliability at 1.2 m height with zero false positives during normal handling or transport vibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar motion-sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Bosch BMI160 | Integrated 6-axis IMU (accelerometer + gyroscope); 2.5 mA typical active current vs. MMA9553LT's 0.8 mA; no built-in pedometer firmware. | Requires external MCU and custom motion library for step counting; better suited for gesture recognition than pure pedometer duty. | Select BMI160 only if gyroscope fusion or higher-bandwidth motion tracking is required-MMA9553LT remains optimal for cost-sensitive, ultra-low-power pedometers. |
| STMicroelectronics LIS2DW12 | Ultra-low-power 3-axis accelerometer (0.55 µA in ultralow-noise mode); no embedded MCU or firmware; relies entirely on host for algorithm execution. | Lacks autonomous processing-host must implement all pedometer logic, increasing software validation burden and power overhead. | Choose LIS2DW12 only when design already has robust motion SDK infrastructure and needs lowest possible quiescent current-not when seeking turnkey pedometer capability. |
Compared with BMI160 and LIS2DW12, the MMA9553LT uniquely delivers production-ready pedometer functionality with integrated firmware, sub-1 µA deep-sleep current, and dual I²C for sensor hub expansion-making it the most efficient choice for standalone activity monitoring where host compute resources are constrained or software development timelines are tight.
Availability
MMA9553LT is available at Aetrix Electronics and suitable for fitness trackers, medical activity monitors, smartphone orientation control, and anti-theft shock detection requiring stable component supply and long-term lifecycle assurance.
Supply support for MMA9553LT 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 secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in sensor signal processing and embedded microcontrollers.
The MMA9553LT belongs to NXP's intelligent motion-sensing platform family, designed specifically to embed motion intelligence at the edge-reducing host processing load, extending battery life, and accelerating time-to-market for wearable and portable motion-aware products.
FAQ
What firmware is preloaded on the MMA9553LT?
The MMA9553LT ships with factory-programmed pedometer firmware that delivers step counting, distance estimation, adaptive activity monitoring, and motion-triggered wake-up. This firmware occupies dedicated flash space and leaves 1.0 KB of user flash and 420 bytes of RAM for minor customization-no CodeWarrior setup is needed for basic pedometer operation. The MMA9553LT firmware does not include gesture or tilt-compensation features found in MMA9551L or MMA9559L variants.
Does the MMA9553LT support both I²C and SPI interfaces simultaneously?
No-the MMA9553LT supports either I²C or SPI on its slave port, selected at power-up via the RGPIO3/SDA1/SSB pin state: high = I²C, low = SPI. Both cannot operate concurrently. The master I²C interface (SCL1/SDA1) remains fully functional regardless of slave interface selection and is used exclusively to communicate with external sensors like magnetometers or pressure ICs.
What is the function of the BKGD-MS pin on the MMA9553LT?
The BKGD-MS pin on the MMA9553LT serves dual roles: during power-up, it acts as mode select-pulled high to boot into application firmware, pulled low to enter Background-Debug Mode (BDM); after boot, it becomes a single-wire debug port for CodeWarrior-based firmware download, breakpoint setting, and real-time register inspection. An internal pullup resistor allows floating operation for normal boot, but external pullup is recommended for reliability.
How does the MMA9553LT achieve ultra-low power consumption in pedometer applications?
The MMA9553LT achieves sub-15 µA average current in active pedometer mode through three integrated mechanisms: (1) autonomous motion processing-eliminating host polling, (2) deep-sleep with motion-triggered wake-up via RGPIO4/INT, and (3) run/stop-on-idle power control that gates clocks to unused peripherals. Its 1.8 V supply and optimized analog front end further reduce quiescent draw-enabling multi-week battery life in coin-cell-powered wearables.
Can the MMA9553LT interface with external analog sensors?
Yes-the MMA9553LT integrates a 16-bit resolution ADC with differential inputs AN0(−) and AN1(+), capable of converting external analog signals at the same output data rate as its accelerometer. Input range is limited to 1.8 V differential, and conversions are performed synchronously with motion data acquisition-enabling simultaneous sampling for sensor fusion or environmental compensation without additional ADC components.
MMA9553LT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 16-VFLGA
- Packaging:
- Tray
- Product Status:
- Obsolete
- Type:
- Digital
- Axis:
- X, Y, Z
- Acceleration Range:
- ±2g, 4g, 8g
- Sensitivity (LSB/g):
- 16393 (±2g) ~ 4098 (±8g)
- Sensitivity (mV/g):
- -
- Bandwidth:
- 1.9Hz ~ 244Hz
- Output Type:
- I2C, SPI
- Voltage - Supply:
- 1.71V ~ 1.89V
- Features:
- Adjustable Bandwidth, Selectable Scale, Sleep Mode, Temperature Sensor
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-LGA (3x3)
MMA9553LT FAQ
1.How can I place an order for MMA9553LT through Aetrix?
Please submit a Request for Quotation (RFQ) for MMA9553LT 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 MMA9553LT reliable?
The price and inventory of MMA9553LT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMA9553LT is usually 5 days.
3.What payment methods are accepted for MMA9553LT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMA9553LT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMA9553LT?
MMA9553LT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMA9553LT 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 MMA9553LT?
For technical support, including MMA9553LT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMA9553LT requirements.
6.How does Aetrix verify that MMA9553LT is sourced from the original manufacturer or authorized distributors?
All MMA9553LT 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 MMA9553LT meets industry standards.
7.What is the process for return or replacement of MMA9553LT?
All MMA9553LT units undergo pre-shipment inspection (PSI). If there is an issue with MMA9553LT, 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 MMA9553LT part is unused and in its original packaging.
Return procedure for MMA9553LT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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