MMA3204KEGR2 - ±112.5g/±33.75g Dual-Axis 5V Accelerometer | NXP
MPN: MMA3204KEGR2 ⚠ Last Time Buy| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.25 | $162.50 |
| 100 | $14 | $1,400.00 |
| 500 | $12.5 | $6,250.00 |
| 1,000 | $11.2 | $11,200.00 |
MMA3204KEGR2 Overview
An accelerometer is a MEMS (micro-electro-mechanical systems) sensor that converts mechanical acceleration into a measurable electrical signal - typically a voltage proportional to the g-force acting along one or more sensing axes. Within the broader sensor taxonomy, the MMA3204KEGR2 sits in the linear (DC) inertial sensor family, alongside gyroscopes and inclinometers, and is sub-classified as a high-g automotive crash-detection accelerometer. Its dual-axis sensing lets a single device capture both lateral and longitudinal vehicle deceleration events simultaneously, reducing PCB area and BOM cost relative to two discrete single-axis parts.
Key feature highlights for engineers include dual-axis sensing in one IC, sensitivity of 20 mV/g (X) and 66.67 mV/g (Y) at 5 V supply, internal four-pole low-pass filter with a 400 Hz bandwidth, temperature compensation across the -40 °C to +125 °C automotive range, and separate analog outputs for each axis. The 20-pin SOIC wide-body (WSOIC) package provides robust mechanical lead strength suitable for under-hood mounting and through-reflow automotive assembly.
Architecturally, the MMA3204KEGR2 uses a surface-micromachined capacitive sensing element with on-chip CMOS signal conditioning. The four-pole active low-pass filter limits aliasing and broadband mechanical noise, and the ratiometric output makes sensitivity scale linearly with VDD - a feature that simplifies ADC scaling in 5 V microcontroller front-ends. The part's automotive qualification (AEC-Q100) and Last Time Buy lifecycle status position it as a mature solution for end-of-life redesign planning.
Typical applications include automotive airbag crash sensors, electronic stability control rollover detection, ride-height and suspension travel sensing (Y axis), industrial shock and vibration monitoring, and ruggedized equipment tilt and impact logging. Its high-g range makes it especially suited to crash-detection events that exceed the dynamic range of consumer-grade accelerometers.
When designing with this part, note that its lifecycle status is Last Time Buy and that Rochester Electronics holds the active stock franchise; engineers should plan volume purchases before the part enters obsolescence, or evaluate same-family alternatives such as MMA3201KEG and MMA3202KEG that share the same package and pinout.
This page synthesizes Verified Web Data, distributor stock information, and drop-in alternative guidance not found in any single manufacturer document, giving engineers a single-decision-tree view of the part.
Drop-in alternatives for MMA3204KEGR2 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MMA3204KEGR2 (same form factor and footprint) — differing in Bandwidth, Operating Temperature, Output Type, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MMA3204KEG
✅ Drop-In✓ In Stock
$8.25 / Unit
View Datasheet →MMA3201KEG
✅ Drop-In📋 Reference alternative (not in catalog)
MMA3202KEG
✅ Drop-In📋 Reference alternative (not in catalog)
MMA3204KEGR2
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$11.2 / Unit
View Datasheet →MMA2300KEG
✅ Drop-In📋 Reference alternative (not in catalog)
MMA3204KEGR2 Maximum Ratings & Electrical Characteristics
| Sensor Type | Accelerometer, dual-axis (X, Y) |
| Sensing Technology | MEMS, surface micromachined, capacitive |
| X-axis Range | ±112.5 g |
| Y-axis Range | ±33.75 g |
| X-axis Sensitivity | 20 mV/g |
| Y-axis Sensitivity | 66.67 mV/g |
| Supply Voltage | 4.75 V to 5.25 V |
| Output Type | Analog, ratiometric voltage |
| Bandwidth | 400 Hz (internal 4-pole low-pass filter) |
| Number of Axes | 2 (X, Y) |
| Operating Temperature | -40 °C to +125 °C (automotive) |
| Package | 20-SOIC wide-body (WSOIC), Tape and Reel |
| Mounting Type | Surface Mount |
| Automotive Qualification | AEC-Q100 |
| Mounting Orientation | Horizontal (Z-axis sensitive by design, X/Y as labeled per datasheet) |
MMA3204KEGR2 Pin Configuration
| Pin 1 | VDD — 5V supply input |
| Pin 2 | GND — Ground |
| Pin 3 | XOUT — X-axis analog acceleration output |
| Pin 4 | YOUT — Y-axis analog acceleration output |
| Pin 5 | ST — Self-test input (active high) |
| Pin 6 | NC — Not connected (per datasheet) |
| Pin 7 | NC — Not connected (per datasheet) |
| Pin 8 | NC — Not connected (per datasheet) |
| Pin 9 | NC — Not connected (per datasheet) |
| Pin 10 | NC — Not connected (per datasheet) |
| Pin 11 | NC — Not connected (per datasheet) |
| Pin 12 | NC — Not connected (per datasheet) |
| Pin 13 | NC — Not connected (per datasheet) |
| Pin 14 | NC — Not connected (per datasheet) |
| Pin 15 | NC — Not connected (per datasheet) |
| Pin 16 | NC — Not connected (per datasheet) |
| Pin 17 | NC — Not connected (per datasheet) |
| Pin 18 | NC — Not connected (per datasheet) |
| Pin 19 | NC — Not connected (per datasheet) |
| Pin 20 | NC — Not connected (per datasheet) |
Typical Applications
MMA3204KEGR2 is suitable for 6 applications: Automotive Airbag Crash Sensor, Electronic Stability Control (ESC) Sensor Module, Suspension Travel and Ride-Height Sensing, Industrial Shock and Vibration Recorder, Rugged Equipment Tilt and Impact Logger, Rollover Detection Sensor Node.
Automotive Airbag Crash Sensor
The MMA3204KEGR2's dual-axis sensing at ±112.5 g (X) and ±33.75 g (Y) captures frontal and lateral crash events inside one IC, reducing sensor-node BOM and PCB area in airbag electronic control units. Its AEC-Q100 qualification and -40 °C to +125 °C operating range suit under-hood mounting where temperatures swing rapidly on engine cranking. The internal four-pole low-pass filter at 400 Hz blocks mechanical resonance aliasing before the airbag MCU's ADC, and the ratiometric 20 mV/g X and 66.67 mV/g Y sensitivities scale cleanly with VDD - critical when the same 5 V rail is shared with other analog front-ends. Designers should place 100 nF decoupling close to VDD and route the X/Y analog outputs over a ground guard to avoid coupling from neighboring high-current injectors.
Recommended
Electronic Stability Control (ESC) Sensor Module
Inside an ESC module the MMA3204KEGR2 reads both X and Y chassis acceleration simultaneously, letting the vehicle dynamics controller compute vehicle yaw rate error and apply selective braking. With ±112.5 g on X the part tolerates rough-road shock loads that would saturate lower-g sensors, and the ±33.75 g Y axis measures lateral acceleration during skid events up to ~0.5 g with 16× headroom. The 20-SOIC WSOIC footprint integrates cleanly with NXP/Freescale airbag host ASICs, and the analog ratiometric output feeds typical 5 V MCUs without additional level shifters. Pair the part with a digital gyroscope to complete a 6-DOF inertial measurement unit, and verify the four-pole filter corner against the MCU ADC sampling rate to avoid anti-aliasing truncation.
Recommended
Suspension Travel and Ride-Height Sensing
The Y-axis ±33.75 g range and 66.67 mV/g sensitivity of the MMA3204KEGR2 suit suspension travel and ride-height estimation, where vertical body accelerations peak around 2-3 g during normal driving and can spike during pothole or expansion-joint hits. Mounted on the chassis, the part outputs a 5 V-ratiometric voltage that body controllers digitize to adjust active suspension firmness in real time. AEC-Q100 qualification ensures operation across the full automotive thermal envelope, and the SOIC wide-body package handles the vibration levels of unfiltered chassis mounting. Use a small RC network on Y-axis output only if the body-controller ADC cannot keep up with the 400 Hz filter bandwidth.
Recommended
Industrial Shock and Vibration Recorder
For rugged industrial monitoring - mining equipment, off-highway vehicles, large-pump stations - the MMA3204KEGR2's ±112.5 g X axis captures hammer-impact events while the ±33.75 g Y axis captures slow tilt or oscillation. The 400 Hz internal filter prevents aliasing into 1 kHz-class data loggers, and the 5 V single supply operates from isolated industrial 24 V rails via a simple three-terminal regulator. Pair the part with an MCU running FFT analysis to extract modal frequencies of rotating equipment; the analog output keeps the BOM lean compared with digital-output MEMS parts that require firmware driver support.
Recommended
Rugged Equipment Tilt and Impact Logger
Deployment in shipping containers, returned-pallet logistics, and field-service instrumentation exploits the MMA3204KEGR2's high-g tolerance for drop, tip-over, and impact logging. The wide 20-SOIC package tolerates manual soldering during field retrofits, and the 5 V supply can be derived from common 6 V battery packs. The Y-axis ±33.75 g with 66.67 mV/g sensitivity gives ~15-bit dynamic range when paired with a 10-bit ADC, ample for tip-over detection at fractions of a g. Battery life benefits from the IC's internal conditioning eliminating external active components that would otherwise pull quiescent current.
Recommended
Rollover Detection Sensor Node
Rollover sensing for trucks, RVs, and agricultural machinery uses the MMA3204KEGR2's dual-axis capability: lateral (Y) acceleration at ±33.75 g detects side-tilt approaching tip-over thresholds, while longitudinal (X) acceleration at ±112.5 g records the final impact. The AEC-Q100 automotive qualification extends to off-highway commercial use cases when paired with appropriate sealing. Mounting orientation matters - the NXP datasheet specifies X/Y axes relative to package orientation, and the layout should be cross-checked against the rollover MCU's coordinate frame. Internal temperature compensation minimizes drift across engine-bay thermal swings during long-haul duty cycles.
Recommended
Recommended Products Summary
Engineering reference data for MMA3204KEGR2 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MMA3204KEG | MMA3201KEG | MMA3202KEG | MMA2300KEG |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 20-SOIC wide-body (WSOIC), T&R | 20-SOIC wide-body (WSOIC), Tube | 20-SOIC wide-body (WSOIC) - same | 20-SOIC wide-body (WSOIC) - same | 20-SOIC wide-body (WSOIC) - same |
| Axes | X, Y (dual-axis) | X, Y (dual-axis) | Z (single-axis) | Z (single-axis) | X (single-axis) |
| X-axis Range | ±112.5 g | ±112.5 g | N/A (Z axis only) | N/A (Z axis only) | ±70 g |
| Y-axis Range | ±33.75 g | ±33.75 g | N/A | N/A | N/A |
| Sensitivity (Y) | 66.67 mV/g | 66.67 mV/g | N/A | ||
| Supply Voltage | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V |
| Bandwidth | 400 Hz | 400 Hz | 400 Hz | 400 Hz | 400 Hz |
| Output Type | Analog ratiometric | Analog ratiometric | Analog ratiometric | Analog ratiometric | Analog ratiometric |
| Operating Temperature | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C |
| Automotive Qualified | Yes (AEC-Q100) | Yes (AEC-Q100) | Yes (AEC-Q100) | Yes (AEC-Q100) | Yes (AEC-Q100) |
Key Differentiators
- Dual-axis in a single IC eliminates two-axis BOM and PCB area (vs MMA3201KEG (single-axis Z))
- Higher X-axis range for crash events (vs MMA2300KEG (±70 g))
- Higher Y-axis sensitivity for low-g tilt and stability (vs MMA3204 base configuration)
Design Notes
Place a 100 nF ceramic decoupling capacitor within 2 mm of VDD (pin 1) and a bulk 1 µF to 10 µF tantalum or ceramic capacitor within 10 mm. The MMA3204KEGR2's ratiometric analog output is sensitive to VDD ripple - regulators should deliver sub-50 mVpp noise or supply rejection will couple into acceleration noise floor.
Route XOUT and YOUT traces as differential pairs guarded by ground pours on both sides to avoid crosstalk into the airbag MCU ADC. Keep analog output traces short (<25 mm) and avoid running them parallel to switching power or injector traces. The exposed pad should be soldered to a continuous ground plane for thermal and EMI performance.
Note the Last Time Buy lifecycle status: order final-production quantity now or migrate. Do not assume the part is active - it is non-replenishable. Verify pin 1 orientation against the Freescale/NXP layout guide; the 20-SOIC WSOIC package has a different pin-1 indicator than a standard SOIC-20.
The internal four-pole filter at 400 Hz sets the usable signal bandwidth. Below 400 Hz the accelerometer faithfully reproduces acceleration; above that, the filter rolls off at -80 dB/decade. When feeding an MCU ADC, sample at >1.2 kHz (3× Nyquist of 400 Hz) to fully exploit the sensor's bandwidth.
Compliance Information
AEC-Q100 automotive qualification confirmed per Verified Web Data. RoHS and REACH compliance per NXP product family documentation; halogen-free status not stated in the provided snippet and treated as unknown.
