My Inquiry
My Account
STMicroelectronics MP45DT02TR
- Part No.:
- MP45DT02TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microphones
- Package:
- Datasheet:
-
MP45DT02TR.pdf
- Description:
- MIC MEMS DIGITAL PDM OMNI -26DB
- Quantity:
- Payment:
- Shipping:
Inventory:4,175
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MP45DT02TR from STMicroelectronics is a top-port, omnidirectional digital MEMS microphone with PDM single-bit output, 120 dBSPL acoustic overload point, 61 dB A-weighted SNR, and -26 dBFS sensitivity. It integrates a silicon micromachined sensing element and CMOS interface IC in an HLGA 4.72×3.76 mm, 6-lead metal or plastic SMD package, operating from -30 °C to +85 °C for laptop audio input and portable speech recognition systems.
For engineers reviewing the MP45DT02TR datasheet, MP45DT02TR pinout, MP45DT02TR application, or MP45DT02TR equivalent, key selection criteria include its stereo-capable L/R channel selection logic, 1.64–3.6 V supply range, 0.65 mA normal-mode current, 2.4 MHz clock requirement, and HLGA package mechanical compatibility with automated SMT assembly.
Technical Context
The MP45DT02TR implements a dedicated CMOS interface IC that converts capacitive transduction from an Omron-supplied MEMS sensing element into a synchronous PDM bitstream. Its digital output eliminates analog noise susceptibility and simplifies integration with standard audio codecs or microcontrollers supporting PDM input.
Channel configuration is controlled via the L/R pin: when tied to GND, DOUT carries left-channel data on CLK high; when tied to Vdd, DOUT carries right-channel data on CLK high - enabling true hardware-selectable stereo pairing without external logic or firmware intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output format | PDM single-bit digital stream synchronized to external CLK; eliminates need for ADC and reduces EMI-sensitive analog routing. |
| Acoustic overload point | 120 dBSPL - withstands loud transient sounds (e.g., speaker feedback, close-range voice) without clipping or distortion. |
| Signal-to-noise ratio | 61 dB A-weighted @1 kHz, 1 Pa - enables clear far-field voice capture in noisy environments like open offices or classrooms. |
| Sensitivity | -26 dBFS (typ.) - delivers robust signal level at 1 Pa input pressure, reducing gain-stage noise amplification in downstream circuitry. |
| Supply current | 0.65 mA (normal mode), 20 µA (power-down) - supports battery-powered devices requiring low-quiescent audio sensing. |
| Operating temperature | -30 °C to +85 °C - qualified for use in laptops, automotive infotainment, and industrial edge devices with thermal cycling. |
| Power supply range | 1.64 V to 3.6 V - compatible with common 1.8 V and 3.3 V system rails without LDO regulation overhead. |
Pinout & Package
MP45DT02TR uses an HLGA (Hermetically Sealed Land Grid Array) 4.72 × 3.76 mm, 6-lead surface-mount package with 1.25 mm profile, available in both metal and plastic variants. The package is RoHS-compliant, ECOPACK® certified, and qualified per JEDEC J-STD-020 for lead-free reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Primary 0 V return path for analog and digital sections; must be low-impedance and decoupled near pin 6. |
| 2 LR | Left/right channel select | Digital control input: GND = left-channel output on CLK high; Vdd = right-channel output on CLK high. |
| 3 GND | Ground reference | Secondary ground terminal; improves power integrity and reduces substrate coupling in stereo configurations. |
| 4 CLK | Master clock input | Asynchronous 1–3.25 MHz square wave (40–60% duty); defines PDM sampling rate and data timing alignment. |
| 5 DOUT | PDM data output | Single-bit, time-sliced digital audio stream; high-impedance when disabled per L/R state; requires 1 kΩ pull-down for disable-time measurement. |
| 6 Vdd | Power supply | 1.64–3.6 V rail; requires local 100 nF ceramic + 10 µF ceramic decoupling directly at pin for stable PDM generation. |
Key Features
| Feature | Design Value |
|---|---|
| Omnidirectional MEMS sensing element | Uniform 360° acoustic response across 100 Hz–15 kHz; enables consistent pickup regardless of orientation in slim-profile enclosures. |
| Stereo-capable hardware channel selection | L/R pin configures DOUT as left or right channel without firmware or external MUX - reduces BOM count and latency in dual-mic arrays. |
| Low-power PDM interface | 0.65 mA active current and 20 µA power-down draw enable always-on voice wake-up in battery-constrained wearables and IoT nodes. |
| High acoustic overload margin | 120 dBSPL AOP prevents saturation during loud events (e.g., clapping, door slams), preserving intelligibility in conferencing and VR voice input. |
| ECOPACK® and RoHS compliance | Meets global environmental regulations; metal cap variant offers enhanced EMI shielding and thermal stability over plastic HLGA. |
Applications
| Mobile Voice Input | Laptop Far-Field Audio |
|---|---|
|
Use Scenario: Dual-microphone array in smartphones for noise-suppressed voice calls and voice assistant activation. IC Role / Device Role / Timing Role: Primary PDM audio sensor providing left/right channel data synchronized to shared system clock. Use Value: 61 dB SNR and 120 dBSPL AOP ensure clean speech capture even in crowded urban environments or windy outdoor conditions. |
Use Scenario: Integrated microphone pair in ultrabook lid for video conferencing and dictation software. IC Role / Device Role / Timing Role: Top-port digital microphone delivering low-noise, low-latency PDM stream directly to audio SoC. Use Value: 1.25 mm height enables thin bezel integration; HLGA package ensures reliable reflow yield in high-volume SMT lines. |
| Voice-Controlled Gaming | Smart Camera Audio Capture |
|
Use Scenario: VR headset with real-time voice command and spatial audio feedback. IC Role / Device Role / Timing Role: Stereo-configurable MEMS mic feeding PDM data to DSP for beamforming and echo cancellation. Use Value: Hardware L/R selection eliminates timing skew between channels, critical for accurate interaural time difference (ITD) calculation. |
Use Scenario: Digital still/video camera with built-in stereo narration and ambient sound recording. IC Role / Device Role / Timing Role: Compact, low-profile digital microphone mounted near lens barrel for directional audio capture. Use Value: -26 dBFS sensitivity and flat frequency response (±2 dB, 100 Hz–10 kHz) preserve tonal fidelity in field recordings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital MEMS microphone applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INVENSENSE ICS-43432 | Lower SNR (60 dB), same PDM output, but higher sensitivity (-26 dBFS typ.) and wider supply range (1.65–3.6 V). | Optimized for ultra-low-power always-on wake word detection; lacks explicit stereo channel selection pin. | Select when power budget is tighter than SNR requirement and stereo pairing is handled in firmware. |
| TDK INMP522 | I²S output instead of PDM; 65 dB SNR; 115 dBSPL AOP; requires external clock generator or codec support for I²S timing. | Better suited for high-fidelity recording where I²S interface simplifies synchronization with multi-channel audio processors. | Select when system already includes I²S-capable audio hub and higher dynamic range is prioritized over compact stereo hardware control. |
Compared with ICS-43432 and INMP522, MP45DT02TR uniquely combines hardware-selectable stereo output, industry-leading 61 dB SNR, and 120 dBSPL overload margin in a 4.72×3.76 mm HLGA footprint - making it optimal for space-constrained, dual-mic consumer electronics requiring deterministic channel assignment and robust acoustic performance.
Availability
MP45DT02TR is available at Aetrix Electronics and suitable for laptop audio subsystems, VoIP endpoint designs, and portable speech recognition devices requiring stable component supply and long-term manufacturing continuity.
Supply support for MP45DT02TR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, sensors, power management ICs, and analog/mixed-signal products for industrial, automotive, and consumer markets.
The MP45DT02TR belongs to ST's MEMS audio sensor product line, engineered specifically for high-SNR, low-power, small-form-factor digital microphone applications in mobile computing and intelligent edge devices.
FAQ
What is the recommended power supply decoupling for MP45DT02TR?
ST specifies a 100 nF ceramic capacitor and a 10 µF ceramic capacitor placed as close as possible to pin 6 (Vdd), with short, low-inductance traces to both GND pins (1 and 3). This dual-capacitor network suppresses high-frequency switching noise and stabilizes the internal voltage regulator during PDM transitions.
How does the L/R pin configure stereo operation?
The L/R pin selects channel mapping: when pulled to GND, DOUT outputs left-channel data on CLK high; when pulled to Vdd, DOUT outputs right-channel data on CLK high. No external clock gating or firmware control is needed - the selection is purely static and hardware-defined per device.
Is MP45DT02TR compatible with 3.3 V systems?
Yes - MP45DT02TR supports Vdd from 1.64 V to 3.6 V. At 3.3 V, it operates within specification for current consumption (0.65 mA typ.), SNR (61 dB), and AOP (120 dBSPL), with VIH/VIL thresholds scaling accordingly (0.65×Vdd and 0.35×Vdd).
What is the wake-up time from power-down mode?
The wake-up time is guaranteed at 10 ms - defined as the interval from the first valid CLK edge after exiting power-down mode to the appearance of valid PDM data on DOUT. This delay is fixed and independent of supply voltage or temperature within rated operating conditions.
MP45DT02TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- MEMS (Silicon)
- Output Type:
- Digital, PDM
- Direction:
- Omnidirectional
- Frequency Range:
- 100 Hz ~ 10 kHz
- Sensitivity:
- -26dB ±3dB @ 94dB SPL
- S/N Ratio:
- 61dB
- Impedance:
- -
- Voltage - Rated:
- 1.8 V
- Voltage Range:
- 1.64 V ~ 3.6 V
- Current - Supply:
- 650 µA
- Port Location:
- Top
- Ratings:
- -
- Termination:
- Solder Pads
- Size / Dimension:
- 0.186" L x 0.148" W (4.72mm x 3.76mm)
- Height (Max):
- 0.054" (1.38mm)
- Shape:
- Rectangular
- Grade:
- -
- Qualification:
- -
MP45DT02TR FAQ
1.How can I place an order for MP45DT02TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MP45DT02TR 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 MP45DT02TR reliable?
The price and inventory of MP45DT02TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP45DT02TR is usually 5 days.
3.What payment methods are accepted for MP45DT02TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP45DT02TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP45DT02TR?
MP45DT02TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP45DT02TR 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 MP45DT02TR?
For technical support, including MP45DT02TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP45DT02TR requirements.
6.How does Aetrix verify that MP45DT02TR is sourced from the original manufacturer or authorized distributors?
All MP45DT02TR 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 MP45DT02TR meets industry standards.
7.What is the process for return or replacement of MP45DT02TR?
All MP45DT02TR units undergo pre-shipment inspection (PSI). If there is an issue with MP45DT02TR, 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 MP45DT02TR part is unused and in its original packaging.
Return procedure for MP45DT02TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MP45DT02TR Tags
-
SPU0410LR5H-QB
Knowles
-
CMA-4544PF-W
Same Sky (Formerly CUI Devices)
-
CMB-6544PF
Same Sky (Formerly CUI Devices)
-
SPH0641LM4H-1
Knowles
-
CMA-6542PF
Same Sky (Formerly CUI Devices)
-
SPV0142LR5H-1
Knowles
-
AOM-4544P-2-R
PUI Audio, Inc.
-
MMICT390200012
TDK InvenSense
-
SPH0690LM4H-1
Knowles
-
EM-6022P
Soberton Inc.
-
SPH6611LR5H-1
Knowles
-
AMM-3738-B-R
PUI Audio, Inc.
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
