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STMicroelectronics STHS34PF80TR
- Part No.:
- STHS34PF80TR
- Manufacturer:
- STMicroelectronics
- Category:
- Ambient Light, IR, UV Sensors
- Package:
- 10-LFDFN
- Datasheet:
-
STHS34PF80TR.pdf
- Description:
- SENSOR OPT 5000-20000NM IR 10
- Quantity:
- Payment:
- Shipping:
Inventory:2,575
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Product details
Overview
STHS34PF80TR from STMicroelectronics is a factory-calibrated, uncooled infrared presence and motion detection sensor based on TMOS thermal transistor technology. It detects stationary and moving human-sized objects up to 4 meters without lens, operates across 5–20 µm IR spectrum, delivers 2000 LSB/°C object temperature sensitivity, and integrates ambient temperature sensing with ±0.3 °C accuracy over –10 to +60 °C - deployed in smart lighting and security systems.
For engineers reviewing the STHS34PF80TR datasheet, STHS34PF80TR pinout, STHS34PF80TR application, or STHS34PF80TR equivalent, this page provides verified electrical specs (1.7–3.6 V supply, 10 µA active current), interface details (I²C/SPI selectable via CS pin), field-of-view (80°), noise performance (25 LSBrms), and real-world use cases including presence-triggered IoT devices and overtemperature-aware industrial enclosures.
Technical Context
The STHS34PF80TR uses a differential TMOS sensor array with one exposed and one shielded thermal transistor element, enabling rejection of self-heating effects. Its ASIC implements three configurable detection modes - presence, motion, and ambient temperature shock - each driven by independent low-pass filtered signal paths and programmable thresholds (PRESENCE_THS, MOTION_THS, TAMB_SHOCK_THS).
It supports dual digital interfaces on shared pins: I²C (slave address 0x5A) and 3-wire SPI, selected by logic level on CS pin. Programmable output data rates range from 0.25 Hz to 30 Hz, plus one-shot mode, with interrupt assertion (INT pin) for flag-driven system wake-up and event handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 1.7 V to 3.6 V - compatible with single-cell Li-ion, coin cell, and 3.3 V embedded rails. |
| Supply current | 10 µA at 1 Hz ODR - enables multi-year battery life in always-on IoT endpoints. |
| IR sensitivity | 2000 LSB/°C - enables reliable detection of sub-0.1 °C object temperature changes at full FOV. |
| RMS noise | 25 LSBrms - ensures stable presence/motion discrimination under low-signal conditions. |
| Field of view | 80° - covers standard room entryways and wall-mounted zones without external optics. |
| Operating wavelength | 5 µm to 20 µm - rejects visible light and solar IR interference; optimized for human body radiation peak (~9.4 µm). |
| Ambient temp accuracy | ±0.3 °C (–10 to +60 °C) - supports precise thermal compensation and environmental monitoring. |
Pinout & Package
LGA-10L package: 3.2 × 4.2 × 1.455 mm (max), RoHS and ECOPACK compliant, surface-mount compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SCL / SPC | I²C clock / SPI clock | Shared bidirectional clock input; requires external pull-up for I²C; no pull-up needed for SPI. |
| 2 RES | Reserved | Must be connected to GND; no internal function. |
| 3 CS | Interface select | High = I²C enabled; Low = SPI enabled; internal pull-up defaults to I²C mode. |
| 4 SDA / SDI/O | I²C data / SPI data I/O | Bidirectional serial data line; open-drain for I²C; tri-state for SPI read/write. |
| 5 NC | No connect | Leave floating; not internally bonded. |
| 6 VDD | Power supply | Primary analog/digital supply rail; decoupling capacitor (100 nF) required adjacent to pin. |
| 7 GND | Ground | First ground reference; must be low-impedance connection to PCB ground plane. |
| 8 GND | Ground | Second ground reference; improves thermal and EMI stability of TMOS die. |
| 9 VDD | Power supply | Secondary supply rail; reduces IR measurement drift under dynamic load conditions. |
| 10 INT | Interrupt output | Active-low open-drain output asserting PRES_FLAG, MOT_FLAG, or TAMB_SHOCK_FLAG events. |
Key Features
| Feature | Design Value |
|---|---|
| Differential TMOS architecture | Rejects self-heating drift by comparing exposed/shielded thermal transistors - enables stable long-term presence detection. |
| Programmable gain modes | Default mode (–40 to +85 °C, ±2 °C delta) and wide mode (–90 to +50 °C delta) - selectable via CTRL0 register for varying thermal environments. |
| Smart detection algorithms | On-chip presence/motion/ambient-shock logic eliminates host MCU processing overhead and reduces firmware complexity. |
| Integrated silicon IR filter | Monolithically deposited bandpass filter (5–20 µm) - blocks visible light and NIR, eliminating need for external optical filters. |
| Factory calibration | Per-device offset/gain coefficients stored in nonvolatile registers - removes need for end-user calibration in production. |
Applications
| Smart Lighting Control | Occupancy-Aware Security System |
|---|---|
|
Use Scenario: Automatic LED illumination in office corridors triggered only when a person enters and remains stationary within zone. IC Role / Device Role / Timing Role: Primary presence detector providing occupancy status via INT pin assertion and I²C-read object temperature data. Use Value: Eliminates false triggers from air currents or sunlight by distinguishing stationary humans (2000 LSB/°C sensitivity) from background IR drift. |
Use Scenario: Intrusion alert in unoccupied residential rooms using motion + presence correlation to reduce false alarms. IC Role / Device Role / Timing Role: Dual-mode sensor feeding both MOT_FLAG (motion onset) and PRES_FLAG (persistent occupancy) to security controller. Use Value: Reduces nuisance alerts by >70% compared to PIR-only sensors through differential TMOS signal validation and ambient shock rejection. |
| IoT Smart Locker Monitoring | Thermal Shock Detection in HVAC Enclosures |
|
Use Scenario: Detecting user approach and dwell time at shared parcel lockers to activate touchscreen and initiate authentication. IC Role / Device Role / Timing Role: Presence initiator with one-shot mode enabling ultra-low-power wake-up before full system boot. Use Value: Achieves <15 µA average system current by keeping MCU in deep sleep until INT pin asserts presence event. |
Use Scenario: Monitoring rapid ambient temperature shifts inside HVAC control panels caused by condensation or refrigerant leaks. IC Role / Device Role / Timing Role: Ambient temperature shock detector using LPF_A_T vs TAMBIENT comparison with configurable HYST_TAMBS threshold. Use Value: Identifies thermal transients ≥2 °C/s - enabling predictive maintenance before component failure or sensor saturation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar infrared presence and motion detection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AMG8833 (Panasonic) | 8×8 thermal array (64 pixels); higher resolution but 6.5 mA active current; no built-in presence/motion logic. | Requires external MCU for algorithm execution; suited for thermal imaging, not simple presence triggering. | Select when pixel-level thermal mapping is needed; avoid for battery-powered presence-only use cases. |
| MLX90640 (Melexis) | 32×24 IR array; 1.8 V–3.6 V supply; 12 mA active current; I²C only; ±1.5 °C ambient accuracy. | Higher power and cost; used in gesture recognition and HVAC airflow analysis, not low-cost occupancy sensing. | Choose for high-resolution thermal profiling; not recommended where 10 µA operation and factory-calibrated presence logic are critical. |
Compared with AMG8833 and MLX90640, the STHS34PF80TR delivers presence/motion decisions autonomously at 1/600th the active current, with integrated ambient compensation and no host processing burden - making it optimal for cost-sensitive, battery-operated smart building nodes.
Availability
STHS34PF80TR is available at Aetrix Electronics and suitable for smart lighting control, occupancy-aware security systems, IoT smart locker monitoring, and thermal shock detection in HVAC enclosures requiring stable component supply across automotive-grade temperature ranges (–40 °C to +85 °C).
Supply support for STHS34PF80TR 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 ICs, and analog components for industrial, automotive, and consumer markets.
The STHS34PF80TR belongs to ST's intelligent thermal sensor product line, engineered specifically for ultra-low-power, lensless presence detection in space-constrained IoT edge nodes - emphasizing factory calibration, differential thermal sensing, and embedded decision logic.
FAQ
Does the STHS34PF80TR require an external lens to detect humans at 4 meters?
No. The STHS34PF80TR achieves up to 4-meter detection range for 70 × 25 cm² objects without any external lens, thanks to its high-sensitivity TMOS architecture and 80° field of view defined by the LGA package window. External optics may extend range or narrow FOV but are not necessary for baseline operation.
How does the device distinguish between stationary and moving objects?
It uses two parallel low-pass filtered TMOS signal paths (LPF_P_M and LPF_P for presence; LPF_P_M and LPF_M for motion) and compares their difference against independently programmable thresholds (PRESENCE_THS and MOTION_THS). Motion detection triggers on transient differentials; presence holds state during sustained differential - both validated by on-chip logic.
What is the role of the RES and NC pins?
Pin 2 (RES) is reserved and must be connected to GND per datasheet; it has no internal function. Pin 5 (NC) is not internally bonded and must remain unconnected - neither pin may be tied to VDD, signal lines, or left floating in violation of Table 14's default pin status guidance.
Can the STHS34PF80TR operate reliably in direct sunlight?
Yes. Its monolithic silicon IR filter restricts response to 5–20 µm wavelengths, blocking visible light and near-infrared (NIR) energy from solar sources. Measured RMS noise remains at 25 LSBrms under irradiance conditions that saturate unfiltered PIR sensors, ensuring stable operation behind glass or polycarbonate windows.
STHS34PF80TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 10-LFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- IR
- Wavelength:
- 5000nm ~ 20000nm
- Proximity Detection:
- No
- Output Type:
- I2C, SPI
- Voltage - Supply:
- 1.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-OLGA (3.2x4.2)
STHS34PF80TR FAQ
1.How can I place an order for STHS34PF80TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STHS34PF80TR 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 STHS34PF80TR reliable?
The price and inventory of STHS34PF80TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STHS34PF80TR is usually 5 days.
3.What payment methods are accepted for STHS34PF80TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STHS34PF80TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STHS34PF80TR?
STHS34PF80TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STHS34PF80TR 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 STHS34PF80TR?
For technical support, including STHS34PF80TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STHS34PF80TR requirements.
6.How does Aetrix verify that STHS34PF80TR is sourced from the original manufacturer or authorized distributors?
All STHS34PF80TR 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 STHS34PF80TR meets industry standards.
7.What is the process for return or replacement of STHS34PF80TR?
All STHS34PF80TR units undergo pre-shipment inspection (PSI). If there is an issue with STHS34PF80TR, 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 STHS34PF80TR part is unused and in its original packaging.
Return procedure for STHS34PF80TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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