STM8S903K3T6C STMicroelectronics Integrated Circuit (Quad Flat Packages) In Stock
STM8S903K3T6C is an STMicroelectronics 8-bit STM8 microcontroller running up to 16 MHz with 8 KB flash, integrated ADC, and boundary scan in a 32-pin LQFP package. Supports operating voltages of 2.95 V to 5.5 V and temperatures from -40°C to +85°C. Available from stock with worldwide shipping.
- Manufacturer
- STMicroelectronics
- Package
- Quad Flat Packages
- Pin Count
- 32
- Lifecycle
- ACTIVE
- Datasheet
- STM8S903K3T6C Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.0885(MOQ 10)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of STM8S903K3T6C?
- 8-bit STM8 core at up to 16 MHz with 8 KB flash and integrated ADC provides cost-effective control in a 32-pin LQFP-32 footprint
- Boundary scan (JTAG) support enables in-system testing and simplified board-level debug without additional test probes
- Wide supply range of 2.95 V to 5.5 V allows direct operation from 3.3 V or 5 V rails without external regulators
What is STM8S903K3T6C used for?
STM8S903K3T6C targets cost-sensitive embedded control applications such as appliance motor control, lighting management, and HVAC sensors that require a compact 8-bit microcontroller with onboard ADC. Its 16 MHz STM8 core and 32-pin LQFP footprint suit small-form-factor PCBs in white goods and industrial sensors where flash density up to 8 KB is sufficient. The integrated boundary scan simplifies manufacturing test for high-volume consumer products.
What are the specifications of STM8S903K3T6C?
| Factory Lead Time | 10Weeks |
| YTEOL | 9 |
| Has ADC | YES |
| Bit Size | 8 |
| Boundary Scan | YES |
| CPU Family | STM8 |
| Clock Frequency-Max | 16MHz |
| DAC Channels | NO |
| DMA Channels | NO |
| JESD-30 Code | S-PQFP-G32 |
| JESD-609 Code | e4 |
| Number of I/O Lines | 24 |
| On Chip Program ROM Width | 32 |
| PWM Channels | YES |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | QFP32,.35SQ,32 |
| Package Shape | SQUARE |
| Package Style | FLATPACK, LOW PROFILE |
| Peak Reflow Temperature (Cel) | 235 |
| Qualification Status | Not Qualified |
| RAM (bytes) | 1024 |
| ROM (words) | 2048 |
| ROM Programmability | FLASH |
| Speed | 16MHz |
| Supply Current-Max | 4.75mA |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 3.3V |
| Supply Voltage-Nom | 3.3V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Nickel/Palladium/Gold/Silver (Ni/Pd/Au/Ag) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.8mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| uPs/uCs/Peripheral ICs Type | MICROCONTROLLER |
| Package | Quad Flat Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 3 |
| ECCN | EAR99 |
| HTS Code | 8542.31.00.15 |
| Country of Origin | Malaysia |
Where can I find the STM8S903K3T6C datasheet?
STM8S903K3T6C Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for STM8S903K3T6C?
Compatible alternatives and drop-in replacements for STM8S903K3T6C:
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Frequently Asked Questions
How much flash memory does STM8S903K3T6C provide and is it enough for a simple sensor firmware?
STM8S903K3T6C includes 8 KB of flash memory and 1 KB of RAM. For a simple sensor node reading an ADC channel, applying a digital filter, and outputting data over UART, 8 KB is typically sufficient; a typical polling-loop firmware with interrupt handling for a single sensor occupies 2 KB to 5 KB in STM8 assembly or C.
What ADC resolution and channel count does STM8S903K3T6C offer for analog sensing?
The integrated ADC in STM8S903K3T6C is a 10-bit successive-approximation type with up to 5 multiplexed input channels. A 10-bit ADC provides 1024 counts over the reference range, yielding roughly 4.9 mV resolution on a 5 V reference. This suits temperature sensing with NTC thermistors, pressure transducers, and potentiometer-based position sensing.
Which serial communication interfaces are available on STM8S903K3T6C?
STM8S903K3T6C provides a UART, an SPI interface, and an I2C interface, all accessible through the 32 GPIO pins of the LQFP-32 package. UART supports baud rates up to 1 Mbps, I2C operates at up to 400 kHz (Fast mode), and SPI reaches up to 8 MHz. This combination allows concurrent sensor reading via I2C and host communication via UART at the same time.
How does STM8S903K3T6C compare to STM8S003K3T6C for a new PCB design?
STM8S903K3T6C and STM8S003K3T6C are pin-compatible in the LQFP-32 package and share the same 16 MHz core and 8 KB flash. The 903 variant adds an enhanced auto-reload timer and additional comparator functionality. If your design uses advanced PWM or analog comparator features, the 903 is preferred; for simpler I/O control without those peripherals, the 003 is often lower cost while remaining drop-in compatible.
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Why Buy from FindMyChip
About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 10+ | $1.5000 | $15.00 |
| 25+ | $1.3500 | $33.75 |
| 50+ | $1.3000 | $65.00 |
| 1000+ | $1.1200 | $1120.00 |
| 1500+ | $1.0900 | $1635.00 |
| 2500+ | $1.0885 | $2721.18 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
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