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STMicroelectronics ST7FLIT15BF1M3
- Part No.:
- ST7FLIT15BF1M3
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ST7FLIT15BF1M3.pdf
- Description:
- IC MCU 8BIT 4KB FLASH 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,681
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Product details
Overview
ST7FLIT15BF1M3 from STMicroelectronics is an 8-bit Flash microcontroller featuring 4 KB XFlash program memory, 256 bytes RAM, 128 bytes data EEPROM with 300K write/erase cycles, 10-bit ADC with integrated op-amp, dual 12-bit auto-reload timers (4 PWM outputs), SPI interface, and analog comparator - deployed in industrial sensor nodes and low-power motor control systems.
For engineers reviewing the ST7FLIT15BF1M3 datasheet, ST7FLIT15BF1M3 pinout, ST7FLIT15BF1M3 application, or ST7FLIT15BF1M3 equivalent, key selection criteria include its 2.7–5.5 V operating range, 8 MHz max CPU frequency (with PLL x4/x8), 17 I/O lines including 7 high-sink (20 mA) outputs, and support for five power-saving modes including Halt and Auto Wake-up from Halt.
Technical Context
The ST7FLIT15BF1M3 implements an enhanced ST7 8-bit core with 63 instructions, true bit manipulation, and 17 addressing modes. Its clock system integrates a factory-trimmed 1% internal RC oscillator, optional PLL (x4/x8), and external crystal/ceramic resonator support up to 16 MHz.
Peripheral architecture includes two independent 12-bit auto-reload timers (AT4 and AT2) with input capture, output compare, and pulse generation; one Lite Timer with watchdog capability; and a 10-bit ADC with programmable gain op-amp and 7 analog input channels - all accessible via dedicated I/O pins with configurable pull-up, interrupt, and analog modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | ST7 8-bit CPU with 63 instructions, 17 addressing modes, and illegal opcode detection |
| Flash Memory | 4 KB single-voltage XFlash with ICP/IAP, 10K write/erase cycles, 20-year data retention at 55°C |
| Data EEPROM | 128 bytes with read-out protection, 300K write/erase cycles, 20-year data retention at 55°C |
| ADC Resolution | 10-bit precision over 430 mV–5 V range; 13-bit precision over 0–430 mV range (at 5 V VDD) |
| Timers | Dual 12-bit auto-reload timers (4 PWM outputs, 1 input capture, 4 output compare), 1 Lite Timer with WDG |
| I/O Capability | Up to 17 multifunctional bidirectional I/O lines; 7 pins support 20 mA high-sink output |
| Power Modes | Five low-power modes: Halt, Active-Halt, Auto Wake-up from Halt, Wait, Slow - enabling µA-level standby current |
Pinout & Package
ST7FLIT15BF1M3 is available in SO20 (300 mil), DIP20, SO16 (300 mil), DIP16, and QFN20 packages. Pin functions are validated per ST's official datasheet Rev 6 (June 2008), with consistent mapping across SO20/DIP20 variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD / VSS | Power supply / Ground | Mandatory connection to main supply and ground; all VDD/VSS pins must be externally connected |
| RESET | Reset input | Active-low non-maskable interrupt; initiates hardware reset and clears internal registers |
| PA0–PA7 | Port A I/O | Includes LTIC (Lite Timer input capture), ATIC (auto-reload timer input capture), ATPWM0–3, COMPOUT, MCO, ICCCLK, BREAK - all support HS (20 mA sink) |
| PB0–PB6 | Port B I/O | 7-channel ADC inputs (AIN0–AIN6), SPI signals (MOSI/MISO/SCK/SS), COMPIN+/−, CLKIN - configurable as analog, interrupt, or digital |
| PC0/PC1 | Oscillator interface | Crystal/resonator connections (OSC1/OSC2) or external clock input (CLKIN); PC0 also serves as ICC programming pin |
Key Features
| Feature | Design Value |
|---|---|
| In-Circuit Programming (ICP) | Enables field firmware updates without removing MCU; uses ICCCLK/ICCDATA pins on PA6/PA5 |
| Auto-reload Timers with PWM | Two 12-bit timers deliver precise 4-channel PWM for motor gate drive or LED dimming with independent duty-cycle control |
| Analog Comparator + Op-Amp | Integrated comparator with programmable reference and rail-to-rail op-amp supports threshold detection and signal conditioning without external components |
| Enhanced Low-Voltage Supervisor | LVD + auxiliary voltage detector (AVD) generate interrupts for safe power-down sequencing during brown-out conditions |
| Debug Module (DM) | On-chip DM enables full In-Circuit Debugging (ICD) with breakpoints, register inspection, and real-time variable monitoring |
Applications
| Industrial Sensor Node | Brushless DC Motor Control |
|---|---|
Use Scenario: Standalone temperature/humidity node with local ADC sampling, SPI-connected sensor fusion, and periodic wireless wake-up. IC Role / Device Role / Timing Role: Central controller managing ADC conversions, SPI peripheral coordination, and low-power mode transitions using Auto Wake-up from Halt. Use Value: 300K-cycle EEPROM stores calibration coefficients; 20 mA sink outputs drive status LEDs directly; 5 power modes extend battery life beyond 2 years. | Use Scenario: 3-phase BLDC commutation in fan/pump drivers with hall-effect feedback and closed-loop speed regulation. IC Role / Device Role / Timing Role: Real-time PWM generator with synchronized input capture for hall sensor edge timing and phase alignment. Use Value: Dual 12-bit auto-reload timers provide sub-microsecond PWM resolution and jitter-free commutation timing; HS outputs drive gate drivers without buffers. |
| Smart Power Outlet | Programmable Logic Controller (PLC) I/O Module |
Use Scenario: AC outlet with energy monitoring, relay control, and RS-485 communication via SPI-to-UART bridge. IC Role / Device Role / Timing Role: System manager handling ADC-based current sensing, relay actuation timing, and SPI-based UART interface control. Use Value: Integrated op-amp amplifies shunt voltage for accurate current measurement; 4 KB Flash accommodates Modbus RTU stack and safety logic. | Use Scenario: DIN-rail mounted I/O expansion module with discrete input debouncing, output latching, and CAN bus gateway (via external transceiver). IC Role / Device Role / Timing Role: Deterministic I/O scheduler using Lite Timer and auto-reload timers for 10 ms scan cycle timing and interrupt-driven edge detection. Use Value: 17 I/O lines support 12 digital inputs + 5 outputs; 128-byte EEPROM retains configuration and fault logs across power cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST7FLITE29F2M3 | 8 KB Flash, 384 bytes RAM, adds UART, higher pin count (28-pin), no QFN option | Supports serial protocol stacks (e.g., Modbus ASCII); requires PCB redesign for larger footprint | Select when UART is required and board space allows SO28/DIP28 |
| STM8S003F3P6 | 16 MHz max CPU, 8 KB Flash, 1 KB RAM, enhanced ADC (10-bit, 10 ch), no analog comparator or op-amp | Better performance for compute-intensive tasks; lacks integrated signal conditioning for analog front-end | Select for higher throughput where external op-amp/comparator acceptable |
Compared with ST7FLIT15BF1M3, the ST7FLITE29F2M3 extends memory and adds UART but increases package size, while the STM8S003F3P6 delivers higher clock speed and RAM at the cost of analog subsystem integration - making ST7FLIT15BF1M3 optimal for cost-sensitive, analog-rich, ultra-low-power embedded control.
Availability
ST7FLIT15BF1M3 is available at Aetrix Electronics and suitable for industrial sensor nodes, brushless DC motor control, smart power outlets, and PLC I/O modules requiring stable component supply across extended product lifecycles.
Supply support for ST7FLIT15BF1M3 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, power ICs, sensors, and automotive-grade components since 1987.
The ST7LITE1xB series was engineered for cost-optimized, low-power 8-bit control in industrial and consumer applications - emphasizing flash endurance, analog integration, and robust power management without external support circuitry.
FAQ
What is the maximum operating frequency of the ST7FLIT15BF1M3?
The ST7FLIT15BF1M3 achieves up to 8 MHz CPU frequency: either from an external 16 MHz crystal with internal /2 divider, or from its internal 1 MHz RC oscillator multiplied by PLL (x4 or x8). The 32 MHz internal clock feeds only the auto-reload timer's prescaler and does not drive the CPU core.
Does the ST7FLIT15BF1M3 support in-application programming (IAP)?
Yes - the ST7FLIT15BF1M3 supports full In-Application Programming of its 4 KB XFlash memory. Firmware can reprogram designated Flash sectors while executing from other regions, enabling field-upgradable features and bootloader implementations without halting system operation.
How many analog input channels does the integrated ADC support?
The ST7FLIT15BF1M3 ADC supports 7 analog input channels (AIN0–AIN6), mapped to PB0–PB6 pins. All channels share the same 10-bit conversion engine with dual-range operation: 13-bit effective resolution for low-voltage signals (0–430 mV) and 10-bit for full-scale (430 mV–5 V) at 5 V VDD.
Can the ST7FLIT15BF1M3 operate reliably at 2.7 V supply?
Yes - the ST7FLIT15BF1M3 is fully specified from 2.7 V to 5.5 V across its entire −40°C to +85°C industrial temperature range. Its enhanced low-voltage supervisor (LVD) ensures deterministic reset behavior down to 2.5 V, and all peripherals (ADC, timers, SPI) retain full functionality at 2.7 V.
ST7FLIT15BF1M3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Series:
- ST7
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- ST7
- Core Size:
- 8-Bit
- Speed:
- 8MHz
- Connectivity:
- SPI
- Peripherals:
- LVD, POR, PWM, WDT
- Number of I/O:
- 17
- Program Memory Size:
- 4KB (4K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 256 x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 7x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
ST7FLIT15BF1M3 FAQ
1.How can I place an order for ST7FLIT15BF1M3 through Aetrix?
Please submit a Request for Quotation (RFQ) for ST7FLIT15BF1M3 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 ST7FLIT15BF1M3 reliable?
The price and inventory of ST7FLIT15BF1M3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST7FLIT15BF1M3 is usually 5 days.
3.What payment methods are accepted for ST7FLIT15BF1M3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST7FLIT15BF1M3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST7FLIT15BF1M3?
ST7FLIT15BF1M3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST7FLIT15BF1M3 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 ST7FLIT15BF1M3?
For technical support, including ST7FLIT15BF1M3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST7FLIT15BF1M3 requirements.
6.How does Aetrix verify that ST7FLIT15BF1M3 is sourced from the original manufacturer or authorized distributors?
All ST7FLIT15BF1M3 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 ST7FLIT15BF1M3 meets industry standards.
7.What is the process for return or replacement of ST7FLIT15BF1M3?
All ST7FLIT15BF1M3 units undergo pre-shipment inspection (PSI). If there is an issue with ST7FLIT15BF1M3, 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 ST7FLIT15BF1M3 part is unused and in its original packaging.
Return procedure for ST7FLIT15BF1M3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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