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STMicroelectronics ST7FLIT19BF1M3
- Part No.:
- ST7FLIT19BF1M3
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ST7FLIT19BF1M3.pdf
- Description:
- IC MCU 8BIT 4KB FLASH 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,015
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Product details
Overview
ST7FLIT19BF1M3 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 requiring low-power operation and analog signal conditioning.
For engineers reviewing the ST7FLIT19BF1M3 datasheet, ST7FLIT19BF1M3 pinout, ST7FLIT19BF1M3 application, or ST7FLIT19BF1M3 equivalent, key selection criteria include internal 1% RC oscillator accuracy, 20 mA high-sink I/O capability on 7 pins, 5 power-saving modes (Halt, Wait, Slow), and guaranteed 20-year data retention at 55°C for both Flash and EEPROM.
Technical Context
This MCU implements an enhanced ST7 8-bit core with true bit manipulation, 8×8 unsigned multiply, and 17 addressing modes. It integrates a programmable internal voltage reference, analog comparator with interrupt capability, and dual auto-reload timers supporting input capture, output compare, and pulse generation - enabling precise timing control without external components.
The clock system includes internal 1% RC oscillator (1 MHz), optional PLL ×4/×8 for 4/8 MHz internal clocks, external crystal/ceramic resonator support (up to 16 MHz), and 32-MHz input clock for auto-reload timer - allowing flexible trade-offs between precision, power, and BOM cost across battery-powered and mains-operated applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | ST7 8-bit CPU with 63 instructions, illegal opcode detection, and 17 addressing modes - enables compact, deterministic firmware for real-time embedded control. |
| Flash Memory | 4 KB single-voltage XFlash with ICP/IAP, 10K write/erase cycles, 20-year data retention at 55°C - supports field firmware updates and secure code protection. |
| Data EEPROM | 128 bytes with read-out protection, 300K write/erase cycles, 20-year data retention at 55°C - suitable for storing calibration coefficients or device configuration without external NV memory. |
| ADC | 10-bit SAR ADC with 7 input channels, fixed-gain op-amp, 13-bit precision for 0–430 mV range (@5V VDD) - delivers high-resolution analog sensing for low-level sensor signals. |
| Timers | Two 12-bit auto-reload timers (AT4/AT2) with 4 PWM outputs, 1 input capture, 4 output compare, and pulse functions - enables motor control, LED dimming, and time-stamped event logging. |
| I/O Capability | Up to 17 multifunctional bidirectional I/O lines, including 7 high-sink (20 mA) outputs - drives LEDs, relays, or logic-level MOSFETs directly without external drivers. |
| Power Management | Five power-saving modes (Halt, Active-Halt, Auto Wake-up from Halt, Wait, Slow); enhanced LVD + AVD with interrupt - ensures safe shutdown and rapid wake-up in energy-constrained systems. |
Pinout & Package
ST7FLIT19BF1M3 is available in SO20 (300 mil), DIP20, SO16 (300 mil), DIP16, and QFN20 packages. The SO20 and DIP20 variants use identical 20-pin mapping with VDD/VSS power pins, RESET, OSC1/OSC2, and three I/O ports (PA, PB, PC) supporting mixed analog/digital functions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD / VSS | Main power supply / ground | Mandatory connection to stable 2.7–5.5 V supply; all VDD/VSS pins must be decoupled locally to ensure noise immunity and reset stability. |
| RESET | Active-low non-maskable interrupt input | Drives full chip reset; internal pull-up active during reset; requires external debouncing for noisy environments. |
| OSC1 / OSC2 | Crystal/resonator interface | Supports external 32 kHz–16 MHz crystals or ceramic resonators; internal 1% RC oscillator usable when precision timing is not required. |
| PA0–PA7 | Port A I/O with high-sink capability | PA0–PA5 and PA7 support 20 mA sink; PA0/LTIC and PA1/ATIC enable input capture for timing-critical events like encoder pulses. |
| PB0–PB6 | Port B I/O with analog multiplexing | PB0–PB6 serve as ADC inputs (AIN0–AIN6), SPI signals (MOSI/MISO/SCK/SS), and comparator inputs - enabling mixed-signal subsystem integration. |
| PC0 / PC1 | Oscillator control / clock input | PC0 accepts external clock up to 16 MHz; PC1 is oscillator output - allows bypass of crystal for clock distribution or synchronization. |
Key Features
| Feature | Design Value |
|---|---|
| In-Circuit Programming (ICP) | Enables firmware updates via ICC interface without removing MCU from PCB - reduces manufacturing rework and field service costs. |
| In-Application Programming (IAP) | Allows runtime Flash updates from user code - supports over-the-air (OTA) firmware upgrades in connected devices. |
| Debug Module (DM) | Integrated hardware debug support for In-Circuit Debugging (ICD) - eliminates need for external emulators during development and validation. |
| Analog Comparator with Interrupt | Detects voltage thresholds on COMPIN+/− and triggers interrupt - replaces discrete comparator circuits in threshold-detection applications. |
| Programmable Internal Voltage Reference | Stable reference for ADC and comparator - removes dependency on external precision references, simplifying BOM and layout. |
Applications
| Industrial Sensor Node | Smart Thermostat Controller |
|---|---|
|
Use Scenario: Standalone temperature/humidity sensor with local display and wireless telemetry. IC Role / Device Role / Timing Role: Central controller managing ADC sampling, PWM-driven backlight, SPI-connected RF module, and low-power sleep/wake cycles. Use Value: Integrated 10-bit ADC with op-amp and 20-year EEPROM retention eliminate external signal-conditioning ICs and preserve calibration data across product lifetime. |
Use Scenario: Residential HVAC control unit with touch interface, fan speed regulation, and ambient light sensing. IC Role / Device Role / Timing Role: Real-time coordinator for multi-channel ADC reads, 4-channel PWM fan control, and SPI-connected display driver. Use Value: Dual 12-bit auto-reload timers deliver independent, jitter-free PWM outputs for variable-speed blower motors without CPU overhead. |
| Energy Meter Front-End | Motor Control Interface Module |
|
Use Scenario: AC mains monitoring module measuring voltage/current harmonics and reporting via RS-485. IC Role / Device Role / Timing Role: Signal acquisition engine performing synchronized ADC sampling, analog comparator-based zero-crossing detection, and SPI communication. Use Value: Analog comparator with interrupt capability detects zero-crossing events at line frequency (50/60 Hz) with sub-microsecond latency - enabling precise phase alignment. |
Use Scenario: Brushless DC motor commutation interface with Hall-effect sensor inputs and gate driver control. IC Role / Device Role / Timing Role: Timing supervisor generating commutation timing windows using input capture on Hall sensors and PWM outputs to gate drivers. Use Value: PA0/LTIC and PA1/ATIC provide dedicated hardware input capture with timestamp resolution down to 125 ns (at 8 MHz CPU clock) - critical for accurate rotor position tracking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST7FLITE15BF1M3 | 2 KB Flash, no analog comparator, same 256-byte RAM and 128-byte EEPROM - lacks comparator interrupt and one ADC channel. | Suitable for simpler sensor interfaces without threshold-triggered wake-up or dual-rail analog monitoring. | Select when analog comparator functionality is unnecessary and Flash budget is constrained to 2 KB. |
| STM8S003F3P6 | 16 MHz max CPU, 8 KB Flash, 1 KB RAM, 128-byte EEPROM, integrated SWIM debug - newer architecture with higher performance but different peripheral register map. | Better suited for applications requiring faster processing, larger code footprint, or modern toolchain support (e.g., STM32CubeIDE). | Choose for new designs where legacy ST7 toolchain compatibility is not required and higher throughput justifies migration effort. |
Compared with ST7FLIT19BF1M3, the ST7FLITE15BF1M3 reduces feature set to lower cost while retaining core timing and I/O capabilities; the STM8S003F3P6 offers architectural modernization and scalability but requires firmware porting and toolchain transition.
Availability
ST7FLIT19BF1M3 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart thermostat controllers, energy meter front-ends, and motor control interface modules requiring stable component supply, long-term lifecycle support, and guaranteed 20-year data retention.
Supply support for ST7FLIT19BF1M3 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 management ICs, sensors, and analog products for industrial, automotive, and consumer markets.
The ST7LITE1xB family targets cost-sensitive, low-power embedded applications requiring integrated analog peripherals, Flash programmability, and robust operation from −40°C to +125°C - emphasizing simplicity, reliability, and minimal external component count.
FAQ
What is the maximum operating frequency of the ST7FLIT19BF1M3?
The ST7FLIT19BF1M3 supports up to 8 MHz CPU frequency: achieved either with external 16 MHz oscillator and internal ÷2 divider, or with internal 1 MHz RC oscillator plus PLL ×8. Electrical characteristics are guaranteed across the full 2.7–5.5 V supply range and −40°C to +125°C temperature range.
Does the ST7FLIT19BF1M3 support in-application programming (IAP)?
Yes - the ST7FLIT19BF1M3 supports full IAP via its XFlash memory architecture. User firmware can erase and reprogram Flash sectors under software control, enabling field firmware updates without halting system operation or requiring external programming hardware.
How many ADC channels does the ST7FLIT19BF1M3 provide, and what is their resolution?
The ST7FLIT19BF1M3 features a 10-bit successive-approximation ADC with 7 input channels (AIN0–AIN6). Its effective resolution varies by input range: 13-bit precision for 0–430 mV signals and 10-bit precision for 430 mV–5 V signals, both referenced to VDD at 5 V.
Can the ST7FLIT19BF1M3 operate from a single-cell lithium battery?
Yes - the ST7FLIT19BF1M3 operates from 2.7 V to 5.5 V, making it compatible with nominal 3.0–3.7 V single-cell Li-ion/Li-polymer batteries. Its five power-saving modes (including Halt with 1.5 µA typical current) extend battery life in portable and remote sensing applications.
ST7FLIT19BF1M3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Series:
- ST7
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- 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:
- 128 x 8
- 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:
ST7FLIT19BF1M3 FAQ
1.How can I place an order for ST7FLIT19BF1M3 through Aetrix?
Please submit a Request for Quotation (RFQ) for ST7FLIT19BF1M3 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 ST7FLIT19BF1M3 reliable?
The price and inventory of ST7FLIT19BF1M3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST7FLIT19BF1M3 is usually 5 days.
3.What payment methods are accepted for ST7FLIT19BF1M3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST7FLIT19BF1M3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST7FLIT19BF1M3?
ST7FLIT19BF1M3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST7FLIT19BF1M3 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 ST7FLIT19BF1M3?
For technical support, including ST7FLIT19BF1M3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST7FLIT19BF1M3 requirements.
6.How does Aetrix verify that ST7FLIT19BF1M3 is sourced from the original manufacturer or authorized distributors?
All ST7FLIT19BF1M3 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 ST7FLIT19BF1M3 meets industry standards.
7.What is the process for return or replacement of ST7FLIT19BF1M3?
All ST7FLIT19BF1M3 units undergo pre-shipment inspection (PSI). If there is an issue with ST7FLIT19BF1M3, 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 ST7FLIT19BF1M3 part is unused and in its original packaging.
Return procedure for ST7FLIT19BF1M3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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