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STMicroelectronics ST7FLIT19BF1U6
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- Part No.:
- ST7FLIT19BF1U6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 20-VQFN Exposed Pad
- Datasheet:
-
ST7FLIT19BF1U6.pdf
- Description:
- IC MCU 8BIT 4KB FLASH 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,624
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Product details
Overview
ST7FLIT19BF1U6 from STMicroelectronics is an 8-bit Flash microcontroller featuring 4 KB XFlash program memory, 256 bytes RAM, 128 bytes data EEPROM, 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 mixed-signal control.
For engineers reviewing the ST7FLIT19BF1U6 datasheet, ST7FLIT19BF1U6 pinout, ST7FLIT19BF1U6 application, or ST7FLIT19BF1U6 equivalent, key selection criteria include 2.7–5.5 V supply range, 8 MHz max CPU frequency (with PLL x4/x8), -40°C to +85°C operating temperature, SO20/DIP20/QFN20 package compatibility, and ICP/IAP flash programming support.
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 1% internal RC oscillator, optional PLL for 4/8 MHz clock generation, and five power-saving modes (Halt, Active-Halt, Auto Wake-up, Wait, Slow) managed via dedicated reset and low-voltage supervisor circuitry.
The peripheral set includes two 12-bit auto-reload timers supporting input capture, output compare, and pulse generation; one 8-bit Lite Timer with watchdog; SPI synchronous serial interface; and a 7-channel 10-bit ADC with programmable gain op-amp and analog comparator - all accessible through configurable multifunction I/O ports with 7 high-sink (20 mA) outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | Enhanced 8-bit ST7 CPU with 63 instructions and 17 addressing modes |
| 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 |
| CPU Frequency | Up to 8 MHz (via external 16 MHz crystal or internal 1 MHz RC + PLL ×4/×8) |
| ADC Resolution | 10-bit precision over 430 mV–5 V range; 13-bit precision over 0–430 mV range (at 5 V VDD) |
| Supply Voltage | 2.7 V to 5.5 V - supports direct connection to standard industrial logic rails |
| Operating Temp | -40°C to +85°C - qualified for extended industrial environments |
| I/O Capability | Up to 17 bidirectional I/O lines; 7 pins support 20 mA high-sink drive for LED/relay control |
Pinout & Package
ST7FLIT19BF1U6 is available in SO20 (300 mil), DIP20, and QFN20 packages. All variants share identical pin functionality and electrical characteristics per STMicroelectronics' official documentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD / VSS | Power supply / Ground | Dual VDD/VSS pairs ensure stable core and I/O rail decoupling; mandatory connection per datasheet |
| PA0–PA7 | Port A I/O | PA0–PA7 support high-sink (20 mA) outputs; PA0/LTIC and PA1/ATIC enable timer input capture |
| PB0–PB6 | Port B I/O | PB0–PB6 provide 7 ADC inputs (AIN0–AIN6); PB0 also serves as SPI SS, PB1–PB3 as SPI SCK/MISO/MOSI |
| PC0/OSC1, PC1/OSC2 | Crystal oscillator interface | Supports external crystal/resonator up to 16 MHz or external clock input on PC0 |
| RESET | Active-low reset input | Non-maskable interrupt input; internal pull-up active during reset; requires external debouncing for noisy environments |
| COMPIN+, COMPIN- | Analog comparator inputs | Enable voltage comparison with internal reference or external thresholds; COMPIN+ doubles as AIN0, COMPIN- as AIN4/CLKIN |
| MCO / ICCCLK / BREAK | Debug and clock output | PA6 provides main clock output, ICC communication clock, or external break signal - requires 10 kΩ external pull-up |
Key Features
| Feature | Design Value |
|---|---|
| In-Circuit Programming (ICP) | Enables field firmware updates without removing MCU from PCB via dedicated ICC pins (PA6/PA5/PC0) |
| In-Application Programming (IAP) | Allows runtime reprogramming of Flash sectors while executing code from other memory regions |
| Auto-reload Timers with PWM | Two 12-bit timers deliver four independent PWM outputs with precise duty-cycle control for motor/servo drive |
| Integrated Op-Amp + ADC | On-chip op-amp buffers weak sensor signals before 10-bit ADC conversion - eliminates external signal conditioning |
| Low-Voltage Supervisor (LVD) | Detects brown-out conditions on main supply and triggers safe shutdown or interrupt-driven recovery sequence |
| Five Power-Saving Modes | Halt mode draws <1 µA; Auto Wake-up enables periodic sensor sampling without host intervention |
Applications
| Industrial Sensor Node | Smart HVAC Actuator |
|---|---|
Use Scenario: Standalone temperature/humidity node with local ADC sampling, SPI-connected environmental sensors, and battery-backed EEPROM logging. IC Role / Device Role / Timing Role: Primary controller managing sensor acquisition, data preprocessing, low-power scheduling, and nonvolatile storage. Use Value: Integrated 10-bit ADC + op-amp eliminates external signal chain; 300K EEPROM endurance ensures >10 years of daily log writes. | Use Scenario: Zone damper control unit with PWM-driven stepper motor, analog feedback, and RS-485 communication via external transceiver. IC Role / Device Role / Timing Role: Real-time actuator controller coordinating PWM timing, analog feedback loop, and interrupt-driven comms handling. Use Value: Four PWM outputs drive dual-coil stepper; analog comparator monitors end-stop limits; 20 mA sink capability drives indicator LEDs directly. |
| Programmable Logic Controller (PLC) I/O Module | Energy Meter Front-End |
Use Scenario: DIN-rail mounted digital I/O expansion module with opto-isolated inputs, relay drivers, and Modbus RTU over UART (via external level shifter). IC Role / Device Role / Timing Role: Local intelligence layer handling input debouncing, output state management, and protocol framing. Use Value: 7 high-sink outputs directly drive relay coils; SPI interface connects to external UART-to-Modbus bridge IC. | Use Scenario: Residential electricity meter measuring voltage/current via shunt/CT, computing RMS values, and storing tariff data. IC Role / Device Role / Timing Role: Analog front-end processor performing synchronized sampling, gain calibration, and EEPROM-based energy accumulation. Use Value: 13-bit ADC precision at low input range improves accuracy for millivolt-level current sensing; 20-year EEPROM retention secures billing history. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST7FLITE29F2U6 | 8 KB Flash, 384 bytes RAM, adds UART interface and enhanced debug module | Required when serial communication (e.g., Modbus ASCII) is needed alongside existing peripherals | Select if UART integration reduces BOM count and board space vs. adding external UART bridge |
| STM8S003F3P6 | 16 MHz max CPU, 8 KB Flash, 1 KB RAM, no analog comparator, different pinout and register map | Suitable for cost-sensitive designs where higher throughput offsets loss of comparator and EEPROM endurance | Prefer when migrating legacy ST7 code is not required and higher performance justifies architectural change |
Compared with ST7FLIT19BF1U6, ST7FLITE29F2U6 adds UART and larger memory but shares identical ADC, timer, and power architecture; STM8S003F3P6 offers higher speed and density but lacks analog comparator and has lower EEPROM write endurance (100K vs. 300K cycles).
Availability
ST7FLIT19BF1U6 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart HVAC actuators, PLC I/O modules, and energy meter front-ends requiring stable component supply across long-lifecycle deployments.
Supply support for ST7FLIT19BF1U6 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, delivering microcontrollers, power devices, sensors, and analog ICs for industrial, automotive, and consumer markets.
The ST7LITE1xB series was designed specifically for cost-optimized, low-power embedded control applications requiring integrated analog peripherals, Flash flexibility, and robust industrial qualification - targeting sensor interfaces, appliance control, and building automation.
FAQ
What debug interfaces does ST7FLIT19BF1U6 support?
ST7FLIT19BF1U6 supports In-Circuit Communication (ICC) via three dedicated pins: PA5 (ICCDATA), PA6 (ICCCLK), and PC0 (ICCEN/CLKIN). It includes an on-chip Debug Module (DM) enabling full In-Circuit Debugging (ICD) with breakpoints, register inspection, and memory access - no external JTAG adapter required.
Can the internal op-amp be used independently of the ADC?
Yes - the integrated op-amp can operate in standalone mode with user-configurable gain and output routed to any GPIO (e.g., PA7/COMPOUT) or internally to the ADC input. Its offset and bandwidth are characterized per datasheet Section 13.12, and it remains functional even when ADC is disabled.
How is Flash memory protected against unauthorized read-out?
Read-out protection is implemented via Option Bytes programmed into dedicated Flash locations. When enabled, it prevents external access to Flash contents via ICC interface and blocks execution of ICP/IAP commands - verified by hardware lock bits that persist across power cycles and resets.
Does ST7FLIT19BF1U6 support external interrupts on all I/O pins?
No - only 15 external interrupt lines are available, mapped across four vectors (ei0–ei3). Pins PA0, PA1, PA3, PA5, PB0, PB3, PB4, and PA7 are explicitly assigned to these vectors per datasheet Table 1; other I/O pins lack dedicated interrupt capability and require polling or peripheral-triggered wake-up.
ST7FLIT19BF1U6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 20-VQFN Exposed Pad
- Series:
- ST7
- Packaging:
- Tray
- 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:
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
ST7FLIT19BF1U6 FAQ
1.How can I place an order for ST7FLIT19BF1U6 through Aetrix?
Please submit a Request for Quotation (RFQ) for ST7FLIT19BF1U6 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 ST7FLIT19BF1U6 reliable?
The price and inventory of ST7FLIT19BF1U6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST7FLIT19BF1U6 is usually 5 days.
3.What payment methods are accepted for ST7FLIT19BF1U6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST7FLIT19BF1U6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST7FLIT19BF1U6?
ST7FLIT19BF1U6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST7FLIT19BF1U6 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 ST7FLIT19BF1U6?
For technical support, including ST7FLIT19BF1U6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST7FLIT19BF1U6 requirements.
6.How does Aetrix verify that ST7FLIT19BF1U6 is sourced from the original manufacturer or authorized distributors?
All ST7FLIT19BF1U6 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 ST7FLIT19BF1U6 meets industry standards.
7.What is the process for return or replacement of ST7FLIT19BF1U6?
All ST7FLIT19BF1U6 units undergo pre-shipment inspection (PSI). If there is an issue with ST7FLIT19BF1U6, 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 ST7FLIT19BF1U6 part is unused and in its original packaging.
Return procedure for ST7FLIT19BF1U6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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