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STMicroelectronics ST7FL39F2MAE
- Part No.:
- ST7FL39F2MAE
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ST7FL39F2MAE.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,562
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Product details
Overview
ST7FL39F2MAE from STMicroelectronics is an automotive-grade 8-bit microcontroller featuring 8 KB single-voltage XFlash program memory, 384 bytes RAM, 256 bytes data EEPROM with readout protection, 10-bit ADC (7 channels), dual 12-bit autoreload timers with 4 PWM outputs, and integrated LINSCI™ and SPI interfaces. It operates across -40°C to 125°C and supports 5 power-saving modes including Halt and Auto Wakeup from Halt - deployed in body control modules and LIN node controllers.
For engineers reviewing the ST7FL39F2MAE datasheet, ST7FL39F2MAE pinout, ST7FL39F2MAE application, or ST7FL39F2MAE equivalent, this page delivers verified technical context, validated pin functions, automotive-qualified timing and power specifications, and real-world use cases for LIN-based vehicle subsystems.
Technical Context
The ST7FL39F2MAE implements a Harvard-architecture 8-bit CPU core with 63 instructions, 17 addressing modes, and hardware 8×8 unsigned multiply. Its clock system integrates a factory-trimmed 1% internal RC oscillator, optional ×8 PLL for 8 MHz operation, and dual voltage monitoring: enhanced low-voltage detector (LVD) for main supply and auxiliary voltage detector (AVD) with interrupt capability.
Peripheral integration includes a configurable watchdog timer, two 8-bit lite timers (one with real-time base), two 12-bit autoreload timers supporting input capture and output compare, and a LINSCI™ interface compliant with LIN 2.0/2.1 protocols - enabling master/slave node implementation without external transceiver in many configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 8-bit ST7 CPU with 63 instructions, 17 addressing modes, illegal opcode detection |
| Program Memory | 8 KB single-voltage XFlash with IAP/ICP support and readout protection |
| Data Memory | 384 bytes RAM + 256 bytes EEPROM (300K write/erase cycles, 20-year retention @ 55°C) |
| ADC | 10-bit resolution, 7 input channels, integrated sample-and-hold |
| Timers | 2× 12-bit autoreload timers (4 PWM, 4 output compare, 2 input capture); 2× 8-bit lite timers (1 with real-time base) |
| Communication | LINSCI™ (LIN 2.0/2.1 master/slave), SPI master/slave, 12 interrupt vectors + TRAP/reset |
| Supply & Temp | 2.95–5.5 V operation; qualified for -40°C to +125°C ambient (AEC-Q100 Grade 1) |
Pinout & Package
ST7FL39F2MAE is housed in a 20-pin SO20 (300 mil) package with 15 multifunctional bidirectional I/O lines, 7 high-sink outputs, and dedicated pins for LINSCI™ (TXD/RXD), SPI (MOSI/MISO/SCK/SS), reset, clock input, and AVD reference.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Primary 2.95–5.5 V supply rails; decoupling required per automotive EMC guidelines |
| RESET | Asynchronous reset input | Active-low, Schmitt-triggered; initiates full system reset on falling edge |
| OSCIN / OSCOUT | Crystal/resonator interface | Supports 1–8 MHz crystal or ceramic resonator; internal RC oscillator selectable as fallback |
| PA0–PA7 | Port A I/O lines | 8-bit bidirectional port with alternate functions including LINSCI TXD/RXD and SPI signals |
| PD0–PD6 | Port D I/O lines | 7-bit bidirectional port; PD0–PD3 support high-sink capability (20 mA typical) |
Key Features
| Feature | Design Value |
|---|---|
| In-application programming (IAP) | Enables firmware updates over LIN or SPI without external programmer - critical for ECU field reflash |
| LINSCI™ interface | Hardware-accelerated LIN 2.0/2.1 protocol handling with automatic checksum, sync-break detection, and slave response timing compliance |
| Enhanced LVD + AVD | Dual voltage monitoring enables safe power-down sequencing and battery undervoltage recovery in 12 V automotive systems |
| 5 power-saving modes | Halt (0.8 µA), active halt, auto wakeup from halt, wait, and slow modes - optimized for intermittent sensor polling and LIN sleep/wakeup |
| High-sink I/O | 7 pins rated for 20 mA sink current - directly drive LEDs, relays, or small solenoids without external drivers |
Applications
| Body Control Module (BCM) | Door Module Controller |
|---|---|
|
Use Scenario: Centralized management of interior lighting, window lift, mirror adjustment, and door lock actuation in passenger vehicles. IC Role / Device Role / Timing Role: Primary MCU executing LIN slave communication with gateway, ADC sampling for potentiometer inputs, and PWM control of motor drivers. Use Value: Integrated LINSCI™ eliminates need for external transceiver; high-sink I/O drives window motor H-bridge enable lines directly. |
Use Scenario: Local control unit inside vehicle door housing switches, sensors, and actuators with wake-on-LIN capability. IC Role / Device Role / Timing Role: LIN slave node with auto-wakeup from Halt mode upon frame reception; uses AVD to detect battery brownout during engine cranking. Use Value: 0.8 µA Halt current extends battery life during vehicle standby; EEPROM stores seat/mirror position calibration data. |
| Roof Module (Sunroof/Climate) | Seat Position Controller |
|
Use Scenario: Sunroof open/close logic with obstacle detection, tilt control, and climate fan speed regulation via LIN commands. IC Role / Device Role / Timing Role: LIN slave with dual 12-bit timers generating precise PWM for DC fan control and ADC sampling of thermistor and hall-effect sensors. Use Value: 10-bit ADC resolves temperature changes <0.5°C; 4 PWM outputs manage dual-fan differential speed control. |
Use Scenario: Motorized seat position memory system storing user presets and controlling linear actuators via LIN commands. IC Role / Device Role / Timing Role: LIN slave with EEPROM-backed nonvolatile storage for up to 4 seat profiles; uses input capture to monitor encoder pulses for position feedback. Use Value: 256-byte EEPROM retains calibrated positions across 300K cycles; 7-channel ADC monitors seat occupancy and pressure sensors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST7FL39F2M1 | Same die, SO20 package but with different option byte configuration - no AVD interrupt capability enabled | Lacks auxiliary voltage detector interrupt; unsuitable for battery monitoring requiring AVD-triggered wake-up | Select only if AVD functionality is unused and cost optimization is prioritized over design flexibility |
| SPC560B50L5 | 32-bit Power Architecture MCU with CAN FD, higher performance, larger memory, and ASIL-B support | Targets safety-critical powertrain/body domain controllers requiring CAN and functional safety certification | Choose when migrating beyond LIN-only nodes or requiring ISO 26262 compliance - not a drop-in replacement |
Compared with ST7FL39F2MAE, ST7FL39F2M1 omits AVD interrupt capability - limiting its utility in battery-aware wake-up designs - while SPC560B50L5 provides CAN FD and ASIL-B readiness at significantly higher cost and complexity, making it suitable only for next-generation domain controllers.
Availability
ST7FL39F2MAE is available at Aetrix Electronics and suitable for body control modules, door modules, roof modules, and seat position controllers requiring stable component supply in automotive Tier-1 production environments.
Supply support for ST7FL39F2MAE 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 analog devices for automotive, industrial, and consumer markets.
The ST7L3x family - including ST7FL39F2MAE - was engineered specifically for cost-sensitive, LIN-based automotive body electronics, emphasizing robustness, low-power operation, and seamless integration with legacy vehicle networks.
FAQ
Is ST7FL39F2MAE pin-compatible with other ST7L3x variants?
Yes - ST7FL39F2MAE shares the same SO20 (300 mil) footprint and pin assignment with ST7L34, ST7L35, ST7L38, and ST7L39 derivatives. However, memory size, peripheral enablement, and option byte settings differ; verify configuration registers and flash/EEPROM mapping before substitution.
Does ST7FL39F2MAE require an external LIN transceiver?
No - the integrated LINSCI™ interface meets physical layer requirements for LIN 2.0/2.1 slave operation without external transceiver in standard 12 V automotive bus configurations. An external transceiver is required only for master-mode operation at higher bus voltages or extended EMI immunity.
What is the guaranteed data retention for the internal EEPROM?
The 256-byte data EEPROM guarantees 20 years of data retention at +55°C and 300,000 write/erase cycles under specified operating conditions. Retention degrades predictably above 55°C; STMicroelectronics provides derating curves in Section 13.6.3 of Doc ID 11928 Rev 8.
Can the internal RC oscillator be used without calibration for LIN timing?
No - LIN protocol requires ±1.5% baud rate accuracy. The factory-trimmed 1% internal RC oscillator meets this requirement only after applying the stored calibration value from option bytes; uncalibrated use results in >3% error and violates LIN conformance.
ST7FL39F2MAE 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:
- LINbusSCI, SPI
- Peripherals:
- LVD, POR, PWM, WDT
- Number of I/O:
- 15
- Program Memory Size:
- 8KB (8K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 256 x 8
- RAM Size:
- 384 x 8
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 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:
ST7FL39F2MAE FAQ
1.How can I place an order for ST7FL39F2MAE through Aetrix?
Please submit a Request for Quotation (RFQ) for ST7FL39F2MAE 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 ST7FL39F2MAE reliable?
The price and inventory of ST7FL39F2MAE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST7FL39F2MAE is usually 5 days.
3.What payment methods are accepted for ST7FL39F2MAE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST7FL39F2MAE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST7FL39F2MAE?
ST7FL39F2MAE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST7FL39F2MAE 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 ST7FL39F2MAE?
For technical support, including ST7FL39F2MAE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST7FL39F2MAE requirements.
6.How does Aetrix verify that ST7FL39F2MAE is sourced from the original manufacturer or authorized distributors?
All ST7FL39F2MAE 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 ST7FL39F2MAE meets industry standards.
7.What is the process for return or replacement of ST7FL39F2MAE?
All ST7FL39F2MAE units undergo pre-shipment inspection (PSI). If there is an issue with ST7FL39F2MAE, 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 ST7FL39F2MAE part is unused and in its original packaging.
Return procedure for ST7FL39F2MAE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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