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STMicroelectronics ST7FL34F2MAE
- Part No.:
- ST7FL34F2MAE
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ST7FL34F2MAE.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,473
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Product details
Overview
ST7FL34F2MAE from STMicroelectronics is an 8-bit automotive-grade MCU featuring 8 KB single-voltage XFlash program memory, 384 bytes RAM, 256 bytes data EEPROM, 10-bit ADC with 7 channels, dual 12-bit autoreload timers (4 PWM outputs), LINSCI™ master/slave interface, SPI, and enhanced low-voltage supervision for safe power-down. It targets body control modules and LIN node controllers in 12 V automotive systems.
For engineers reviewing the ST7FL34F2MAE datasheet, ST7FL34F2MAE pinout, ST7FL34F2MAE application, or ST7FL34F2MAE equivalent, this page delivers verified technical context, validated pin functions, automotive-qualified timing and power management features, and real-world LIN/ADC/PWM use cases - all grounded in ST's official Doc ID 11928 Rev 8 specification.
Technical Context
The ST7FL34F2MAE implements a Harvard-architecture 8-bit CPU with 63 instructions, illegal opcode detection, and 17 addressing modes. Its clock system integrates a factory-trimmed 1% internal RC oscillator, optional x8 PLL (enabling 8 MHz operation), and support for crystal/ceramic resonators or external clock input.
Power integrity is enforced via dual voltage monitoring: an enhanced low-voltage detector (LVD) on the main supply and an auxiliary voltage detector (AVD) with interrupt capability. Five power-saving modes - Halt, Active Halt, Auto Wakeup from Halt, Wait, and Slow - are managed by the Reset Sequence Manager (RSM) and System Integrity (SI) module.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 8-bit ST7 CPU with 63 instructions, 17 addressing modes, and illegal opcode reset |
| 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 at 55°C) |
| ADC | 10-bit SAR converter with 7 input channels and configurable sampling rate |
| Timers | Two 12-bit autoreload timers (4 PWM outputs, 4 output compare, 2 input capture) + two 8-bit lite timers |
| Communication | LINSCI™ (LIN 2.0/SAE J2602 compliant master/slave) + SPI master/slave interface |
| Supply & Safety | Operating range: 2.95–5.5 V; LVD threshold: 4.25 V ±2%; AVD interrupt threshold: 2.5 V ±5% |
Pinout & Package
ST7FL34F2MAE is housed in a SO20 300-mil (7.5 mm × 12.8 mm) plastic small-outline package with 20 leads, lead pitch of 1.27 mm, and surface-mount compatibility. Pin functions are validated per ST's Doc ID 11928 Rev 8 Section 2 (Pin description).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main power supply | Connects to 2.95–5.5 V automotive rail; powers core, peripherals, and I/O |
| VSS | GND reference | Digital ground return path; must be low-impedance for ADC and timer stability |
| RESET | Asynchronous reset input | Active-low pin triggering hardware reset; supports external pull-up and debouncing |
| OSCIN / OSCOUT | Crystal/resonator interface | Accepts 1–8 MHz crystal or ceramic resonator; enables precise timing for LIN baud generation |
| PA0–PA7 | Port A bidirectional I/O | 8-bit port with high-sink capability (20 mA per pin); supports LINSCI TX/RX alternate function on PA0/PA1 |
| PD0–PD6 | Port D bidirectional I/O | 7-bit port; PD0–PD3 support ADC channel inputs (ADC0–ADC3); PD4–PD6 support timer PWM outputs |
Key Features
| Feature | Design Value |
|---|---|
| LINSCI™ interface | Fully compliant LIN 2.0/SAE J2602 master and slave mode with automatic sync-break detection and checksum handling |
| Enhanced LVD + AVD | Dual voltage monitoring with independent interrupt vectors enables layered fail-safe shutdown (e.g., disable PWM before brownout) |
| XFlash memory security | Readout protection and Flash write/erase protection prevent unauthorized firmware extraction or corruption during field updates |
| High-sink I/O | 7 pins rated for 20 mA sink current - directly drive LEDs, relays, or discrete transistors without external drivers |
| Auto wakeup from Halt | Configurable wake sources include LIN bus activity, external interrupt, or timer event - enabling ultra-low-power node listening |
Applications
| Body Control Module (BCM) | LIN Door Node Controller |
|---|---|
|
Use Scenario: Centralized control of interior lighting, window lifts, mirror adjustment, and door lock actuators in entry-level vehicles. IC Role / Device Role / Timing Role: Primary LIN slave node coordinating with master BCM; executes real-time PWM dimming and ADC-based position sensing. Use Value: Integrated LINSCI™ eliminates external transceiver; 20 mA sink I/O drives solenoids directly; EEPROM stores calibration data across ignition cycles. |
Use Scenario: Distributed door module managing local switches, sensors, and actuators while communicating over LIN bus to central ECU. IC Role / Device Role / Timing Role: Standalone LIN slave with auto-wakeup on bus activity; uses ADC to monitor switch states and timer PWM for motor control. Use Value: Low-power Halt mode (<1 µA) extends battery life during vehicle sleep; AVD-triggered interrupt ensures safe shutdown during voltage sag. |
| Roof Console Switch Panel | Seat Position Memory Module |
|
Use Scenario: Occupant-controlled overhead console with ambient lighting, sunroof control, and map light dimming. IC Role / Device Role / Timing Role: LIN slave node interpreting switch inputs and generating smooth 10-bit PWM for LED brightness control. Use Value: On-chip 10-bit ADC reads potentiometer wiper voltage; XFlash enables field-upgradable lighting profiles; EEPROM retains user preferences. |
Use Scenario: Memory seat controller storing and recalling multiple seat/mirror positions using nonvolatile storage and motor feedback. IC Role / Device Role / Timing Role: Dedicated LIN slave with integrated 12-bit timer PWM for motor speed regulation and ADC for potentiometer position sensing. Use Value: Dual 12-bit autoreload timers provide synchronized PWM and input capture for closed-loop motor control; 256-byte EEPROM retains up to 4 seat profiles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit automotive MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST7FL34F2M1 | Same die, but in QFN20 package (5 × 5 mm, 0.5 mm pitch); no SO20 footprint compatibility | Preferred for space-constrained PCBs; requires re-layout due to different thermal pad and pinout | Select when board area is critical and thermal performance justifies QFN rework. |
| STM8AF5269 | 32 KB Flash, 2 KB RAM, enhanced LIN peripheral, higher clock speed (24 MHz), but no XFlash IAP support | Better suited for next-gen LIN nodes requiring larger code size or CAN coexistence; not drop-in compatible | Choose for new designs needing extended memory, faster execution, or future CAN integration. |
Compared with ST7FL34F2MAE, ST7FL34F2M1 offers identical functionality in a smaller QFN package but demands PCB redesign, while STM8AF5269 provides greater scalability and modern peripherals at the cost of legacy toolchain compatibility and lack of in-application Flash programming.
Availability
ST7FL34F2MAE is available at Aetrix Electronics and suitable for automotive body electronics, LIN network nodes, and embedded control systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned qualification evidence.
Supply support for ST7FL34F2MAE 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 silicon for industrial and transportation markets.
The ST7 family was engineered specifically for cost-sensitive, safety-aware automotive body electronics - emphasizing robustness under voltage transients, integrated LIN communication, and low-power operation in always-on vehicle domains.
FAQ
Is ST7FL34F2MAE qualified for automotive use?
Yes. ST7FL34F2MAE is designed and tested for automotive applications per ST's internal qualification standards aligned with AEC-Q100 stress test requirements. It operates across –40°C to +125°C ambient temperature, supports ISO 7637-2 pulse testing, and includes LVD/AVD circuitry for robust power failure response - documented in Doc ID 11928 Rev 8 Sections 7.5 and 7.6.
Does ST7FL34F2MAE support in-application programming (IAP)?
Yes. The device implements full IAP capability via its ICC (In-Circuit Communication) interface using dedicated command sequences. This allows firmware updates while the MCU remains operational - critical for LIN node field upgrades. IAP is enabled only when readout protection is disabled, and requires proper option byte configuration per Section 4.3.2 of the reference document.
What LIN protocol versions does the LINSCI™ interface support?
The LINSCI™ peripheral supports LIN 2.0 and SAE J2602 specifications in both master and slave modes. It handles automatic sync-break detection, identifier filtering, checksum calculation (classic and enhanced), and configurable baud rates from 1.2 to 20 kbps - all verified in Section 11.5 of Doc ID 11928 Rev 8.
Can ST7FL34F2MAE operate without an external crystal?
Yes. The MCU boots and runs reliably using its factory-trimmed internal 1% RC oscillator, eliminating need for external timing components. The optional x8 PLL can boost internal clock to 8 MHz. External crystals (1–8 MHz) are supported for higher precision - e.g., LIN baud accuracy - but are not required for basic operation or sleep-mode wake events.
ST7FL34F2MAE 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:
- -
- 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:
ST7FL34F2MAE FAQ
1.How can I place an order for ST7FL34F2MAE through Aetrix?
Please submit a Request for Quotation (RFQ) for ST7FL34F2MAE 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 ST7FL34F2MAE reliable?
The price and inventory of ST7FL34F2MAE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST7FL34F2MAE is usually 5 days.
3.What payment methods are accepted for ST7FL34F2MAE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST7FL34F2MAE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST7FL34F2MAE?
ST7FL34F2MAE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST7FL34F2MAE 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 ST7FL34F2MAE?
For technical support, including ST7FL34F2MAE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST7FL34F2MAE requirements.
6.How does Aetrix verify that ST7FL34F2MAE is sourced from the original manufacturer or authorized distributors?
All ST7FL34F2MAE 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 ST7FL34F2MAE meets industry standards.
7.What is the process for return or replacement of ST7FL34F2MAE?
All ST7FL34F2MAE units undergo pre-shipment inspection (PSI). If there is an issue with ST7FL34F2MAE, 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 ST7FL34F2MAE part is unused and in its original packaging.
Return procedure for ST7FL34F2MAE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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