My Inquiry
My Account
STMicroelectronics ST7FL35F2MAE
- Part No.:
- ST7FL35F2MAE
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ST7FL35F2MAE.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,293
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ST7FL35F2MAE from STMicroelectronics is an 8-bit automotive-grade MCU 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 vehicle lighting and sensor interfacing.
For engineers reviewing the ST7FL35F2MAE datasheet, ST7FL35F2MAE pinout, ST7FL35F2MAE application, or ST7FL35F2MAE equivalent, this page delivers verified technical context, validated pin functions, automotive-grade timing and power management specs, and real-world LIN bus node implementation guidance - all grounded in ST's official Doc ID 11928 Rev 8.
Technical Context
The ST7FL35F2MAE 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/resonator or external clock inputs.
Interrupt handling includes 10 vectors plus TRAP and reset, with 12 external interrupt lines mapped across 4 vectors. The LINSCI™ interface supports both master and slave LIN 2.0/2.1 communication with automatic baud rate detection and sync field processing, while the SPI operates in full-duplex master/slave mode with programmable phase/polarity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 8-bit ST7 CPU with 63 instructions, 17 addressing modes, and illegal opcode reset - enables deterministic real-time control in safety-critical automotive subsystems. |
| Program Memory | 8 KB single-voltage XFlash with IAP/ICP capability and readout protection - allows field firmware updates without external programmer. |
| Data Memory | 384 bytes RAM + 256 bytes EEPROM (300K write/erase cycles, 20-year retention at 55°C) - supports robust parameter storage in harsh environments. |
| ADC | 10-bit SAR ADC with 7 input channels - provides sufficient resolution for analog sensor monitoring (e.g., temperature, voltage, potentiometer feedback). |
| Timers | Two 12-bit autoreload timers (4 PWM outputs, input capture, output compare) + two 8-bit lite timers - enables precise motor control, LED dimming, and real-time base generation. |
| Communication | LINSCI™ (LIN 2.0/2.1 master/slave) + SPI - delivers native automotive serial networking and peripheral bridging without external transceivers. |
| Supply & Temp | 2.95–5.5 V operating range, -40°C to +125°C ambient - qualified for under-hood and cabin-mounted automotive ECUs. |
Pinout & Package
ST7FL35F2MAE is housed in a 20-pin SO20 (300 mil) package with 15 multifunctional I/O lines, including 7 high-sink outputs capable of 20 mA per pin. Pin functions are validated per ST's official pin description (Section 2, Doc ID 11928 Rev 8).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual supply pins enabling stable core and I/O operation across full automotive voltage range. |
| RESET | Asynchronous reset input | Active-low pin supporting external reset assertion and internal LVD/WDT reset propagation. |
| OSCIN/OSCOUT | Crystal/resonator interface | Supports 1–8 MHz external crystal or ceramic resonator for precise timing-critical LIN baud rate generation. |
| PA0–PA7 | Port A bidirectional I/O | 8-bit port with alternate functions including LINSCI TX/RX, SPI SCK/MOSI/MISO, and timer capture/compare signals. |
| PD0–PD6 | Port D bidirectional I/O | 7-bit port supporting ADC inputs (AD0–AD6), external interrupts, and general-purpose digital I/O with high-sink capability. |
Key Features
| Feature | Design Value |
|---|---|
| Enhanced reset system | Combines asynchronous RESET pin, internal LVD reset, watchdog reset, and power-on reset - ensures reliable boot under voltage transients. |
| Low-voltage supervision | Integrated main-supply LVD and auxiliary AVD with interrupt capability - enables safe power-down sequencing and brown-out recovery. |
| Power efficiency | Five low-power modes (Halt, Active Halt, Auto Wakeup from Halt, Wait, Slow) with sub-μA current in Halt - extends battery life in always-on LIN nodes. |
| LIN protocol engine | Hardware-accelerated LINSCI™ with auto-sync detection, checksum validation, and frame timeout - reduces CPU load and improves bus reliability. |
| In-application programming | XFlash supports IAP via LIN or SPI - enables over-the-air firmware updates without removing MCU from PCB. |
Applications
| Body Control Module | LIN Slave Node |
|---|---|
Use Scenario: Centralized control of door locks, window lifts, and interior lighting in modern vehicles. IC Role / Device Role / Timing Role: Primary MCU executing CAN/LIN gateway logic, sensor polling, and actuator drive sequencing. Use Value: Integrated LINSCI™ eliminates need for external transceiver; 7-channel ADC monitors switch states and ambient light sensors directly. |
Use Scenario: Distributed seat position memory or mirror adjustment module communicating over LIN bus. IC Role / Device Role / Timing Role: LIN slave node with hardware-assisted frame reception/transmission and auto-baud synchronization. Use Value: Low-power Halt mode with Auto Wakeup on LIN header enables <10 μA standby current while maintaining bus responsiveness. |
| Engine Bay Sensor Interface | Automotive Lighting Controller |
Use Scenario: Monitoring coolant temperature, oil pressure, and intake air temperature in high-temperature engine compartments. IC Role / Device Role / Timing Role: Analog front-end MCU acquiring and conditioning sensor signals before CAN transmission. Use Value: 10-bit ADC with 7 channels and guaranteed 20-year EEPROM retention stores calibration offsets across vehicle lifetime. |
Use Scenario: Adaptive LED headlight dimming and dynamic rear lighting with PWM-driven brightness control. IC Role / Device Role / Timing Role: PWM generator and thermal monitor using dual 12-bit autoreload timers and internal temperature sensing. Use Value: Four independent PWM outputs enable simultaneous control of multiple LED strings with 0.1% duty cycle resolution. |
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 |
|---|---|---|---|
| ST7FL35F2M3 | Same die, SO20 package but with 3.3 V-only supply (2.7–3.6 V) and reduced temp range (-40°C to 105°C) | Suitable for non-under-hood applications where 5 V tolerance and 125°C operation are not required | Select when system supply is regulated 3.3 V and extended temperature qualification is unnecessary. |
| STM8AF5269 | 32 MHz STM8 core, 32 KB Flash, enhanced LIN peripheral, higher integration (CAN, more timers), 1.8–5.5 V supply | Drop-in upgrade path offering higher performance, CAN capability, and extended peripheral set for next-gen ECU designs | Choose for new designs requiring CAN+LIN coexistence or >8 KB code space; requires toolchain migration. |
Compared with ST7FL35F2MAE, ST7FL35F2M3 trades automotive temperature grade and 5 V tolerance for lower supply voltage compliance, while STM8AF5269 delivers architectural evolution with CAN, larger memory, and higher clock speed - making it suitable for scalable platform development beyond legacy ST7 constraints.
Availability
ST7FL35F2MAE is available at Aetrix Electronics and suitable for automotive body electronics, LIN network nodes, and engine bay sensor interfaces requiring stable component supply across extended temperature and voltage ranges.
Supply support for ST7FL35F2MAE 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 ST7L3x family was engineered specifically for cost-sensitive, functionally safe automotive applications requiring LIN connectivity, EEPROM persistence, and robust operation from -40°C to 125°C - targeting body control, lighting, and distributed sensor nodes.
FAQ
Is ST7FL35F2MAE still in active production?
No - ST7FL35F2MAE is marked as Obsolete in ST's official documentation (Doc ID 11928 Rev 8). STMicroelectronics discontinued the ST7L3x series in favor of the STM8AF automotive portfolio. Aetrix Electronics maintains limited legacy stock and supports last-time-buy programs with full traceability and extended warranty for qualifying industrial and automotive customers.
Does ST7FL35F2MAE require an external LIN transceiver?
No - the integrated LINSCI™ peripheral handles protocol framing, checksum calculation, and sync field detection, but an external LIN physical layer transceiver (e.g., TLE6250, MC33661) is required to drive the LIN bus line. The MCU's PA1/PA2 pins connect directly to the transceiver's TXD/RXD pins per ST's hardware design guidelines.
What debug interface does ST7FL35F2MAE support?
ST7FL35F2MAE supports ST's proprietary ICC (In-Circuit Communication) interface via dedicated pins (ICCLK, ICDAT) for programming and debugging. It is compatible with ST's STVP software and ST-LINK-compatible debug modules, but not with JTAG or SWD. Full debug functionality requires the ST7 Debug Module (DM) referenced in the datasheet.
Can the internal RC oscillator meet LIN baud rate accuracy requirements?
Yes - the factory-trimmed internal RC oscillator achieves ±1% accuracy over temperature and voltage, meeting LIN specification requirements for slave nodes (±1.5%) and supporting master-mode operation with optional PLL stabilization. For highest precision master timing, ST recommends using the external crystal option with OSCIN/OSCOUT pins.
ST7FL35F2MAE 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:
ST7FL35F2MAE FAQ
1.How can I place an order for ST7FL35F2MAE through Aetrix?
Please submit a Request for Quotation (RFQ) for ST7FL35F2MAE 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 ST7FL35F2MAE reliable?
The price and inventory of ST7FL35F2MAE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST7FL35F2MAE is usually 5 days.
3.What payment methods are accepted for ST7FL35F2MAE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST7FL35F2MAE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST7FL35F2MAE?
ST7FL35F2MAE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST7FL35F2MAE 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 ST7FL35F2MAE?
For technical support, including ST7FL35F2MAE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST7FL35F2MAE requirements.
6.How does Aetrix verify that ST7FL35F2MAE is sourced from the original manufacturer or authorized distributors?
All ST7FL35F2MAE 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 ST7FL35F2MAE meets industry standards.
7.What is the process for return or replacement of ST7FL35F2MAE?
All ST7FL35F2MAE units undergo pre-shipment inspection (PSI). If there is an issue with ST7FL35F2MAE, 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 ST7FL35F2MAE part is unused and in its original packaging.
Return procedure for ST7FL35F2MAE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ST7FL35F2MAE Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
