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Product Detailed Parameters
- Description：IC MCU 8BIT 8KB FLASH 32QFN
- Series：C8051F54x
- Mfr：Silicon Labs
- Package：Tube
- Core Processor：8051
- Core Size：8-Bit
- Speed：50MHz
- Connectivity：SMBus (2-Wire/I2C), SPI, UART/USART
- Peripherals：POR, PWM, Temp Sensor, WDT
- Number of I/O：25
- Program Memory Size：8KB (8K x 8)
- Program Memory Type：FLASH
- EEPROM Size：-
- RAM Size：1.25K x 8
- Voltage - Supply (Vcc/Vdd)：1.8V ~ 5.25V
- Data Converters：A/D 25x12b
- Oscillator Type：Internal
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Supplier Device Package：32-QFN (5x5)
- Package / Case：32-VFQFN Exposed Pad
- Grade：-
- Qualification：-
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Overview
The C8051F545-IM is an automotive-grade, mixed-signal ISP Flash MCU from Silicon Labs. It features a high-speed 8051 core operating at up to 50 MHz with 70% of instructions executing in one or two system clocks. The device includes 16 kB of Flash memory and 1280 bytes of internal data RAM (256 + 1024 XRAM). Key analog peripherals consist of a 12-bit ADC supporting up to 200 ksps and two comparators. Digital interfaces include a LIN 2.1 controller, hardware UART, SMBus, and SPI. It operates on a supply voltage of 1.8 V to 5.25 V and is housed in a QFN-32 package.
Feature Summary
- Automotive qualification compliant with AEC-Q100 standards for extended temperature operation.
- Integrated LIN 2.1 controller capable of master and slave modes without requiring an external crystal.
- On-chip debug circuitry enables full-speed, non-intrusive in-system debugging without additional emulators.
- High-speed 8051 core architecture executes the majority of instructions in minimal system clock cycles.
Applications
- Motor control systems
- Sensor interface circuits
- Parking assistance modules
- Seat position and adjustment controllers
Procurement Notes
Verify component authenticity through authorized channels due to the End-of-Life status. Confirm that the specific revision matches design requirements as the part is no longer recommended for new designs. Ensure compatibility with existing firmware and hardware layouts before finalizing procurement decisions.
Selection Notes
Select this component only for maintenance or replacement of existing C8051F54x designs. Evaluate alternative automotive-grade MCUs for new projects given the discontinuation notice. Consider pinout compatibility and peripheral availability when migrating legacy applications to newer silicon generations.
Part Context
This microcontroller belongs to the C8051F54x family of mixed-signal ISPs. It shares architectural similarities with other members like the C8051F540/1/4 but differs in specific memory configurations and package options. The series is designed for robust industrial and automotive environments requiring reliable flash programming and extensive I/O capabilities.
Replacement Considerations
Silicon Labs recommends the EFM8BB52F16I-QFN20 as a potential successor. Verify functional equivalence regarding pinouts, memory size, and peripheral sets before substitution.
FAQ
Is the C8051F545-IM suitable for automotive applications?
Yes, it is qualified to AEC-Q100 standards and supports an extended temperature range of -40°C to +125°C.
Does the device require an external crystal for LIN communication?
No, the integrated LIN 2.1 controller can operate without an external crystal by utilizing the internal oscillator.
