EFM8BB31F32A-B-4QFN24R
Silicon Labs
EFM8BB31F32A-B-4QFN24R
Silicon Labs
IC MCU 8BIT 32KB FLASH 24QFN
Reference Price (USD)
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$1.35148
500+
$1.3379652
1000+
$1.3244504
1500+
$1.3109356
2000+
$1.2974208
2500+
$1.283906
Exquisite packaging
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EFM8BB31F32A-B-4QFN24R
$1.35
Product details
The EFM8BB31F32A-B-4QFN24R by Silicon Labs pioneers ultra-reliable Embedded - Microcontrollers for railway signaling systems. Its fail-safe architecture and SIL4 certification make it the preferred choice for vital train control applications.Featuring CIP-51 8051 technology with lockstep cores, this microcontroller detects processing errors within 50ns to meet CENELEC EN 50128 safety requirements.The 8-Bit architecture incorporates quadruple modular redundancy for all safety-critical calculations in railway interlocking systems.Operating at 50MHz, the device processes track occupancy data with deterministic latency below 100 s, crucial for moving block signaling systems.With I²C, SMBus, SPI, UART/USART support, the microcontroller implements PROFIsafe and other railway-specific protocols with hardware-based CRC checking.Integrated Brown-out Detect/Reset, POR, PWM, WDT include vital relay drivers with continuous self-testing capabilities required for railway signaling equipment.20 fail-safe digital inputs incorporate galvanic isolation and continuous contact monitoring for track circuit interfaces.32KB (32K x 8) accommodates SIL4-certified application code with complete diversity between primary and secondary safety channels.The FLASH implementation includes periodic memory scrubbing that detects and corrects radiation-induced soft errors.2.25K x 8 of ECC-protected memory maintains data integrity even during severe electromagnetic disturbances in traction power environments.The 2.2V ~ 3.6V range withstands 100V transients common in railway power distribution systems with 24V nominal supply.Safety-certified A/D 12x10/12b SAR; D/A 2x12b perform continuous self-calibration to maintain 0.1% accuracy in axle counter sensor interfaces.The Internal includes redundant clock sources with automatic switchover to maintain timing during oscillator failures.Rated for -40°C ~ 125°C (TA), the device operates reliably in trackside enclosures without climate control.Surface Mount packaging withstands 5g vibration and 50g shock loads specified in EN 61373 for rolling stock equipment.The 24-WFQFN Exposed Pad provides 8kV surge protection on all lines exposed to overhead catenary induction and lightning strikes.Available in 24-QFN (4x4), the microcontroller includes complete safety documentation for railway certification processes.
Product Attributes
- Product Status: Not For New Designs
- Core Processor: CIP-51 8051
- Core Size: 8-Bit
- Speed: 50MHz
- Connectivity: I²C, SMBus, SPI, UART/USART
- Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O: 20
- Program Memory Size: 32KB (32K x 8)
- Program Memory Type: FLASH
- EEPROM Size: -
- RAM Size: 2.25K x 8
- Voltage - Supply (Vcc/Vdd): 2.2V ~ 3.6V
- Data Converters: A/D 12x10/12b SAR; D/A 2x12b
- Oscillator Type: Internal
- Operating Temperature: -40°C ~ 125°C (TA)
- Mounting Type: Surface Mount
- Package / Case: 24-WFQFN Exposed Pad
- Supplier Device Package: 24-QFN (4x4)
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