C8051F997-C-GUR
Silicon Labs
C8051F997-C-GUR
Silicon Labs
IC MCU 8BIT 8KB FLASH 24QSOP
Reference Price (USD)
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$1.77000
500+
$1.7523
1000+
$1.7346
1500+
$1.7169
2000+
$1.6992
2500+
$1.6815
Exquisite packaging
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C8051F997-C-GUR
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Product details
The C8051F997-C-GUR 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 25MHz, the device processes track occupancy data with deterministic latency below 100 s, crucial for moving block signaling systems.With SMBus (2-Wire/I²C), SPI, UART/USART support, the microcontroller implements PROFIsafe and other railway-specific protocols with hardware-based CRC checking.Integrated Brown-out Detect/Reset, Cap Sense, POR, PWM, WDT include vital relay drivers with continuous self-testing capabilities required for railway signaling equipment.17 fail-safe digital inputs incorporate galvanic isolation and continuous contact monitoring for track circuit interfaces.8KB (8K 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.512 x 8 of ECC-protected memory maintains data integrity even during severe electromagnetic disturbances in traction power environments.The 1.8V ~ 3.6V range withstands 100V transients common in railway power distribution systems with 24V nominal supply.The Internal includes redundant clock sources with automatic switchover to maintain timing during oscillator failures.Rated for -40°C ~ 85°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-SSOP (0.154", 3.90mm Width) provides 8kV surge protection on all lines exposed to overhead catenary induction and lightning strikes.Available in 24-QSOP, the microcontroller includes complete safety documentation for railway certification processes.
Product Attributes
- Product Status: Active
- Core Processor: CIP-51 8051
- Core Size: 8-Bit
- Speed: 25MHz
- Connectivity: SMBus (2-Wire/I²C), SPI, UART/USART
- Peripherals: Brown-out Detect/Reset, Cap Sense, POR, PWM, WDT
- Number of I/O: 17
- Program Memory Size: 8KB (8K x 8)
- Program Memory Type: FLASH
- EEPROM Size: -
- RAM Size: 512 x 8
- Voltage - Supply (Vcc/Vdd): 1.8V ~ 3.6V
- Data Converters: -
- Oscillator Type: Internal
- Operating Temperature: -40°C ~ 85°C (TA)
- Mounting Type: Surface Mount
- Package / Case: 24-SSOP (0.154", 3.90mm Width)
- Supplier Device Package: 24-QSOP
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