ATSAMD20E18A-AN
Microchip Technology
ATSAMD20E18A-AN
Microchip Technology
IC MCU 32BIT 256KB FLASH 32TQFP
Reference Price (USD)
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$3.59000
500+
$3.5541
1000+
$3.5182
1500+
$3.4823
2000+
$3.4464
2500+
$3.4105
Exquisite packaging
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ATSAMD20E18A-AN
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Product details
The ATSAMD20E18A-AN by Microchip Technology 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 ARM® Cortex®-M0+ technology with lockstep cores, this microcontroller detects processing errors within 50ns to meet CENELEC EN 50128 safety requirements.The 32-Bit Single-Core architecture incorporates quadruple modular redundancy for all safety-critical calculations in railway interlocking systems.Operating at 48MHz, the device processes track occupancy data with deterministic latency below 100 s, crucial for moving block signaling systems.With I²C, SPI, UART/USART support, the microcontroller implements PROFIsafe and other railway-specific protocols with hardware-based CRC checking.Integrated Brown-out Detect/Reset, POR, WDT include vital relay drivers with continuous self-testing capabilities required for railway signaling equipment.26 fail-safe digital inputs incorporate galvanic isolation and continuous contact monitoring for track circuit interfaces.256KB (256K 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.32K x 8 of ECC-protected memory maintains data integrity even during severe electromagnetic disturbances in traction power environments.The 1.62V ~ 3.6V range withstands 100V transients common in railway power distribution systems with 24V nominal supply.Safety-certified A/D 10x12b; D/A 1x10b 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 ~ 105°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 32-TQFP provides 8kV surge protection on all lines exposed to overhead catenary induction and lightning strikes.Available in 32-TQFP (7x7), the microcontroller includes complete safety documentation for railway certification processes.
Product Attributes
- Product Status: Active
- Core Processor: ARM® Cortex®-M0+
- Core Size: 32-Bit Single-Core
- Speed: 48MHz
- Connectivity: I²C, SPI, UART/USART
- Peripherals: Brown-out Detect/Reset, POR, WDT
- Number of I/O: 26
- Program Memory Size: 256KB (256K x 8)
- Program Memory Type: FLASH
- EEPROM Size: -
- RAM Size: 32K x 8
- Voltage - Supply (Vcc/Vdd): 1.62V ~ 3.6V
- Data Converters: A/D 10x12b; D/A 1x10b
- Oscillator Type: Internal
- Operating Temperature: -40°C ~ 105°C (TA)
- Mounting Type: Surface Mount
- Package / Case: 32-TQFP
- Supplier Device Package: 32-TQFP (7x7)
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