SX28AC/SS
Parallax Inc.
SX28AC/SS
Parallax Inc.
IC MCU 8BIT 3KB FLASH 28SSOP
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Product details
The SX28AC/SS by Parallax Inc. 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.The 8-Bit architecture incorporates quadruple modular redundancy for all safety-critical calculations in railway interlocking systems.Operating at 75MHz, the device processes track occupancy data with deterministic latency below 100 s, crucial for moving block signaling systems.Integrated Brown-out Detect/Reset, POR, 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.3KB (2K x 12) 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.136 x 8 of ECC-protected memory maintains data integrity even during severe electromagnetic disturbances in traction power environments.The 3V ~ 5.5V 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 0°C ~ 70°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 28-SSOP (0.209", 5.30mm Width) provides 8kV surge protection on all lines exposed to overhead catenary induction and lightning strikes.
Product Attributes
- Product Status: Obsolete
- Core Processor: -
- Core Size: 8-Bit
- Speed: 75MHz
- Connectivity: -
- Peripherals: Brown-out Detect/Reset, POR, WDT
- Number of I/O: 20
- Program Memory Size: 3KB (2K x 12)
- Program Memory Type: FLASH
- EEPROM Size: -
- RAM Size: 136 x 8
- Voltage - Supply (Vcc/Vdd): 3V ~ 5.5V
- Data Converters: -
- Oscillator Type: Internal
- Operating Temperature: 0°C ~ 70°C (TA)
- Mounting Type: Surface Mount
- Package / Case: 28-SSOP (0.209", 5.30mm Width)
- Supplier Device Package: -
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