The Siemens 6ES7195-0BD31-0XA0 is the SPC3 ASIC for PROFIBUS DP slave applications, handling the complete protocol stack on-chip. Bus access is integrated into the ASIC, so it offloads the host microcontroller from real-time DP communication.
With a 12 Mbit/s maximum transmission rate and automatic baud rate detection, the ASIC can negotiate the bus speed without firmware intervention, simplifying slave integration on mixed-speed segments. The 1.5 kbyte telegram memory bounds the cyclic data payload per slave; firmware load sits between 4 and 24 KB. Power draw is 0.5 W at 5 V DC, which keeps thermal contribution negligible in a densely populated control cabinet. The 44-pin PQFP housing (2 cm² footprint) suits standard reflow assembly. Rated for -40 to 85 °C ambient, so it handles cold startups and heat near drives or transformers without derating.