5pcs MAX485 Chip Module TTL to RS-485 Instrument Interface Module MAX485 chip is a low power consumption for RS-485 communication, limit the slew rate transceiver. Then 5.08 (mm) pitch 2P terminal, convenient RS-485 communication wiring. Chip leads all pins can be controlled through the microcontroller. Operating voltage: 5V. Size: 44 (mm) x14 (mm).