CMT83085

CMT83085/CMT83087 are high-reliability half-duplex RS-485 transceivers based on digital isolation technology. The devices are UL1577 safety certified, supporting 5kVrms isolation voltage withstand, while featuring low emissions, low power consumption, and strong EMI immunity. The bus-side pins provide ±12kV system-level ESD protection to ground. The devices incorporate failsafe protection, ensuring a logic-high output at the receiver when the receiver input is open or shorted. The receiver input impedance is 1/8 unit load, allowing up to 256 transceivers to be connected on the bus. The data rate of 12Mbps helps reduce EMI on the transmission line. The devices are available in a wide-body SOIC-16 package.

Applications

• Industrial automation systems
• Isolated RS-485 communication systems
• Smart electricity and water meters

Key features

• Safety certifications: VDE certified per DIN VDE V 0884-11:2017-01, UL1577 certified for 1-minute 5000Vrms isolation, CSA certified component per 5A standard, CQC certified per GB4943.1-2011
• Up to 5000Vrms isolation voltage
• Bus-side supply voltage range: 3.0V to 5.5V
• VDD1 supply voltage range: 2.5V to 5.5V
• High common-mode transient immunity: ±200 kV/μs
• High system-level EMC performance: bus pins compliant with IEC61000-4-2 ±12 kV ESD
• Operating temperature range: -40°C to 125°C
• Fail-safe receiver
• Isolation barrier lifetime exceeding 40 years
• Supports up to 256 transceivers on the bus
• RoHS-compliant wide-body SOIC-16 package