CMT83089C High-Reliability Isolated Half-Duplex RS-485 Transceiver
The CMT83089C is a high-reliability isolated half-duplex RS-485 transceiver engineered with CMOSTEK digital isolation technology, offering safety certifications across UL1577 (5kVrms for 1 minute), DIN VDE V 0884-11, CSA, and CQC. Designed for harsh industrial environments, it features extreme ±200kV/µs CMTI noise immunity, ±12kV IEC61000-4-2 contact ESD protection on the bus pins, true fail-safe receiver circuitry, and a 1/8-unit-load input impedance supporting up to 256 bus transceivers in a wide-body SOIC-16 footprint.
5000 Vrms (UL1577)
±200 kV/µs
500 Kbps (Slew-Limited)
±12 kV IEC Contact
VDD1: 2.5–5.5V | VDD2: 3–5.5V
-40°C to +125°C
| Product Model | CMT83089C |
| Transceiver Type | Isolated Half-Duplex RS-485 / RS-422 Transceiver |
| Safety Certifications | UL1577 (5000Vrms 1 min), DIN VDE V 0884-11: 2017-01, CSA Component Notice 5A, CQC (GB4943.1-2011) |
| Transient & Surge Immunity | CMTI: ±200 kV/µs | Surge Isolation Voltage (VIOSM): 8 kVpk | Projected Barrier Lifetime: >40 Years |
| ESD Protection Ratings | Bus Pins: ±12 kV IEC61000-4-2 Contact, ±8 kV HBM | Other Pins: ±7 kV IEC Contact, ±6 kV HBM | CDM: ±2 kV |
| Bus Load & Impedance | 1/8 unit-load (96 kΩ receiver input resistance), allowing up to 256 transceivers on a shared bus |
| Signal Integrity & Slew Control | Slew-rate limited output (500 Kbps max) to minimize EMI and line reflections; integrated true fail-safe receiver |
| Driver Propagation & Skew | Driver Propagation Delay (tPLH/tPHL): 11.5 ns – 13.2 ns Typ (50 ns Max) | Pulse Width Distortion: 1 ns Typ |
| Thermal Protection | Thermal-shutdown threshold: 145°C with 15°C hysteresis |
| Package & Body Size | Wide-Body 16-Pin SOIC (WB SOIC-16 / SOW16) | 10.4 x 7.5 mm |
| Target Applications | Industrial automation & control, isolated RS-485 communication loops, smart electric and water metering, security and monitoring systems |
Cellular Router USR-G808-EE 





Leave a Reply