CA-IF4905M
Active
RS-485 Transceiver
The CA-IF4905 is the high-performance half-duplex RS-485 transceiver which could be used in harsh industrial and home-appliance environments. The bus pins could withstand high-level ESD events to protect internal circuit without damage.
This device has ±65V fault protection on bus pins, and the common-mode range (CMR) could be extended to ±40V when VCC ranges from 4.5V to 5.5V, which is suitable for long-cable communication applications. Each device contains one driver and one receiver, supporting the power supply range from 3V to 5.5V.
The CA-IF4905 features slew-rate-limited driver for low EMI and date rates up to 2Mbps. This device integrates failsafe circuit to guarantee a logical high on the receiver output when the bus inputs are open, short or on idle state. This device features a 1/8 unit load input impedance, allowing up to 256 transceivers on a bus.
The CA-IF4905 devices are packaged in narrow body, 8-pin SOIC or small MSOP8 packages and specified over ambient free-air temperature range of –40°C to 125°C.
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Features
Meets or Exceeds the Requirements of the TIA/EIA485A Standard
Data Rate
CA-IF4905S: Low EMI 500kbps
CA-IF4905M: Low EMI 2Mbps3V to 5.5V Supply Voltage
Driver with Current Limiter and Thermal Shutdown Protection
Bus Pins ESD Protection
±30kV HBM ESD
±6kV IEC 61000-4-2 Contact Discharge1/8 Unit Load (Up to 256 Bus Nodes)
Open, Short and Idle Bus Failsafe Protection
Hot Plug-in Protection
Extended Industrial Temperature Range: –40°C to 125°C
±65V Fault Protection on Bus Pins
±40V Common Mode Range on Bus Pins
Low Standby Current: <30µA
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Applications
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HVAC
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Home and Building Automation
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Motion Controllers
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Industrial Automation
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Elevator Control
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Video Surveillance
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Power Grid Infrastructure
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Technical Documentation
Category
Title
Last Updated
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Title: Datasheet
Last Updated: Nov 18,2025
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