Transceivers deliver industry’s widest common mode range claims Intersil
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Intersil has launched a series of transceivers that it claims deliver the industry's widest common mode range. According to semiconductor giant, the ISL3247xE, ISL3248xE, and ISL3249xE series of fault protected RS-485/RS-422 transceivers combine overvoltage protection (ovp), high electrostatic discharge (esd) tolerance and wide common mode range.
The devices also feature low quiescent supply current and have been designed for harsh operating environment applications such as security/surveillance cameras, industrial process control and factory automation networks.
Driver outputs and receiver inputs are fault protected against voltages as high as ±60V and are protected against esd events up to ±16.5kV. The devices have a quiescent supply current of 2.3mA, which Intersil claims is 30 to 50% lower than most competitive devices.
The ISL3249xE and ISL3248xE series combine both ±60V ovp and ±25V cmr, while the ISL3247xE is rated at ±60V ovp and ±15V cmr. Options include slew rate limited versions, high data rate versions and both half duplex and full duplex configurations.
The need for bus biasing resistors has been removed due to the inclusion of fail safe receiver inputs which enable a logic high receiver output if the inputs are shorted, floating or on an idle bus. To address the problem of swapping cable data wires during installation, the ISL3248xE series includes a polarity reversal feature that can remotely correct for this error without requiring rewiring of the cable or the connector.
