RS-485 独立接口
下载次数：405发布日期：2011-05-14
The SP1481E/SP1485E and SP1490E/1491E series transceivers with SP6652 high efficiency high
frequency current mode PWM buck regulator together allow creating an isolated RS-485 interface with up
to 2kVrms isolation and can support up to 15Mbps data rate communication.
FEATURES
• +5V Single Supply Operation
• ESD Protection for Bus-pins (±15kV
Air-Gap Discharge and Human Body
Model and ±8kV Contact Discharge)
• True Failsafe Receiver
APPLICATION
• Low Power RS485/RS-422 Systems
• DTE-DCE Interface
• Local Area Networks
• Industrial Process Control
• Building Automation
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation of the device at these ratings or any other above
those indicated in the operation sections of the specifications below is not implied. Exposure to absolute
maximum rating conditions for extended periods of time may affect reliability.
Supply Voltage (Vcc) …... + 6.0V
Input voltage at control input pins (RE , DE) …. - 0.3V to + 6V
Driver input voltage (DI) …...- 0.3V to + 6V
Driver output voltage (A, B, Y, and Z) ……………-7.5V to +12.5V
Receiver input voltage (A, B) … …………………- 7.5V to +12.5V
All other parameters are limited by used components and should be checked at appropriate data sheets.
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