RS-232/RS-485/RS-422 TRANSCEIVER
SP339E
RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION
DECEMBER 2013
REV. 1.0.4
GENERAL DESCRIPTION
The SP...
Description
SP339E
RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION
DECEMBER 2013
REV. 1.0.4
GENERAL DESCRIPTION
The SP339 is an advanced multiprotocol transceiver supporting RS-232, RS-485, and RS-422 serial standards in a 40 pin QFN package. Integrated cable termination and four configuration modes allow all three protocols to be used interchangeably over a single cable or connector with no additional switching components. Full operation requires only four external charge pump capacitors.
The RS-485/422 modes feature one driver and one receiver (1TX/1RX) in both half and full duplex configurations. The RS-232 mode (3TX/5RX) provides full support of all eight signals commonly used with the DB9 RS-232 connector. A dedicated diagnostic loopback mode is also provided.
The high speed drivers operate up to 20Mbps in RS485/422 modes, and up to 1Mbps in RS-232 mode. All drivers can be slew limited to 250kbps in any mode to minimize electromagnetic interference (EMI).
All transmitter outputs...
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