SP337EBEY-L Datasheet, PDF (15/18 Pages) Exar Corporation – 3.3V TO 5V RS-232/RS-485/RS-422 MULTIPROTOCOL TRANSCEIVER

SP337E
REV. 1.0.2
3.3V TO 5V RS-232/RS-485/RS-422 MULTIPROTOCOL TRANSCEIVER
SP337E Mode Configuration tables
TABLE 1: SP337EB
RS232/RS485 TXEN RXEN
Operation
Charge Pump Driver and Receiver
Low
Ignored Low
RS-232
3T/5R
ON
Receivers Enabled
Low
Ignored High
RS-232
3T/5R
ON
Receivers Disabled
(High-Z Output)
High
Low
Low RS-485/422 2T/2R
ON
Full-Duplex
Drivers Disabled
(High-Z Output);
Receivers Enabled
High
High
High RS-485/422 2T/2R
ON
Full-Duplex
Drivers Enabled;
Receivers Disabled
(High-Z Output)
High
Low
High RS-485/422 2T/2R
ON
Full-Duplex
Drivers Disabled
(High Z output);
Receivers Disabled
(High Z output)
High
High
Low RS-485/422 2T/2R
ON
Full-Duplex
Drivers Enabled;
Receivers Enabled
RS232/RS485 TXEN
Low
Ignored
Low
Ignored
RXEN
Low
High
TABLE 2: SP337EU
Operation
Charge Pump
RS-232
3T/5R
ON
RS-232
3T/5R
ON
High
Low
Low RS-485/422 2T/2R
ON
Full-Duplex
High
High
High RS-485/422 2T/2R
ON
Full-Duplex
High
Low
High RS-485/422 2T/2R
OFF
Full-Duplex
(Shutdown)
High
High
Low RS-485/422 2T/2R
ON
Full-Duplex
Driver and Receiver
Receivers Enabled
Receivers Disabled
(High-Z Output)
Drivers Disabled
(High-Z Output);
Receivers Enabled
Drivers Enabled;
Receivers Disabled
(High-Z Output)
Drivers Disabled
(High Z output);
Receivers Disabled
(High Z output)
Drivers Enabled;
Receivers Enabled
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