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SP332
RS-232/RS-485 Multi-mode SerialTransceiver
• +5V Only Single Supply Operation • Software Programmable RS-232 or RS-485
Selection • 4 Drivers, 4 Receivers RS-232 • 2 Drivers, 2 Receivers RS-485 • Loop back function for Self Test • 28-pin WSOIC package
TI4 SEL_B
TX4 TX3 VCC TX1 TX2 GND C1+
V+ C2+ C1– C2–
V–
1 2 3 4 5 6 7 8 9 10 11 12 13 14
SP332
28 TI3 27 TI2 26 TI1 25 SD 24 SEL_A 23 LB 22 RX4 21 RX3 20 RX2 19 RX1 18 RI4 17 RI3 16 RI2 15 RI1
DESCRIPTION The SP332 is a monolithic device that contains both RS-232 and RS-485 line drivers and receivers. The configuration of the SP332 can be changed at any time by changing the logic state of two control pins.