SP332

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. The device also includes a loop back function which internally connects driver outputs to receiver inputs for a chip self test. An Exar-patended charge pump allows +5V-only operation. TYPICAL APPLICATIONS CIRCUIT 0.1µF 0.1µF 0V 0V TTL/CMOS TTL/CMOS TTL/CMOS TTL/CMOS RS-232 Mode +5V 9 C1+ 5 VCC SP...