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SP335E Datasheet(PDF) 8 Page - Exar Corporation |
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SP335E Datasheet(HTML) 8 Page - Exar Corporation |
8 / 23 page SP335E 8 RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION REV. 1.0.2 PIN DESCRIPTIONS Pin Name RS-232 RS-485 Full Duplex RS-485 Half Duplex 1 2 GND Ground 3 T1OUT, B/Z Transmitter 1 Output Z Driver Neg Output B/Z Neg Input/Output 4 T2OUT, A/Y Transmitter 2 Output Y Driver Pos Output A/Y Pos Input/Output 5 6 R1OUT Receiver 1 Output X X 7 R2OUT, RO Receiver 2 Output Receiver TTL Output Receiver TTL Output 8 9 10 SHDN Low power shutdown mode when low 11 SLEW Data rate limited to 250kbps when low 12 FD_TX_TERM X 120 Y-Z termination enabled when both TERM and FD_TX_TERM are high X 13 TERM X 120 A-B termination enabled when high 14 RS-485/RS-232 0 1 1 15 HALF/FULL X 0 1 16 17 GND Ground 18 R2IN, A Receiver 2 Input A Pos Receiver Input X 19 R1IN, B Receiver 1 Input B Neg Receiver Input X 20 RE X Receiver enabled when low 21 T2IN, DE Transmitter 2 Input Driver enabled when high 22 T1IN, DI Transmitter 1 Input Driver TTL Input 23 24 25 V- Charge pump negative supply, 0.1µF from ground 26 C2- Charge pump cap 2 negative lead 27 C2+ Charge pump cap 2 positive lead, 0.1µF 28 V+ Charge pump positive supply, 0.1µF to ground 29 C1+ Charge pump cap 1 positive lead, 0.1µF 30 VL Logic Supply for TTL Inputs and Outputs, VL = +1.65V to +5.5V or tie to VCC 31 VCC Main Supply, VCC = +3.0V to +5.5V, bypass to ground with 1.0µF 32 C1- Charge pump cap 1 negative lead |
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