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SP3243EUEA-L Datasheet(PDF) 6 Page - Exar Corporation |
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SP3243EUEA-L Datasheet(HTML) 6 Page - Exar Corporation |
6 / 25 page 6 Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP3243E_102_060611 Table 1. Device Pin Description PIN NUMBER NAME FUNCTION SP3243E SP3243EUCR QFN C1+ Positive terminal of the voltage doubler charge-pump capacitor 28 28 V+ Regulated +5.5V output generated by the charge pump 27 26 C1- Negative terminal of the voltage doubler charge-pump capacitor 24 22 C2+ Positive terminal of the inverting charge-pump capacitor 1 29 C2- Negative terminal of the inverting charge-pump capacitor 2 31 V- Regulated -5.5V output generated by the charge pump 3 32 R 1IN RS-232 receiver input. 4 2 R 2IN RS-232 receiver input 5 3 R 3IN RS-232 receiver input 6 4 R 4IN RS-232 receiver input 7 5 R 5IN RS-232 receiver input 8 6 R 1OUT TTL/CMOS receiver output 19 17 R 2OUT TTL/CMOS receiver output 18 16 R 2OUT Non-inverting receiver-2 output, active in shutdown 20 18 R 3OUT TTL/CMOS receiver output 17 15 R 4OUT TTL/CMOS receiver output 16 14 R 5OUT TTL/CMOS receiver output 15 13 STATUS TTL/CMOS Output indicating online and shutdown status 21 19 T 1IN TTL/CMOS driver input 14 12 T 2IN TTL/CMOS driver input 13 11 T 3IN TTL/CMOS driver input 12 10 ONLINE Apply logic HIGH to override AUTO ON-LINE® circuitry keeping drivers acive (SHUTDOWN must also be logic HIGH, refer to Table 2) 23 21 T1 OUT RS-232 driver output 9 7 T2 OUT RS-232 driver output 10 8 T3 OUT RS-232 driver output 11 9 GND Ground 25 23 V CC +3.0V to +5.5V supply voltage 26 25 SHUTDOWN Apply logic LOW to SHUTDOWN driver and charge pump. This overrides all AUTO ON-LINE® circuitry and ONLINE (Refer to table 2) 22 20 NC No Connection - 1,24,27,30 |
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