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ST3243EBJ Scheda tecnica(PDF) 3 Page - STMicroelectronics |
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ST3243EBJ Scheda tecnica(HTML) 3 Page - STMicroelectronics |
3 / 18 page ST3243E 3/18 PIN DESCRIPTION PlN N° SYMBOL NAME AND FUNCTION A1 R2IN Second Receiver Input Voltage A2 R3IN Third Receiver Input Voltage A3 R4IN Fourth Receiver Input Voltage A4 R5IN Fifth Receiver Input Voltage A5 T1OUT First Transmitter Output Voltage A6 T2OUT Second Transmitter Output Voltage B1 V- -5.5V Generated by the Charge Pump B2 R1IN First Receiver Input Voltage B3 T3OUT Third Transmitter Output Voltage B4 T3IN Third Transmitter Input Voltage B5 T1IN First Transmitter Input Voltage B6 T2IN Second Transmitter Input Voltage C1 C2+ Positive Terminal of Inverting Charge Pump Capacitor C2 C2- Negative Terminal of Inverting Charge Pump Capacitor C5 R4OUT Fourth Receiver Output Voltage C6 R5OUT Fifth Receiver Output Voltage D1 C1+ Positive Terminal of Voltage- Charge Pump Capacitor D2 V+ 5.5V Generated by the Charge Pump D3 VCC Supply Voltage D4 FORCEON Drive high to override automatic circuitry keeping transmitters on (FORCEOFF must be high) D5 R1OUT First Receiver Output Voltage D6 R3OUT Third Receiver Output Voltage E1 GND Ground E2 C1- Negative Terminal of Voltage- Charge Pump Capacitor E3 FORCEOFF Drive low to shut down transmitters and on-board power supply. This over-rides all automatic circuitry and FORCEON E4 INVALID Output of the valid signal detector. Indicates if a valid RS-232 level is present on receiver inputs logic "1" E5 R2OUTB Non-inverting Complementary Receiver Output, always active for wake-up E6 R2OUT Second Receiver Output Voltage |
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