I'm having a doubt about the voltage rating of the capacitors of the RS3232 (a UART to RS232 transceiver).
For C3 and C4 (storing the +- voltage rails for the transceiver), the never exceed voltages are 7 and -7V, so 10V capacitors should be fine.
For C1 and C2, I'm not really sure what they do (I suspect they are used for the charge pumps), so I'm not sure about the voltage that will be on these pins, so I'm unsure about the voltage ratings.
Do you know what voltage rating I need for C1 and C2? (nb : supply voltage will be 4.5V)