ericgibbs said:
If I read it correctly the datasheet says the MAX will operate from a supply of +3.5v thru +5v and the internal voltage pumps will generate about +/5.5V to suit RS232.
appended here are the main electrical characteristics
VCC...........................................................................-0.3V to +6V
V+ (Note 1) ...............................................................-0.3V to +7V
V- (Note 1) ................................................................+0.3V to -7V
V+ + V- (Note 1)...................................................................+13V
Input Voltages
T_IN, SHDN, EN ...................................................-0.3V to +6V
MBAUD...................................................-0.3V to (VCC + 0.3V)
R_IN .................................................................................±25V
Output Voltages
T_OUT...........................................................................±13.2V
R_OUT....................................................-0.3V to (VCC + 0.3V)
Short-Circuit Duration
T_OUT ....................................................................Continuous
There appears a controversy.
(v+ + v-) diff between v- to v= pins can't excced 13V even though individually thay can reach 7V
if so, how to interpret the output voltages T_ out and R_ out as +/- 13V