TRS3232E-Q1: Cap Voltages

Darrell Snader

Part Number: TRS3232E-Q1
Other Parts Discussed in Thread: TRS3232

I am doing a de-rating analysis on the TRS3232 RS232 line driver/receiver. What is the max voltage the caps see on V+(pin 2), V- (pin 6) and from pins 1 to 3 and 4 to 5?

over 4 years ago

0 Hao L over 4 years ago

TI__Mastermind 25705 points

Darrell,

The max voltage from pin 1 to 3 and 4 to 5 is one Vcc. The pin 2 and pin 6 voltage could reach 2x Vcc in theory however the regulator in the IC controls it to be less than the abs max (7V for V+ and -7V for V-). You may want to refer to this app note about how the charge pump works.

e2e.ti.com/.../how-the-rs-232-transceiver-s-regulated-charge-pump-circuitry-works

Please let me know if you have more questions.

Regards,

Hao

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TRS3232E-Q1: Cap Voltages