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MAX3232-EP: Request a schematic review

MJ Jeon
Genius 5240 points
Part Number: MAX3232-EP
Other Parts Discussed in Thread: STRIKE, MAX3232

Hi, TI Support Team

A request for schematic review has been received from a customer.

I request a review of the circuit diagram below.

Thanks.

Regards,

MJ

  • 0
    TI__Mastermind 32633 points

    Hi MJ,

    The capacitors are correctly wired and are of correct value to adjust the charge pump circuitry. 

    ROUT2 does not need a 4.7kohm pullup resistor since driving architecture on that pin is push-pull configuration. 

    The 33ohm series resistance may be a good call in terms of fault protection such as a short-circuit fault or in protecting against an ESD strike, but since ROUT2 abs max is -0.3V to VCC + 0.3V you may consider taking out the series resistance. Also keep in mind that the series resistance on ROUT2 creates a low-pass filter with parasitic capacitance to ground, attenuating your data signal to the MCU. I don't know the length of cable between the MAX3232 to MCU, but this could mess with signal integrity. 

    Other than these suggestions, I think the over schematic looks good.

    Regards,

    -Tyler