• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 32 subscribers
  • Views 144 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

MAX3221: May I have some confirming item for MAX3221CPWR application ?

TAlex Wu
Expert 1140 points
Part Number: MAX3221
Other Parts Discussed in Thread: MAX3243E,

Dear SIR:

Good day!! 

May I have some question regarding MAX3221CPWR as below question ?

(1)MAX3221CPWR  pin3 (V+)  how to connect ? (for example 1 and 2 ,which one is correct ? or ,....)

    (for example 1: MAX3221CPWR  pin3 (V+) through a 0.1uf  cap. connect to  +3.3V )

     (for example 2: MAX3221CPWR  pin3 (V+) through a 0.1uf  cap. connect to  GND )

(2) as above for example 1 and 2 ,Have any different for application or consider,if both are correct ?)  

(3)"MAX3221CPWR can replace  MAX3243ECDBR" and " MAX3243ECDBR can replace MAX3221CPWR" ?

     (change another word:"Original circuit use MAX3221CPWR can directly change to MAX3243ECDBR    ,drop in capable  ?"

                                   and "Original circuit use MAX3243ECDBRR can directly change to MAX3221CPWR    ,drop in capable  ?" )

(4)Have any application different between MAX3243ECDBR  and MAX3243ECDBR ?

    (change another word: what's condition necessary use MAX3243ECDBR and   what's condition necessary use  MAX3243ECDBR ? )

 Thanks     

  • 0
    TI__Mastermind 25705 points

    Hi,

    1) V+ pin cap can be connected to GND or Vcc. If you're interested in the detail, please refer to this blog.

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

    2) Either way is correct.

    3) I'm not sure how the change could happen either way. MAX3243E is a 28 pin device with 3TX/5RX, which MAX3221 is 16 pin with 1TX/1RX.

    4) I assume you asked the difference between MAX3243E and MAX3221. They're both RS-232 transceivers. Which device to choose depends on the application, like channel number, data rate, ESD level, etc.

    Regards,

    Hao