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Questions tagged [max3232]

3V to 5.5V multichannel RS-232 line driver/receiver

1
vote
0answers
115 views

What differences between MAX3232 and MAX3232E?

I'm wondering if just ESD protection or something differs in MAX3232E vs MAX3232. Did I miss something? I know for C as consumer and I as industrial that differ in operating temperature intervals.
0
votes
0answers
311 views

correct use of MAX3232 for a single TTL to RS232 connection

I am using the MAX3232 chip for doing TTL to RS232 conversion. Datasheet available here: http://www.ti.com/lit/ds/symlink/max3232.pdf The chip is dual channel, but I only need to use one channel. I ...
3
votes
0answers
333 views

RS232 using a MAX3232 chip problems [closed]

I am trying to use RS232 to TTL convertor much like this: https://www.amazon.com/MAX3232-Female-Serial-Converter-Module/dp/B00BXX2OU2 I am not sure if the chip is authentic MAXIM or some knock off. ...
0
votes
1answer
327 views

MAX3232 CAE outputs -6V / +6V instead of -12V / +12V

I bought a GN801 GPS module from Stoton ( http://www.stotoncn.com/gnssmodule/showproduct.php?lang=en&id=42 ) Power supply range is +5V. There is an onboard MAX3232CAE that is supposed to output ...
1
vote
1answer
263 views

Questions about an atmega32 serial-bus to RS232 with converter and different logic levels

I have an atmega32 and a FUM DCF-U atomic clock (signal receiver and decoder) of HKW-elektronik. The µ-controller works with 5V and the module on 3.3V. I have to build a converter, because the µ-...
4
votes
5answers
8k views

MAX3232 overheating/burnt after connecting to PC

I've got a MAX3232 Serial-to-TTL RS232 board which I am currently using in factory assembly lines. I don't have its picture, but here's a similar product: This is the circuit I've managed to figure ...
0
votes
2answers
2k views

Connect Arduino to RS232

I have a device that is powered by the Arduino (+5V). The device (a VC0706 Powered camera), incomporates a MAX3232 to convert to RS-232. Unfortunatly, I don't have the tools or dexterity to remove ...
4
votes
1answer
2k views

UART is garbled when running at more than 9600 bps

I'm connecting 2 MSP430F5529-based boards (running at 1 MHz) using UART and MAX3232 (MSP430F5529 -> MAX3232 -> cable, a few cm long - will be longer in our final application -> MAX3232 -> MSP430F5529)....
3
votes
2answers
9k views

Atmega 328 uart program: compiler error on undeclared variable on register name ending with “n”

I'm trying to get the atmega328 to communicate over serial port with my pc. I'm using hyperterminal to echo back the keyboard character entries. I'm using the max3232 chip to do the communicated with ...
6
votes
1answer
3k views

Crosstalk from RX to TX line on the RS-232 side of MAX3232C

We have a product which is using a MAX3232C for interfacing to a PC. Its RS-232 RX line is tied to the MAX3232's R1IN pin and its TX line to T1OUT: The problem we are having appears to be some kind ...
3
votes
1answer
356 views

RS-232 Zero (-7V) drops when I connect db9 connectors

I'm interfacing with a system using RS-232. To communicate, I use MAX2322 for TTL <-> RS-232 to interface with PIC microcontroller and PL2303 for USB <-> RS-232 to interface with PC. All of the ...
2
votes
1answer
347 views

Generating dual rail power from a MAX3232?

I've seen several electronics devices using MAX3232 or similar devices to generate dual rail power supplies. In my instance, I have 3.3V going in and need regulated ±5V outputs. I have three four ...