MAX202 RS232 to TTL Converter For Arduino
SKU:DFR0077
INTRODUCTION
This converter uses MAX202-based level shifter for converting TTL (Transistor-Transistor
Logic) -level serial to standard RS232serial.
RS232 is widely used in radio modifications,phone flash, XBOX360 flash, GPS, vehicle
detection, DVD flash, hard disk repair set-top box upgrade. It can be used to program STC
MCU, NXP MCU,Renesas MCU, STM32 MCU, N+-2EC MCU.
This converter can be connected to an Arduino Serial pin (0,1) to convert standard Arduino ttl to
RS232. It allows arduino talk to hundreds of RS232 devices.
RS232 DB9 Pinout Diagram
RS-232 Maximum Cable Length
The maximum cable length for RS-232 is 50ft, but in practise depends on baud rate, cable
specific capacitance and ambient noise. The table below contains some rules-of-thumb from
experiments done by Texas Instruments years ago.
Baud rate
Maximum range / cable length
19200
50ft
9600
500ft
4800
1000ft
What is RS232?
"In telecommunications, RS‐232 is a standard for serial communication transmission of data. It formally
defines the signals connecting between a DTE (data terminal equipment) such as a computer terminal,
and a DCE (data circuit‐terminating equipment or data communication equipment), such as a modem.
The RS‐232 standard is commonly used in computer serial ports. The standard defines the electrical
characteristics and timing of signals, the meaning of signals, and the physical size and pinout of
connectors. The current version of the standard is TIA‐232‐F Interface Between Data Terminal
Equipment and Data Circuit‐Terminating Equipment Employing Serial Binary Data Interchange, issued in
1997." From Wikipedia
SPECIFICATION
4 pin connector ‐ GND, Logic out (STX), +5v, Logic In (SRX)
Suitable for use with most microcontrollers
300 to 115200 bauds
Pre‐assembled board
DB9 Female Connector (RS‐232)
Standard Header Connector (TTL)
SHIPPING LIST
RS232-TTL Converter x1
RS232 interface pinout
https://www.dfrobot.com/product‐196.html 8‐10‐18
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