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MAX3232 RS232 to TTL Serial Port Converter Module DB9 Connector MAX232 โมดูลแปลงสัญญาณ TTL เป็น RS232/Serial
The products are widely used in radio modification, cell phones Brush, XBOX360 Brush, GPS, vehicle inspection, DVD Brush, hard disk repair, set-top box upgrades.

Can be used to program the microcontroller type:
STC microcontroller
STM32 MCU
NXP microcontroller
Renesas MCU
NEC MCU
Communications chip: Domestic MAX3232
Operating voltage: 3.3V-5.5V
Interface: TX RX VCC GND

Note: Domestic max3232 chip chip, there are some buyers purchase found no compatibility problems, please confirm before buyers to purchase the chip compatible with your system, to avoid buying the wrong, thank you!

Buyer issue summary (we will buyers case problems are listed after the purchase, the buyer for future reference, we believe that the case of failure is greater than the benefits of successful cases buyers):

A Lenovo notebook + Serial small plate (max3232) + usb to serial cable (340 drivers) Download stc89c52 not use; Lenovo desktop + Serial small plates (max3232) + usb to serial cable (340 drivers)

Download stc89c52 normal use; max3232 chip will replace max232 Lenovo laptop + Serial small plates (max232) + usb to serial cable (340 drivers) can normally download download stc89c52

Initially concluded: After max3232 through usb to serial cable, may have incompatibilities with certain notebooks. Buyers encountered a similar situation, you can select the appropriate serial chip based on the above test results.

2 Samsung 2440 development board + max3232 small plate Operating voltage 3.3v serial communications found is not normal, the voltage rises to 3.8v will work properly.