{"product_id":"mini-rs232-to-ttl-serial-converter-max3232-3-3v-5v-arduino","title":"Mini RS232 to TTL Serial Converter — MAX3232, 3.3V\/5V, -40°C to 80°C, Arduino","description":"\u003ch2\u003eMini RS232 to TTL Serial Converter — MAX3232, 3.3V \/ 5V, -40°C to 80°C\u003c\/h2\u003e\u003cp\u003eThis \u003cstrong\u003emini RS232 to TTL serial converter module\u003c\/strong\u003e is based on the Maxim MAX3232 IC, providing bidirectional level conversion between RS232 voltage levels (±12V) and 3.3V or 5V TTL\/CMOS logic levels. It enables direct communication between a PC RS232 serial port (DB9) and Arduino, ESP32, STM32, Raspberry Pi, or any UART-capable microcontroller — without risk of damaging 3.3V or 5V logic from RS232's high-voltage swings. Operating from -40°C to +80°C, it is suitable for industrial and outdoor applications.\u003c\/p\u003e\u003ch3\u003eKey Specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eIC\u003c\/td\u003e\n\u003ctd\u003eMaxim MAX3232\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V or 5V (onboard LDO)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRS232 Voltage\u003c\/td\u003e\n\u003ctd\u003e±12V (standard RS232)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTTL Logic Level\u003c\/td\u003e\n\u003ctd\u003e3.3V or 5V (compatible)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannels\u003c\/td\u003e\n\u003ctd\u003e2 TX + 2 RX (full duplex)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Baud Rate\u003c\/td\u003e\n\u003ctd\u003eUp to 1Mbps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRS232 Connector\u003c\/td\u003e\n\u003ctd\u003eDB9 female (or header pins)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-40°C to +80°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eRS232 vs TTL vs RS485 — Serial Interface Comparison\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eRS232\u003c\/th\u003e\n\u003cth\u003eTTL UART\u003c\/th\u003e\n\u003cth\u003eRS485\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage Levels\u003c\/td\u003e\n\u003ctd\u003e±12V\u003c\/td\u003e\n\u003ctd\u003e0–3.3V or 0–5V\u003c\/td\u003e\n\u003ctd\u003e±5V differential\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Distance\u003c\/td\u003e\n\u003ctd\u003e15m\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;1m\u003c\/td\u003e\n\u003ctd\u003e1200m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTopology\u003c\/td\u003e\n\u003ctd\u003ePoint-to-point\u003c\/td\u003e\n\u003ctd\u003ePoint-to-point\u003c\/td\u003e\n\u003ctd\u003eMulti-drop (32 nodes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMCU Compatible\u003c\/td\u003e\n\u003ctd\u003e❌ (needs converter)\u003c\/td\u003e\n\u003ctd\u003e✅ Direct\u003c\/td\u003e\n\u003ctd\u003e❌ (needs transceiver)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBest For\u003c\/td\u003e\n\u003ctd\u003ePC serial port, legacy equipment\u003c\/td\u003e\n\u003ctd\u003eMCU-to-MCU\u003c\/td\u003e\n\u003ctd\u003eIndustrial multi-node\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eWhy Choose MAX3232 Converter?\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e✅ \u003cstrong\u003eMAX3232 IC\u003c\/strong\u003e — industry-standard RS232 transceiver, 3.3V and 5V compatible\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003e3.3V \/ 5V supply\u003c\/strong\u003e — works with Arduino Uno (5V) and ESP32 \/ STM32 (3.3V)\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003e-40°C to +80°C\u003c\/strong\u003e — reliable in industrial and outdoor environments\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eMini form factor\u003c\/strong\u003e — compact module for space-constrained installations\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eFull duplex\u003c\/strong\u003e — simultaneous TX and RX communication\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTypical Applications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eArduino to PC RS232 serial communication\u003c\/li\u003e\n\u003cli\u003eESP32 \/ STM32 RS232 interface for legacy equipment\u003c\/li\u003e\n\u003cli\u003eIndustrial PLC and HMI RS232 communication\u003c\/li\u003e\n\u003cli\u003eGPS and GSM module RS232 to TTL conversion\u003c\/li\u003e\n\u003cli\u003eBarcode scanner and label printer RS232 interface\u003c\/li\u003e\n\u003cli\u003eModbus RTU RS232 master\/slave communication\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003ePackage Contents\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e1 × Mini RS232 to TTL Serial Converter Module 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