{"product_id":"rs232-to-ttl-converter-module-sp3232-chip-db9-esd-protection","title":"RS232 to TTL Converter Module – SP3232, DB9, ESD Protection","description":"\n\u003ch2\u003eRS232 to TTL Serial Converter Module with SP3232 Chip \u0026amp; ESD Protection\u003c\/h2\u003e\n\u003cp\u003eBridge the gap between RS232 and TTL devices with this compact, reliable \u003cstrong\u003eRS232 to TTL Converter Module\u003c\/strong\u003e. Powered by the high-performance \u003cstrong\u003eSP3232 chip\u003c\/strong\u003e, this board delivers stable, high-speed serial level conversion for microcontrollers, development boards, embedded systems, and PC serial communication — all in a small 43.69 × 31.37 mm footprint.\u003c\/p\u003e\n\n\u003cp\u003eMade in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRS232 ↔ TTL Level Conversion:\u003c\/strong\u003e Seamlessly converts standard RS232 signals to TTL-level signals compatible with microcontrollers (MCUs), Arduino, Raspberry Pi, and other embedded systems.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSP3232 High-Performance Chip:\u003c\/strong\u003e Features the SP3232 bi-directional level converter for stable, reliable data transfer at high baud rates with minimal signal distortion.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Voltage Range:\u003c\/strong\u003e Operates on 3V–5.5V power supply, making it compatible with both 3.3V and 5V logic systems.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eESD Protection:\u003c\/strong\u003e Built-in electrostatic discharge protection safeguards your components and ensures long-term reliability in demanding environments.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlow Control Support:\u003c\/strong\u003e Supports hardware flow control via CTS\/RTS signals for more reliable data communication.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVersatile Interfaces:\u003c\/strong\u003e Includes a DB9 female RS232 connector, UART TTL pin header interface, plus power and ground connections for flexible integration.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEasy to Use:\u003c\/strong\u003e Plug-and-play design with clearly labeled pins and onboard power\/data indicator LEDs for effortless monitoring.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChip:\u003c\/strong\u003e SP3232\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSupply Voltage:\u003c\/strong\u003e 3V – 5.5V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRS232 Interface:\u003c\/strong\u003e DB9 Female\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTTL Interface:\u003c\/strong\u003e UART pin header (VCC, GND, RxOUT, TxIN, CTS, RTS)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eESD Protection:\u003c\/strong\u003e Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlow Control:\u003c\/strong\u003e CTS \/ RTS supported\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBoard Dimensions:\u003c\/strong\u003e 43.69 × 31.37 mm (1.7 × 1.2 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e New\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Mainland China\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePin Connections\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVCC:\u003c\/strong\u003e Connect to 3V–5.5V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGND:\u003c\/strong\u003e Connect to Ground\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRxOUT:\u003c\/strong\u003e Connect to MCU.RX (Signal: MCU.RX ← SP3232 ← PC.TX)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTxIN:\u003c\/strong\u003e Connect to MCU.TX (Signal: MCU.TX → SP3232 → PC.RX)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCTS:\u003c\/strong\u003e Connect to MCU.CTS (Signal: MCU.CTS ← SP3232 ← PC.RTS)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRTS:\u003c\/strong\u003e Connect to MCU.RTS (Signal: MCU.RTS → SP3232 → PC.CTS)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × RS232 to TTL Converter Board (SP3232)\u003c\/li\u003e\n  \u003cli\u003e1 × 6-PIN Dupont Cable (Loose Head)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cp\u003eLooking for more tools and accessories? Check out these popular items from our store:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/100w-dual-port-car-charger-starlink-mini-fast-charging\"\u003e100W Dual-Port Car Charger for Starlink Mini – Fast Charging\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/140w-usb-c-fast-charging-adapter-auto-power-off-overcharge-protection\"\u003e140W USB-C Fast Charger with Auto Power-Off Overcharge Protection\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFurther Reading\u003c\/h3\u003e\n\u003cp\u003eFor technical standards on serial communication and data interface safety, refer to the \u003ca href=\"https:\/\/www.nist.gov\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eNational Institute of Standards and Technology (NIST)\u003c\/a\u003e, which publishes guidelines on electronics, communications, and hardware interoperability standards.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What is an RS232 to TTL converter module used for?\u003c\/h4\u003e\n\u003cp\u003eA: An RS232 to TTL converter module, like this SP3232-based board, is used to translate the voltage levels of RS232 serial signals (typically ±12V) into TTL-compatible signals (3.3V or 5V) that microcontrollers such as Arduino, STM32, or Raspberry Pi can read and write. It allows you to connect legacy RS232 devices (e.g., PCs with DB9 ports) directly to modern embedded systems.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What voltage does this RS232 to TTL module support?\u003c\/h4\u003e\n\u003cp\u003eA: This RS232 to TTL converter module supports a wide supply voltage range of \u003cstrong\u003e3V to 5.5V\u003c\/strong\u003e, making it compatible with both 3.3V and 5V logic-level microcontrollers and development boards without the need for additional level-shifting components.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Does this module support hardware flow control?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. This SP3232 RS232 to TTL converter board fully supports hardware flow control via \u003cstrong\u003eCTS (Clear To Send)\u003c\/strong\u003e and \u003cstrong\u003eRTS (Request To Send)\u003c\/strong\u003e signal lines, enabling more reliable communication in applications where data flow management is critical.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is ESD protection included on this RS232 converter board?\u003c\/h4\u003e\n\u003cp\u003eA: Yes, this module features built-in \u003cstrong\u003eESD (Electrostatic Discharge) protection\u003c\/strong\u003e, which helps protect your connected components and extends the lifespan of both the converter and the devices it interfaces with, especially in industrial or static-prone environments.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is included in the package?\u003c\/h4\u003e\n\u003cp\u003eA: The package includes \u003cstrong\u003e1 × RS232 to TTL Converter Board\u003c\/strong\u003e (SP3232 chip, DB9 female interface) and \u003cstrong\u003e1 × 6-PIN Dupont Cable\u003c\/strong\u003e (loose head) for easy connection to your MCU or development board.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What is an RS232 to TTL converter module used for?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"An RS232 to TTL converter module, like this SP3232-based board, is used to translate the voltage levels of RS232 serial signals (typically ±12V) into TTL-compatible signals (3.3V or 5V) that microcontrollers such as Arduino, STM32, or Raspberry Pi can read and write. It allows you to connect legacy RS232 devices (e.g., PCs with DB9 ports) directly to modern embedded systems.\"}}, {\"@type\": \"Question\", \"name\": \"What voltage does this RS232 to TTL module support?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This RS232 to TTL converter module supports a wide supply voltage range of 3V to 5.5V, making it compatible with both 3.3V and 5V logic-level microcontrollers and development boards without the need for additional level-shifting components.\"}}, {\"@type\": \"Question\", \"name\": \"Does this module support hardware flow control?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. This SP3232 RS232 to TTL converter board fully supports hardware flow control via CTS (Clear To Send) and RTS (Request To Send) signal lines, enabling more reliable communication in applications where data flow management is critical.\"}}, {\"@type\": \"Question\", \"name\": \"Is ESD protection included on this RS232 converter board?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes, this module features built-in ESD (Electrostatic Discharge) protection, which helps protect your connected components and extends the lifespan of both the converter and the devices it interfaces with, especially in industrial or static-prone environments.\"}}, {\"@type\": \"Question\", \"name\": \"What is included in the package?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The package includes 1 × RS232 to TTL Converter Board (SP3232 chip, DB9 female interface) and 1 × 6-PIN Dupont Cable (loose head) for easy connection to your MCU or development board.\"}}]}\u003c\/script\u003e","brand":"Oasis Select","offers":[{"title":"United States","offer_id":47710916182121,"sku":"200007763:201336106","price":32.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/7931\/3257\/files\/S56a31d2effa14e299a5f6c9c76c5a6bfY.webp?v=1782063026","url":"https:\/\/oasis-select.com\/products\/rs232-to-ttl-converter-module-sp3232-chip-db9-esd-protection","provider":"Oasis Select","version":"1.0","type":"link"}