The 7Semi RS232 to TTL Converter Module based on the SP3232EB IC enables bidirectional voltage level conversion between RS232 and TTL logic levels. It is ideal for interfacing microcontrollers or logic-level devices with legacy RS232 serial devices like modems, PCs, and industrial equipment. It includes charge pump circuitry for RS232 voltage generation and offers strong ESD protection, ensuring reliable communication in a compact form factor.

Technical Specification:

IC: SP3232EB
Voltage Supply: 3.0 V to 5.5 V
Communication Standard: RS232 to TTL
RS232 Output Levels: ±5 V (internally generated)
Data Rate: Up to 250 kbps
Channels: 2 transmitters and 2 receivers
Logic Level Compatibility: TTL/CMOS
Protection: ±15 kV ESD protection (Human Body Model), ±8 kV contact
Current Consumption: Low power, typical
Board Type: Breakout module with header pins
Mounting: Through-hole or breadboard compatible

Features:

Bidirectional RS232-to-TTL signal level conversion
Supports full-duplex serial communication
Operates from a single low-voltage supply
Built-in charge pump for RS232 voltage generation
Robust ESD protection for reliable data exchange
Compatible with 3.3V and 5V microcontrollers
Compact breakout design ideal for embedded projects
Supports legacy RS232 interfacing in modern digital systems

Applications:

Interfacing Arduino, ESP32, STM32, or other MCUs with RS232 devices
Serial communication with legacy PCs, modems, or instrumentation
Industrial automation and control systems using RS232 protocols
Embedded systems requiring reliable UART-to-RS232 translation
Data loggers, serial consoles, and communication test tools

74xx Series IC

7Semi RS232 Serial to TTL Converter Module SP3232EB