RS232 to TTL converter is used for PC serial port and peripheral device level conversion, and can be widely used in single chip microcomputer, embedded system serial port debugging and other occasions. This product is all IC design, electrical performance strictly conforms to RS232 standard and TTL standard, suitable for all standard serial port devices. Internal power-stealing design, no external power supply, more suitable for testing tools.
The EC66 RS232/TTL converter provides level conversion between PC serial ports and peripheral devices, and can be used for microcontroller debugging. It is fully IC‑based, meets RS232 and TTL standards, and draws power internally without an external supply.
The manual explains the three‑wire connector pinout, how to customize the cable or add an external power source, and how to achieve optimal power‑stealing performance by measuring the TTL output voltage and configuring DTR/RTS signals. This manual is written in Chinese.
| TTL high‑level output voltage (ideal) | 4 V – 5 V |
|---|---|
| TTL high‑level output voltage (acceptable range) | 3 V – 4 V |
| Regulator used for external power | 78L05 |