CH340 Isolated USB to TTL (Serial) Module With USB-A Connector

The CH340 Isolated USB to TTL (Serial) Module with USB-A Connector, model MCS-86C, is designed for safe and reliable serial communication and debugging under high voltage and interference conditions. It features a CH340 chip with classic and reliable optocoupler isolation, offering 1500V isolation voltage and up to 921600bps communication rate. This module is ideal for applications requiring electrical isolation between USB and serial ports, ensuring protection against short circuits and interference.

Specifications

• Model: MCS-86C

• Main Chip: CH340

• Isolation Voltage: 1500V

• Communication Rate: Up to 921600bps

• Input Voltage: 5V/3.3V switchable

• Optocoupler: High-speed with good waveform

• Power Supply: Integrated isolated power supply, USB plug and play

• Current Output: 100mA maximum

• LED Indicators: Integrated power, sending, and receiving indicators

• Dimensions: 50x24mm (65x24mm with usb)

Pin Functions

Required for Normal Communication

• Level Selection Pin: Selects the signal and power VCC pin level (must be connected to either 5V or 3.3V).

• TX: Serial data transmission pin (module's data outflow).

• RX: Serial data receiving pin (module's data inflow).

• GND: Power ground.

Optional for Communication

• VCC: Power output (voltage determined by the level selection jumper cap, max load 150mA, recommended below 100mA).

• TX-D: TX signal with open-drain output, used for MCU programming.

• 5V: 5V power output (from USB, max load 150mA, recommended below 100mA).

• 3.3V: 3.3V power output (from LDO, max load 150mA, recommended below 100mA).

Features

• Driver Support: Windows/Linux/Mac 32/64 bit operating systems.

• Isolation: Complete electrical isolation, including power supply and GND.

• Signal Protection: Integrated protection diodes for improved shock resistance.

• Reverse Diode TX: TX integrates reverse diodes for safe MCU programming.

• PCB Design: Slotted PCB with isolation distance over 3mm to avoid creepage.

Precautions

• The module integrates an isolated power supply and does not require an external connection. USB plug and play.

• This module is TTL level (5V/3.3V) and cannot be connected to RS-232 level (+-5V to +-15V). Confirm the level of your device before use.

• The default factory level is 3.3V. TX/RX are directly connected; remove it when using.

Baud Rates Supported

• 50, 75, 100, 110, 134.5, 150, 300, 600, 900, 1200, 1800, 2400, 3600, 4800, 9600, 14400, 19200, 28800, 33600, 38400, 56000, 57600, 76800, 115200, 128000, 153600, 230400, 460800, 921600, 1500000, 2000000

Download Driver CH340:

Link 1

Link 2