CH341 USB to 3.3V 5V TTL UART EERPOM Programmable Flash Serial Converter Adapter

USB to 3.3V/5V TTL Logic Level with Switch Buttons

Length:9.5cm

with LED working Lights showing

Support EEPROM Flash Serial Converter

Support Windows 7/8/10/11/xp/2000/android/mac os/linux/vista

100% Electronic Inspection and Appearance Inspection

CH341 Driver Download,Please click here !

Package: 1 x CH341 USB to TTL Level 3.3v 5v Serial Adapter

Features

2.1. Introduction

Full speed USB device interface, USB 2.0 compatible.

Supports 5V and 3.3V power supply voltages.

Optional: customize the vendor ID, product ID, serial number, etc. via an external low-cost serial EEPROM.

Low cost, convert the original serial port peripheral devices, the original print port printer, and the original parallel port peripheral devices to USB directly.

RoHS compliant SOP-28, SSOP-20 and QFN28 lead-free package.

Only compatible with the applications, and cannot be absolutely the same.

2.2. UART

Emulate standard UART interface, used to upgrade the original serial peripheral or expand additional UART via USB.

Original UART applications are totally compatible without any modification in Windows operating systems.

Hardware full duplex UART interface, integrated transmit-receive buffer, supports communication baud rate varies from 50bps to 2Mbps.

UART supports 5, 6, 7 or 8 data bits, and supports odd, even, space, mark and none parity.

Supports UART transmit enable, UART receive ready rate control signals and so on, and common MODEM interface signals.

Provides further RS232, RS485, RS422 interface, etc. through external voltage conversion chip.

Supports access to the CH341 external serial EEPROM memory in UART communication.

2.3. Printer Port

Standard USB print port for upgrading the original print port printer, compatible with the relevant USB specifications.

Compatible with Windows/Linux/MACOS and so on, and the application is fully compatible.

Supports various standard print port printers, optional low speed printing and high speed printing.

Supports two-way communication of the IEEE-1284 specification and supports one-way and two-way transmission of printers.

2.4. Parallel Port

Two modes are available: EPP mode and MEM mode.

EPP provides signals such as AS#, DS# and WR# etc. Similar to EPP V1.7 or EPP V1.9.

The MEM mode provides signals such as A0, RD# and WR# etc. Which is similar to the memory read/write mode.

2.5. Synchronous serial port

FlexWireTM technology, enables flexible 2-line to 5-line synchronous serial ports through software.

As a Host/Master host, it supports common synchronous serial interfaces such as 2-line and 4-line.

The 2-line interface provides two signal lines SCL and SDA, and supports 4 transmission speeds.

Note: CH341C/T is only used for USB to serial port or USB to 2-line interface.

CH341H is only used for USB to 4-line interface, etc. (such as SPI). New designs are not recommended. CH341B or CH341F is recommended.

CH341A, CH341T and CH341H must be connected with crystal and oscillation capacitor.

CH341B, CH341F and CH341C can choose to connect external crystal and capacitor, or choose not to connect externally and directly use the built-in clock.