CH344 - USB to Quad Serial Ports Chip

The CH344 by ETC is a USB to Quad Serial Ports Chip. Below is the official datasheet preview.

Datasheet Details

Part number	CH344
Manufacturer	ETC
File Size	331.68 KB
Description	USB to Quad Serial Ports Chip
Datasheet	CH344-ETC.pdf
Additional preview pages of the CH344 datasheet.

CH344 Product details

Description

Part No. 7mm 0.5mm 19.7mil Standard LQFP 48-pin patch CH344Q LQFP48 7 7mm 0.5mm 19.7mil Standard LQFP 48-pin patch CH344L Note: The USB transceiver of CH344 is designed according to the built-in design of USB2.0, and it is recommended that no external resistor is in series with UD+ and UD- pins.4. Pin definitions CH344Q CH344L Pin Pin No.Pin No.Name 9,24,36, 9,24,36, 48 48 VCC 8,20,23, 8,20,23, 35,47 35,47 GND Pin Type POWER POWER 7 7 RESET IN 43 33

Features

l CH344Q integrates 480Mbps high-speed USB device interface, and CH344L integrates 12Mbps full-speed USB device interface. l Built-in firmware, emulate standard UART interface, used to upgrade the original serial peripheral or expand additional UART via USB. l Original serial.

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Other Datasheets by ETC

CH340 - USB to serial chip
CH341 - USB bus converter
CH342 - USB to Dual Serial Ports
CH343 - USB to High-Speed Serial Chip
CH348 - USB to 8-port serial chip
CH315G - USB extension controller

Published: Apr 19, 2025 |