WCH / 沁恒微电子 / TECHNICAL REFERENCE

CH343

USB-to-asynchronous-UART interface bridge chip.

FPGA.io Part Number FIO-17F42646FC607957Internal catalogue reference · manufacturer MPN remains unchanged

Technical reference · Base device — ordering suffix not specified · Checked 2026-09-28

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CH343 — technical feature overview — Technical schematicFPGA.io technical schematic for CH343. Values summarize the documented fields below; consult their source conditions. This is an abstract diagram, not a product photograph, package drawing or pinout. Parameter sources below ↓

DOCUMENTED FACTS

Technical parameters

3 source-linked fields

Values apply to the device and conditions identified in each source. Family maxima, package limits and full ordering-code specifications must not be treated as interchangeable.

Parameter	Documented value	Source & conditions
USB interface	USB 2.0 Full Speed	WCH CH343 USB-to-high-speed-UART official product page ↗概述 and 特点; indexed official product page
UART baud rate	50 bps–6 Mbps	WCH CH343 USB-to-high-speed-UART official product page ↗概述 and 特点; indexed official product page
UART I/O supply options	1.8 / 2.5 / 3.3 / 5 V	WCH CH343 USB-to-high-speed-UART official product page ↗概述 and 特点; indexed official product page

Official documents

WCH CH343 USB-to-high-speed-UART official product page概述 and 特点; indexed official product pageWeb ↗

Ordering and board constraints

This reference identifies a base device. Package, speed grade, temperature, qualification and packing suffixes have not been inferred.

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Series & categories

USB bridges →interface ICs →

COMPLETE PART IDENTITIES

Ordering numbers for CH343

0 documented codes

These references belong to this device. Evidence labels distinguish reviewed specifications, public listings and manufacturer coding examples. Counts describe this site’s documented coverage, not stock or all configurations offered by the manufacturer.

Exact ordering code requires confirmation

The cited public material did not establish a literal complete ordering row in this pass. This is an evidence limit, not a claim that no code exists. The existing device identity is retained; no suffix combinations, neighboring chips, boards or systems are substituted.

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