ProductsIntegrated CircuitsCH341A
PACKAGE REFERENCESOP-28Confirm case, pinout and ordering suffix before purchase.
MANUFACTURER PART RECORD

CH341A

WCH

CH341A is a WCH USB bus adapter chip — USB 2.0 full-speed device bridging to UART (up to 2 Mbps), I2C, SPI and GPIO, 5 V and 3.3 V supply, SOP-28 package (external crystal required). The multi-protocol bridge is the selection point: one chip turns a USB port into a UART/I2C/SPI programmer and debugger interface — the heart of countless USB-to-serial cables and EEPROM programmers. Selection advice: WCH documents the CH341A as a variant of the CH341 family — match the full CH341A code, since the CH341B and other variants differ in package and pinout. For UART-only use the CH340 series is cheaper; choose the CH341A when you need I2C/SPI bridging too. Note the external crystal requirement in the BOM — the SOP-28 footprint plus crystal is the complete circuit. Evidence: WCH official data confirms USB 2.0 full-speed, UART/I2C/SPI/GPIO, SOP-28, external crystal. State quantity, packing and date-code requirements in your RFQ; we reconfirm the offered lot before quotation and reply within 24 hours.

Integrated CircuitsUSB to serial converterSOP-28
MPN
CH341A
Manufacturer
WCH
Family
USB to serial converter
Package
SOP-28
Manufacturer channel coverage
Checked by RFQ
Data last checked
Commercial check required
PROCUREMENT DATA

Identity and sourcing requirements.

Manufacturer part number
CH341A
Manufacturer
WCH
Product family
USB to serial converter
Category
Integrated Circuits
Package reference
SOP-28
Manufacturer-channel report
Confirmed on request
Sourceics price status
Quoted for required quantity
Sourceics sourcing status
Supplier and stock verified during RFQ
Required order checks
Suffix, package, date code, lot, source and traceability
SELECTION GUIDANCE

CH341A selection guidance

CH341A is a USB to serial converter from WCH, orderable in the SOP-28 package. The ordering code fixes the exact configuration you receive — package, grade and packing — so procurement starts with matching this code character-for-character against your BOM, not just the base series name.

When you request a quote, include the full ordering code, the target packing format (reel, tube, tray or cut tape), your quantity and any date-code or lot requirements. We reconfirm manufacturer, suffix, package, date code and traceability against the actual offered lot before any commercial quote is issued, and every RFQ gets a reply within 24 hours.

QUOTE WORKFLOW

Four checks before a commercial offer.

01

Identity

Exact MPN, manufacturer and suffix

02

Supply

Supplier type, quantity and freshness

03

Evidence

Lot, labels, photos and documents

04

Terms

Price, lead time, payment and shipping

RELATED REFERENCES

Explore more Integrated Circuits records

Browse existing catalog records — same series first, then the same category and manufacturer. These are not confirmed replacements; compatibility requires engineering review.

COMMON QUESTIONS

CH341A FAQ

What do the suffixes in CH341A mean?

Every suffix in a manufacturer ordering code identifies one exact orderable device — package, temperature grade, packing format or a revision. CH341A names the SOP-28 configuration; a code that differs by even one suffix character may be a different device. Always quote the complete code exactly as it appears on your BOM.

What is the difference between package and packing for CH341A?

The package (SOP-28) is the physical form of the device itself. Packing describes how the devices are delivered — reel, tube, tray or cut tape. The same ordering code can ship in different packing formats depending on the lot, so confirm the required packing format when you submit your RFQ.

Can you provide traceability documents for CH341A?

Traceability evidence — lot and date-code information, labels and photos — is confirmed per lot at quotation time, because it depends on the actual lot offered. Tell us which documents your receiving inspection requires when you submit the RFQ, and we will confirm what can be provided for the offered lot.

How do I request a quotation for CH341A?

Add CH341A to your RFQ with the complete ordering code, the manufacturer (WCH), your quantity, the target packing format and any date-code requirements. We reply to every RFQ within 24 hours.