CH339: Industrial 7-Port USB 2.0 Hub with Ethernet, SD Reader & PD in One Chip

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CH339 Datasheet (CH339DS1.PDF) from Nanjing Qinheng Microelectronics (WCH).

This is the official product manual/datasheet page for the CH339, an industrial-grade 7-port multi-function USB 2.0 HUB controller chip.

Core function: Single-chip 7-port USB 2.0 High-Speed HUB with MTT (Multi Transaction Translator) mode for full concurrent bandwidth on all downstream ports (up to ~7× the bandwidth of single-TT designs).
Integrated extras:
- USB 100 Mbit Ethernet (built-in MAC + PHY)
- USB high-speed SD/MMC card reader
- USB PD (Power Delivery) support
- USB-to-SPI, USB-to-JTAG, USB-to-UART, USB-to-I2C (and SMBus on some variants)
Upstream: USB 2.0 High-Speed / Full-Speed
Downstream ports: High-Speed (480 Mbps), Full-Speed (12 Mbps), Low-Speed (1.5 Mbps)
Independent or GANG power control + over-current detection per port
Industrial temperature range: –40 °C to +85 °C
Enhanced 6 kV ESD on USB pins
Packages: QFN68 (CH339W – full features) and smaller QFN32 (CH339F – reduced port count/features)
Typical applications: PC/industrial motherboards, docking stations, peripherals, embedded systems

File details (from the official page): ~493 KB, Version 1.3, last listed update 2026-05-07.

I downloaded an English-translated version of the datasheet (based on the Chinese original) to the working directory:

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