The DataSheet of CH315 (the first)

1

USB extension control chip CH315G

USB signal isolation control chip CH315H

DataSheet

Version:1A

http://wch.cn

http://wch-ic.com

1. Introduction

CH315G is USB extension control chip, used for USB signal real time transmit and extend transfer

distance.

CH315H is USB signals isolation control chip, used for USB bus optical isolator or magnetic isolator.

CH315 supports full-speed and low-speed transfer, support USB device dynamic insert and remove.

The following is application image.

2. Features

● supports 12Mbps full-speed and 1.5Mbps low-speed USB transfer, compatible with USB 2.0.

● supports USB control transfer, bulk transfer, interrupt transfer, synchronous/isochronous transfer.

Photic coupler

isolator

Magnetic

coupler

isolator

Power

USB

PC

Or other

USB

Host

CH315H

Upstream

UP#=GND

CH315H

Downstream

UP#=VCC

USB keyboard

USB mice

USB Flash

Drive /Flash

disk

USB printer

USB collection

box

USB controller

USB

Power

Power

USB

PC

Or other

USB

Host

CH315G

Upstream

UP#=GND

CH315G

Downstream

UP#=VCC

USB keyboard

USB mice

USB Flash

Drive /Flash

disk

USB printer

USB collection

box

USB controller

USB

Long distance

Signal transfer

Full-speed 75m

Low-speed 300m

Power

Power