Ethernet Protocol Stack Management IC CH395


CH395 is an Ethernet protocol stack management IC which provides Ethernet communication ability for MCU system. CH395 has built-in 10 / 100M Ethernet MAC and PHY and fully compatible with IEEE 802.3 protocol, it also has built-in protocol stack firmware such as PPPOE, IP, DHCP, ARP, ICMP, IGMP, UDP, TCP and etc. A MCU system can easily connect to Ethernet through CH395. CH395 supports 3 types of communication interfaces: 8-bit parallel port, SPI or USART. A MCU/DSP/MPU can use any of the above communication interfaces to operate CH395 for Ethernet communication. The application diagram for CH395 is shown below:


  • Built-in Ethernet MAC and PHY.
  • Supports 10 / 100M, full duplex / half duplex adaptive Ethernet interface, fully compatible with IEEE 802.3 protocol.
  • Supports multiple modes of address filtering.
  • Fully implements full duplex flow control and half duplex back-pressure flow control.
  • Auto MDI/MDIX switching.
  • Implements all TCP/IP protocol suites, such as IPv4, ARP, ICMP, UDP, TCP and etc.
  • Provides 8 independent Socket pairs which can simultaneously send and receive data.
  • Provides 8-bit Passive-Interface which can be connected to MCU's parallel data bus.
  • Provides up to 30MHz SPI interface which can be connected to MCU's SPI bus.
  • Provides up to 3Mbps USART with dynamic baud rate adjustment, which can be connected to MCU.
  • Low power mode supported.
  • Built-in 24K RAM which can be used for Ethernet data transfer. Each Socket's transfer buffer can be freely configured.
  • Built-in 4K EEPROM.
  • Supports 8 GPIOs.
  • RoHS-compliant LQFP64M and LQFP128 package.

relation files

file name file content
CH374DS1.PDF CH374 datasheet. CH374 is a USB-HOST&DEVICE general interface chip. It supports USB host and USB device, supports 12M USB full-speed communication and 1.5M low-speed communication, supports 8-bit parallel interface or SPI interface, supports all types of USB transmission and Hub operation, etc.
CH317DS0.PDF CH317 datasheet, USB2.0 extender control chip, for USB more than 100 meters extension, support HUB extension, pure hardware solution, no driver installation.