In today's information and digital era, the Internet has become an indispensable part of our lives and work. In the huge and complex network world, there is an unknown but crucial "traffic policeman" - the switch.

Switch means "switch" and is a network device used for forwarding electrical (optical) signals. It can provide an exclusive electrical signal path for any two network nodes connected to the switch. The most common switch is an Ethernet switch.

It works on the second layer of the OSI model, the data link layer. Its main task is to forward data packets based on MAC addresses to ensure that the data can be delivered to the destination efficiently and accurately. By providing high-speed and stable network connections, switches not only improve the Internet experience of individuals and families, but also greatly promote the business development and data processing efficiency of enterprises and data centers.

For example, a telecommunications broadband network cable is pulled into a university dormitory. There are 7 people in the dormitory. Everyone has a broadband account and wants to access the Internet. How can one network cable be turned into 7 network cables? At this time, a switch can be used to solve the problem. The switch provides a large number of ports for cable connection, so that star topology wiring can be used.

The EN8851E/F series is a highly integrated Ethernet switch chip that uses industry-leading technology to provide the most cost-competitive and lowest-power consumption products for small and medium-sized enterprises, SOHO and retail markets, and targets new 1GE connection needs.

EN8851E/F includes an 8-port Gigabit Ethernet PHY, while supporting high-end applications that require advanced QoS, flexible traffic classification, complex VLAN operations, security features, and has advanced power-saving features to meet market needs. In addition, it also supports link disconnection power saving mode and complies with IEEE802.3az standard.

Scenario application diagram

Product entity diagram

Development board photos

Solution diagram

EN8851E/F system diagram

Core technical

1. Using 28nm process, LQFP128 (14 x 14 mm) package

2. Built-in Andes N10 MCU, with a maximum speed of 500MHz

Built-in 256KB SRAM and configurable operating frequency to save power

3. Supports 8 10/100/1000BASE-T ports and integrates low-power GPHY

4. Support port isolation

5. Support 4Mb message buffering

6.Supports jumbo frames up to 15KB

7. Power consumption 2.2W (@25̊C)

8.EN8851E supports light network management

Solution specifications

1. Embedded 8-port 10/100/1000Base-T PHY

3. Support IEEE 802.3az energy-saving Ethernet

4. Supports power saving when link is disconnected (Green Ethernet)

5. Support serial LED and parallel LED

6. Support VLAN

7. Complies with IEEE 802.3 auto-negotiation

8. External 1.15V voltage converter Buck

9. Ambient temperature range: 0 to 70 ˚ C

10. Double-layer PCB design