Rtl8305nb-vb-cg Ethernet chip reartek original stock
explain
Rtl8305nb-vb is a 5-port 10 / 100M Ethernet switch controller, which integrates memory, 5 Macs and 5 physical layer transceivers for 10Base-T and 100base TX operations into one chip.
In order to complete diagnosis in complex network systems, rtl8305nb-vb provides a loopback feature in each port.
Rtl8305nb-vb supports several advanced QoS functions with four level priority queues to improve multimedia or real-time network applications, including:
multi priority allocation
differential queue weights port based rate limits
queue based rate limits
Rtl8305nb-vb supports 16 VLAN groups. These can be configured as port based VLANs and / or 802.1Q tag based VLANs. Rtl8305nb-vb also supports VLAN learning, with four independent VLAN learning (IVL) filtering databases.
Rtl8305nb-vb contains a 2K entry address lookup table. The four-way associative hash algorithm avoids hash collision and maintains forwarding performance.
The maximum packet length may be 2048 bytes. Three types of independent storm filters are provided to filter packet storms, and an intelligent switch engine is provided to prevent line head blocking.
Rtl8305nb-vb supports energy-saving Ethernet mode (EEE; defined in ieee802.3az) to minimize system power consumption. Energy efficient Ethernet (EEE) supports low power idle mode. When the low power idle mode is enabled, the systems on both sides of the link can disable some functions and save power during the period of low link utilization.
In order to simplify the peripheral power supply circuit, rtl8305nb-vb integrates an LDO regulator to generate 1.2V from a 3.3V input power supply, and only needs an external diode.
features
Basic switch function
5-port switch controller with memory and
Transceivers for 10Base-T and 100base TX
Non blocking linear speed reception and control
Transmission and non front end line blocking
forward
Comply with IEEE 802.3/802.3u automatic negotiation
Built in efficient SRAM for grouping
Buffer with 2K entry lookup tables and two
Four way associative hash algorithm
Maximum packet length of 2048 bytes
Fully support flow control
half duplex: back pressure flow control
full duplex: IEEE 802.3x flow control
Service quality
Support high-performance QoS function on the network
Each port
support level 4 priority queue
weighted cycle service
support strict priority
input / output port bandwidth control
queue based bandwidth control
based on 1q, port, DSCP and IP
Priority based on address and other types
task
Support IEEE 802.1p traffic annotation
Safety and management
Support retention control frame filtering
Support advanced storm filtering
Optional EEPROM interface for
to configure
VLAN function
Support up to 16 VLAN groups
Flexible VLAN based on 802.1Q port / tag
Support four ivls
Leakage VLAN for network
Unicast / multicast / broadcast / ARP packet
Energy saving function
Support energy saving Ethernet (EEE)
Function (IEEE 802.3az)
Energy saving mode of link shutdown
Diagnostic function
Support hardware loop detection function
With LED and buzzer to indicate
Existence of cycle
Support cable diagnosis (rtct function)
Flexible LED indicator
rtct status indication
circuit status indication
The LED flashes when it is reset
diagnosis
Other features
Optional MDI / mdix automatic crossover
Plug and play
Physical layer port polarity detection and
Correction function
Robust baseline drift correction
Improved 100base TX performance
• 25MHz crystal or 3.3V OSC input
It can convert a single 3.3V power input
By integrating LDO regulators to generate
Conversion from 3.3V to 1.2V through low-cost external power supply
diode
Low power consumption, 1.2/3.3v, 55nm CMOS
technology
48 pin QFN "green" package
application
Rtl8305nb-vb is a 5-port 10 / 100M Ethernet switch controller, which integrates memory, 5 Macs and 5 physical layer transceivers for 10Base-T and 100base TX operations into one chip.
In order to complete diagnosis in complex network systems, rtl8305nb-vb provides a loopback feature in each port.
Rtl8305nb-vb supports several advanced QoS functions with four level priority queues to improve multimedia or real-time network applications, including:
multi priority allocation
differential queue weights port based rate limits
queue based rate limits
Rtl8305nb-vb supports 16 VLAN groups. These can be configured as port based VLANs and / or 802.1Q tag based VLANs. Rtl8305nb-vb also supports VLAN learning, with four independent VLAN learning (IVL) filtering databases.
Rtl8305nb-vb contains a 2K entry address lookup table. The four-way associative hash algorithm avoids hash collision and maintains forwarding performance.
The maximum packet length may be 2048 bytes. Three types of independent storm filters are provided to filter packet storms, and an intelligent switch engine is provided to prevent line head blocking.
Rtl8305nb-vb supports energy-saving Ethernet mode (EEE; defined in ieee802.3az) to minimize system power consumption. Energy efficient Ethernet (EEE) supports low power idle mode. When the low power idle mode is enabled, the systems on both sides of the link can disable some functions and save power during the period of low link utilization.
In order to simplify the peripheral power supply circuit, rtl8305nb-vb integrates an LDO regulator to generate 1.2V from a 3.3V input power supply, and only needs an external diode.
features
Basic switch function
5-port switch controller with memory and
Transceivers for 10Base-T and 100base TX
Non blocking linear speed reception and control
Transmission and non front end line blocking
forward
Comply with IEEE 802.3/802.3u automatic negotiation
Built in efficient SRAM for grouping
Buffer with 2K entry lookup tables and two
Four way associative hash algorithm
Maximum packet length of 2048 bytes
Fully support flow control
half duplex: back pressure flow control
full duplex: IEEE 802.3x flow control
Service quality
Support high-performance QoS function on the network
Each port
support level 4 priority queue
weighted cycle service
support strict priority
input / output port bandwidth control
queue based bandwidth control
based on 1q, port, DSCP and IP
Priority based on address and other types
task
Support IEEE 802.1p traffic annotation
Safety and management
Support retention control frame filtering
Support advanced storm filtering
Optional EEPROM interface for
to configure
VLAN function
Support up to 16 VLAN groups
Flexible VLAN based on 802.1Q port / tag
Support four ivls
Leakage VLAN for network
Unicast / multicast / broadcast / ARP packet
Energy saving function
Support energy saving Ethernet (EEE)
Function (IEEE 802.3az)
Energy saving mode of link shutdown
Diagnostic function
Support hardware loop detection function
With LED and buzzer to indicate
Existence of cycle
Support cable diagnosis (rtct function)
Flexible LED indicator
rtct status indication
circuit status indication
The LED flashes when it is reset
diagnosis
Other features
Optional MDI / mdix automatic crossover
Plug and play
Physical layer port polarity detection and
Correction function
Robust baseline drift correction
Improved 100base TX performance
• 25MHz crystal or 3.3V OSC input
It can convert a single 3.3V power input
By integrating LDO regulators to generate
Conversion from 3.3V to 1.2V through low-cost external power supply
diode
Low power consumption, 1.2/3.3v, 55nm CMOS
technology
48 pin QFN "green" package
application
5-port switch (10Base-T and 100base TX)
