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IP178A, IP178B, IP178C

Table of contents:
Info of IP178A
Info of IP178B
Info of IP178C

IP178A, IP178B, IP178C Selling Leads, Datasheet

MFG:ICPLUS Package Cooled:QFP D/C:08+

IP178A, IP178B, IP178C Datasheet download

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Part Number: IP178A

MFG: ICPLUS

Package Cooled: QFP

D/C: 08+

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IP178A General Description

IP178A is an 8 port 10/100 Ethernet integrated switch. It consists of an 8-port switch controller and eight Fast Ethernet transceivers. Each of the transceivers complies with the IEEE802.3, IEEE802.3u, and IEEE802.3x specifications. The transceivers in IP178A are designed in DSP approach with advance 0.25um technology; this results in high noise immunity and robust performance.

Two ports of IP178A can be configured as 100BaseFX.

The IP178A operates in store and forward mode. It stores the incoming packet to the internal SSRAM and learns the SA (source address) automatically if the packet is error free. The SA is stored to the internal address table.

IP178A forwards a packet according to DA and address table. When the segments of destination ports are free, it reads the packet from the internal SSRAM and forwards it to the appropriate ports according to the address table.

The incoming packets with errors are dropped. IP178A supports IEEE802.3x, optional backpressure, Auto MDI/MDI-X, CoS, port base VLAN, one MII port and various LED functions, etc.

These functions can be configured to fit the different requirements by feeding operation parameters via EEPROM interface or pull up/down resistors on specified pins.

IP178A Features

· Three-in-one 8 port 10/100 Ethernet switch
- Built in an 8 port Ethernet switch engine
- Built in 8 10/100M transceivers
- Built in SSRAM
· Support flow control
- Support IEEE802.3x for full duplex mode operation
- Support backpressure for half duplex mode operation
· Built in up to 1K MAC address
· An 8 port switching fabric
- Support two-level hashing algorithm to improve address collision
- Support address aging
- Store and forward mode
- Broadcast storm protection
· Full line speed capability of 148800 (14880) packets/sec for 100M (10M)
- Support 1536 byte data transfer for VLAN traffic
- Support one MII port
- Support port base VLAN
- Support CoS
· DSP approach transceivers
- Auto negotiation
- Fully digital adaptive equalizer and timing recovery module
- Base line Wander correction
- 10BaseT, 100BaseT, and 100BaseFX(port6, port7 only) operation
- Automatic MDI/MDI-X configuration
· LED status of Link, Receive, Full duplex, and Speed
· LED with power on diagnostic function
· Set operation parameters via pins or EEPROMinterface
· Utilize single clock source (25Mhz)
· Utilize single power supply (2.5v)
· 0.25um technology
· Packaged in 208 pin PQFP

IP178A Connection Diagram

IP178C General Description

IP178C integrates a 9-port switch controller,SSRAM, and 8 10/100 Ethernet transceivers.Each of the transceivers complies with theIEEE802.3, IEEE802.3u, and IEEE802.3xspecifications. The transceivers are designed inDSP approach in 0.18um technology; they havehigh noise immunity and robust performance.

IP178C operates in store and forward mode. Itsupports flow control, auto MDI/MDI-X, CoS, portbase VLAN, bandwidth control, DiffServ, SMARTMAC and LED functions, etc. Each port can beconfigured as auto-negotiation or forced 10Mbps/100 Mbps, full/half duplexmode. Using anEEPROM or pull up/down resistors on specificpins can configure the desired options.

Besides an 8-port switch application, IP178Csupports one MII/RMII ports for router application,which supports 7 LAN ports and one WAN port.The external MAC can monitor or configureIP178C by accessing MII registers through SMI.

MII/RMII port also can be configured to be MACmode. It is used to interface an external PHY towork as an 8+1 switch.

IP178C Maximum Ratings

Supply Voltage ............................................0.3V to 4.0V
Input Voltage ..............................................0.3V to 5.0V
Output Voltage ............................................0.3V to 5.0V
Storage Temperature ...............................-65°C to 150°C
Ambient Operating Temperature (Ta) ............0°C to 70°C

IP178C Features

· Support 1k MAC address
· Support auto-polarity for 10 Mbps
· Support filter/ forward special DA option
· Support broadcast storm protection
· Auto MDI-MDIX option
· Support port security option to lock the first MAC address
· Support one MII/RMII port, which works at 100 Mbps full duplex for router
· Support port base VLAN & tag VLAN
· Support CoS
· Support SMART MAC function
· Support spanning tree protocol
· Support max forwarding packet length 1552/ 1536 bytes option
· Support 8-level bandwidth control
· Support SCA
· Built in linear regulator control circuit
· Support Lead Free package (Please refer to the Order Information)

IP178C Typical Application

` An 8-port switch application
- If pin 53 EXTMII_EN is pulled low, then MII/ RMII interface is disabled. IP178C is not connected to a CPU and works as an 8-port switch. The ninth switch port MAC8 is unused in this application.
` A 9-port switch application
- If pin 53 EXTMII_EN is pulled high, then MII/ RMII interface is enaled. The ninth switch port MAC8 is connected to a PHY through the MII/RMII interface. IP178C works as a 9-port switch. Because IP178C doesn't access the MII register of the external PHY through SMI, MII/RMII interface should be MAC mode and full duplex in this application.
` An 8-port router application
- IF pin 53 EXTMII_EN is pulled high, then MII/RMII interface is enabled. IP178C is connected to a CPU through MII/ RMII interface. IP178C works as an 8-port router. MII/RMII interface is set to be PHY mode and 100 Mbps full duplex in this application.

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