Ethernet Controllers

Ethernet controllers are an integrated circuit chip that control Ethernet communications. Ethernet is how most computers communicate with each other and is also how most computers connect with the Internet. The internet cable, which plugs into your computer, transfers data to the Ethernet controller, which then decodes the data and puts it into a form your computer can use.
An Ethernet controller determines whether each packet of data is meant for the local computer or another computer on the same network. If the information is meant for the local computer, it decodes that information and relays it to the processor. If the information is meant for another computer on the network, the information is discarded.
Applications
Modern computers have built-in Ethernet controllers on the motherboard. Older computers use a network interface card, which has the Ethernet controller chip on it.

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Description Price Physical Network Type Host Interface Network Interface Communication Mode Data Rate Loopback Mode Standard Supported Mounting Type Package Type Pin Count Auto-Negotiation DMA Support Typical Operating Supply Voltage Dimensions
RS Stock No. 170-0733
Mfr. Part No.W5100
BrandWIZnet Inc
TWD219
Each (In a Tray of 160)
units
10BaseT, 100BaseTX SPI MII Full Duplex, Half Duplex 100Mbps Internal IEEE 802.3u Surface Mount LQFP 80 Yes - 3.3 V 10 x 10 x 1.45mm
RS Stock No. 419-930
Mfr. Part No.W5100
BrandWIZnet Inc
TWD205
Each
units
10BaseT, 100BaseTX SPI MII Full Duplex, Half Duplex 100Mbps Internal IEEE 802.3u Surface Mount LQFP 80 Yes - 3.3 V 10 x 10 x 1.45mm
RS Stock No. 173-0300
Mfr. Part No.RTL8201CP-VD-LF
BrandWIZnet Inc
TWD51
Each (In a Tray of 260)
units
10BaseT, 100BaseTX - MII, SNI Full Duplex, Half Duplex 10 Mbps, 100 Mbps External, Internal IEEE 802.3u Surface Mount LQFP 48 Yes - 3.3 V 7 x 7 x 1.5mm
RS Stock No. 419-952
Mfr. Part No.RTL8201CP-VD-LF
BrandWIZnet Inc
TWD82
Each (In a Pack of 2)
units
10BaseT, 100BaseTX - MII, SNI Full Duplex, Half Duplex 10 Mbps, 100 Mbps External, Internal IEEE 802.3u Surface Mount LQFP 48 Yes - 3.3 V 7 x 7 x 1.5mm
New
RS Stock No. 178-5221
Mfr. Part No.LAN9252I/PT
BrandMicrochip
TWD908
Each (In a Tray of 160)
units
- - - - - - - - - - - - - -
RS Stock No. 880-6718
Mfr. Part No.LAN9252I/PT
BrandMicrochip
TWD415
Each
units
10BaseT, 100BaseTX Host Bus MDI, MDIX, MII, RMII Full Duplex, Half Duplex 100Mbps Internal ANSI X3.263, IEEE 802.3, IEEE 802.3u Surface Mount TQFP 64 Yes Yes 3.3 (Max.) V 10 x 10 x 1.05mm
RS Stock No. 169-8261
Mfr. Part No.CS8900A-CQ3Z
TWD539
Each (In a Tube of 90)
units
10Base2, 10Base5, 10BaseF, 10BaseT ISA AUI Full Duplex, Half Duplex 10Mbps External, Internal IEEE 802.3 Surface Mount LQFP 100 Yes Yes 3.3 V 14 x 14 x 1.4mm
RS Stock No. 228-986
Mfr. Part No.CS8900A-CQ3Z
TWD404
Each
units
10Base2, 10Base5, 10BaseF, 10BaseT ISA AUI Full Duplex, Half Duplex 10Mbps External, Internal IEEE 802.3 Surface Mount LQFP 100 Yes Yes 3.3 V 14 x 14 x 1.4mm
RS Stock No. 880-6714
Mfr. Part No.LAN9252I/ML
BrandMicrochip
TWD454
Each
units
10BaseT, 100BaseTX Host Bus MDI, MDIX, MII, RMII Full Duplex, Half Duplex 100Mbps Internal ANSI X3.263, IEEE 802.3, IEEE 802.3u Surface Mount QFN 64 Yes Yes 3.3 (Max.) V 9 x 9 x 0.95mm
RS Stock No. 698-8987
Mfr. Part No.ENC28J60-I/SO
BrandMicrochip
TWD97
Each
units
10BaseT Serial-SPI SPI Full Duplex, Half Duplex 10 Mbps, 100 Mbps, 1000 Mbps - IEEE 802.3 Surface Mount SOIC 28 - Yes 3.3 V 17.9 x 7.5 x 2.05mm
New
RS Stock No. 178-4863
Mfr. Part No.ENC28J60-I/SO
BrandMicrochip
TWD216
Each (In a Tube of 27)
units
- - - - - - - - - - - - - -
New
RS Stock No. 178-5356
Mfr. Part No.LAN9252I/ML
BrandMicrochip
TWD825
Each (In a Tray of 260)
units
- - - - - - - - - - - - - -
RS Stock No. 758-1045
Mfr. Part No.W7100A-64QFN
BrandWIZnet Inc
TWD236
Each
units
10BaseT, 100BaseTX UART MDI/MDIX Full Duplex 10 Mbps, 100 Mbps External - Surface Mount QFN 64 Yes - 3.3 V dc 9 x 9 x 1.45mm
RS Stock No. 858-0633
Mfr. Part No.LTC4266IUHF#PBF
TWD299
Each
units
IEEE802.3 I2C - - - - IEEE 802.3af Surface Mount QFN 38 - - 3.3 V 7 x 5 x 0.7mm
RS Stock No. 533-8798
Mfr. Part No.DP83816AVNG/NOPB
TWD241
Each
units
10BaseT, 100BaseTX PCI MII Full Duplex, Half Duplex 10 Mbps, 100 Mbps Internal IEEE 802.3u, IEEE 802.3x Surface Mount LQFP 144 Yes Yes 3.3 V 20 x 20 x 1.4mm
RS Stock No. 665-8992
Mfr. Part No.TPS2376D
TWD86
Each (In a Pack of 5)
units
- - - - - - - Surface Mount SOIC 8 - - - 4.9 x 3.91 x 1.58mm
RS Stock No. 162-7567
Mfr. Part No.TPS2375PW
TWD89
Each (In a Tube of 150)
units
- - - - - - - Surface Mount TSSOP 8 - - - 3 x 4.4 x 1.15mm
RS Stock No. 145-7453
Mfr. Part No.LTC4269IDKD-1#PBF
TWD173
Each (In a Tube of 52)
units
PoE-Base - PD Interface - - - IEEE 802.3 Surface Mount DFN 32 - - 60 (Max.) V 7 x 4 x 0.7mm
RS Stock No. 888-4843
Mfr. Part No.LAN9221I-ABZJ
BrandMicrochip
TWD209
Each (In a Tray of 260)
units
10BaseT, 100BaseTX - MII Full Duplex, Half Duplex 10 Mbps, 100 Mbps Internal IEEE 802.3, IEEE 802.3u Surface Mount QFN 56 Yes Yes 3.3 V 7.95 x 7.95 x 0.9mm
RS Stock No. 716-0449
Mfr. Part No.LAN9512-JZX
BrandMicrochip
TWD153
Each
units
10BaseT, 100BaseTX - - Full Duplex, Half Duplex 10 Mbps, 100 Mbps - IEEE 802.3u Surface Mount QFN 64 Yes - 3.3 V 9 x 9 x 3.3mm