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. 419-930
Mfr. Part No.W5100
BrandWIZnet Inc
TWD184
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. 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. 419-952
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. 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. 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. 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
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. 698-8981
Mfr. Part No.ENC28J60-I/SP
BrandMicrochip
TWD104
Each
units
10BaseT Serial-SPI - Full Duplex, Half Duplex 10 Mbps, 100 Mbps, 1000 Mbps - IEEE 802.3 Through Hole SPDIP 28 - Yes 3.3 V 35.56 x 8.51 x 3.81mm
RS Stock No. 758-1048
Mfr. Part No.W5200
BrandWIZnet Inc
TWD192
Each
units
10BaseT, 100BaseTX SPI MDI/MDIX Full Duplex, Half Duplex 10 Mbps, 100 Mbps Internal - Surface Mount QFN 48 Yes - 3.63 V dc 7 x 7 x 0.7mm
RS Stock No. 155-9320
Mfr. Part No.LTC4265CDE#PBF
TWD108
Each (In a Tube of 91)
units
PoE-Base - PD Interface - - - IEEE 802.3 Surface Mount DFN 12 - - 60 (Max.) V 4 x 3 x 0.7mm
RS Stock No. 665-8989
Mfr. Part No.TPS2375PW
TWD57
Each (In a Pack of 5)
units
- - - - - - - Surface Mount TSSOP 8 - - - 3 x 4.4 x 1.15mm
RS Stock No. 823-0751
Mfr. Part No.LAN9730I-ABZJ
BrandMicrochip
TWD173
Each (In a Pack of 2)
units
10BaseT, 100BaseTX USB MII Full Duplex, Half Duplex 10 Mbps, 100 Mbps - IEEE 802.3, IEEE 802.3u Surface Mount QFN 56 Yes - 3.3 V 8.15 x 8.15 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
RS Stock No. 155-9321
Mfr. Part No.LTC4265IDE#PBF
TWD129
Each (In a Tube of 91)
units
PoE-Base - PD Interface - - - IEEE 802.3 Surface Mount DFN 12 - - 60 (Max.) V 4 x 3 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. 889-5421
Mfr. Part No.LAN91C111I-NS
BrandMicrochip
TWD697
Each (In a Tray of 66)
units
10BaseT, 100BaseTX ISA MII Full Duplex, Half Duplex 10 Mbps, 100 Mbps Internal IEEE 802.3u Surface Mount QFP 128 Yes Yes 3.3 V 14.2 x 14.2 x 1.05mm
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. 887-7215
Mfr. Part No.LAN9500A-ABZJ
BrandMicrochip
TWD109
Each (In a Tray of 260)
units
10BaseT, 100BaseTX USB MII Full Duplex, Half Duplex 100Mbps External, Internal IEEE 802.3, IEEE 802.3u Surface Mount QFN 56 Yes - 3.3 V 8.15 x 8.15 x 0.95mm