Power 10/100 Transceiver Operating volts meet voltage power requi
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KS8721B Product Brief
Power 10/100 Transceiver
Operating volts meet voltage power requirements, KS8721B 10BaseT/ 100BaseTX/FX Physical Layer Transceiver, which provides transmit receive data. contains 10BaseT Physical Medium Attachment (PMA), Physical Medium Dependent (PMD), Physical Coding Sub-layer (PCS) functions. Moreover, KS8721B on-chip 10BaseT output filtering, which eliminates need external filters allows single line magnetics used meet requirements both 100BaseTX BaseT. KS8721B automatically configure itself 100Mbps 10Mbps full half duplex operation, using on-chip Auto-Negotiation algorithm. ideal choice physical layer transceiver 100BaseTX/ 10BaseT.
Features
Single chip 100BaseTX/100BaseFX/10BaseT physical layer solution 2.5V CMOS design, power consumption 200mW (excluding output driver current) Fully compliant IEEE 802.3u standard Supports Media Independent Interface (MII) Reduced (RMII) Supports 10BaseT, 100BaseTX 100Base-FX with Far_End_Fault Detection Supports power down mode power saving mode Configurable through serial management ports external control pins Supports auto-negotiation manual selection 100Mbps speed full/half-duplex mode On-chip built-in analog front filtering both 100BaseTX 10BaseT outputs link, activity, full/half duplex, collision speed Supports back back, media converter applications Supports MDI/MDI-X auto crossover 2.5V/3.3V tolerance Available 48-pin SSOP
Block Diagram
TXTransmitter 10/100 Pulse Shaper NRZ/NRZI MLT3 Encoder 4B/5B Encoder Scrambler Parallel/Serial Parallel/Serial Manchester Encoder Adaptive Base Line Wander Correction MLT3 Decoder NRZI/NRZ MII/RMII Registers Controller Interface TXD3 TXD2 TXD1 TXD0 TXER TXEN MDIO RXD3 RXD2 RXD1 RXD0 RXER RXDV
Clock Recovery
4B/5B Decoder Descrambler Serial/Parallel
Auto Negotiation 10BaseT Receiver Power Down Saving PWRDWN Manchester Decoder Serial/Parallel
LINK Driver
Micrel Semiconductor
TEL: 1.800.401.9572 FAX: 1.408.474.0159
HTTP:// www.micrel.com
System Level Applications
KS8721B ideal data communication applications where power cost important issues. standard port supplied easy integration.
Management controlled either strapping control pins using management port.
Contact Micrel Semiconductor
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Micrel Semiconductor
TEL: 1.800.401.9572 FAX: 1.408.474.0159
HTTP:// www.micrel.com
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