KS8721BL/SL Product Brief www.micrel.com 3.3V 10/100BASE-TX/FX Physical Layer Transceiver Description The KS8721BL/SL is a 10BASE-T, 100BASE-TX, and The KS8721BL/SL automatically configures itself for 100BASE-FX physical layer transceiver providing MII/ 100Mbps or 10Mbps and full- or half-duplex operation, RMII interfaces to MACs and switches. Using a unique using an on-chip auto-negotiation algorithm. Combined mixed-signal design that extends signaling distance while with Auto MDI/MDIX for automatic correction and detec- reducing power consumption, the KS8721BL/SL repre- tion of crossover and straight-through cables, the sents Micrels fourth generation single-port Fast Ethernet KS8721BL/SL provides an easy-to-use, high performance PHY. solution for 10BASE-T, 100BASE-TX, and 100BASE-FXsolution for 10BASE-T, 100BASE-TX, and 100BASE-FX applications.applications. Micrels architecture dissipates an ultra-low 275mW in power, including transmit output drivers. This translates to For additional information, contact your local Micrel Field For additional information, contact your local Micrel Field increased reliability while enabling deployment in todays s Application Engineer or salesperson. Application Engineer or salesperson. power-sensitive applications. Multiple power-down modes, accessed via configuration pins or registers, allow further levels of power saving through manual selection or auto- matic detection of cable energy. Block Diagram 4B/5B Encoder NRZ/NRZI Scrambler TXD3 MLT3 Encoder 10/100 Parallel/Serial TX+ TXD2 Pulse Transmitter TXD1 TX Shaper TXD0 Parallel/Serial TXER Manchester Encoder TXC TXEN MII/RMII CRS AdaptivAdaptive EQe EQ Registers RX+ COL Baseline WBaseline Wanderander 4B/5B Decoder and Clock MDIO CorrectionCorrection Descrambler Controller Recovery RX MDC MLMLT3 DecoderT3 Decoder Serial/Parallel Interface NRZI/NRZ RXD3 RXD2 RXD1 Auto RXD0 Negotiation RXER RXDV Manchester Decoder 10BASE-T RXC Receiver Serial/Parallel Power-Down/ LINK Power-Saving COL LED XI Driver PLL FDX XO PWRDWN SPD Micrel Semiconductor TEL: 1.408.944.0800 FAX: 1.408.474.1000 HTTP:// www.micrel.com Features Benefits Single chip 10BASE-T, 100BASE-TX, and Supports back-to-back operation for copper-to-fiber media 100BASE-FX physical layer solution converter applications. Fully compliant to IEEE802.3u standards Designed to operate with link partners at all speeds. Low-power CMOS design, power consumption Increased reliability, greater range of power-sensitive < 275mW (including output driver current) applications. Supports media independent interface (MII) and Flexible switch/MAC interfacing options. Optimized pin count reduced MII (RMII) interfaces lower cost through reduced trace/simplified routing. Delivers robust operation (130 meters+) Operation over the widest variety of cabling plants. Furnishes Auto MDI/MDI-X Automatic detection and correction for straight-through or crossover cables. Offers both power-down and power-saving modes Automatically shuts down upon cable removal extending battery life for mobile applications. Single 3.3V power supply Easy migration from earlier KS8721B/BT family members. Configurable through MII serial management ports or Programmable in environments with and without CPU. via external control pins Available in lead-free and industrial temperature versions Environmentally friendly and rugged. Offered in flexible package options KS8721BL in 48-pin LQFP for space-constrained and KS8721SL in mainstream 48-pin SSOP. Applications RJ-45 with LAN on Motherboard Cable/DSL Modem Integrated Media Converter Network Printer Magnetics Set-Top Box Game Console KS8721BL/SL Fast Ethernet PHY RMII RJ-45 with Integrated MII/ Magnetics RMII KS8721BL/SL KS8721BL/SL Fiber Print Engine Fast Ethernet PHY Fast Ethernet PHY Module ASIC Network Printer Application Media Converter Application Contact Contact Contact Contact Contact Micrel Micrel Micrel Micrel Micrel SemiconductorSemiconductorSemiconductorSemiconductorSemiconductor Location Address Telephone Fax Corporate HQ 1849 Fortune Drive San Jose, CA 95131 USA +1 (408) 944-0800 +1 (408) 474-1000 Eastern USA 93 Branch Street Medford, NJ 08055 USA +1 (609) 654-0078 +1 (609) 546-0989 Central USA 722 S. Denton Tap Suite 130 Coppell, TX 75019 USA +1 (972) 393-2533 +1 (972) 393-2540 Western USA 2180 Fortune Drive San Jose, CA 95131 USA +1 (408) 944-0800 +1 (408) 914-7878 China Room 712, Block B, Intl. Chamber of Commerce Bldg., Fuhua Rd 1, Futian ShenZhen, PR China 518026 +86 (755) 8302-7618 +86 (755) 8302-7637 Korea 4F, KTB Building, 826-14, Yeoksam-dong, Kangnam-ku Seoul 135-080 Korea +82 (2) 3466-3000 +82 (2) 3466-2999 Taiwan 4F, No. 18, Lane 321, Yang-Guang Street, Nei-Hu Chu Taipei, 11475 Taiwan, R.O.C. +886 (2) 8751-0600 +886 (2) 8751-0746 Singapore 8 Temasek Blvd., 42-01 Suntec Tower Three Singapore 038988 +65-6832-7692 +65-6832-7693 Japan 1-16-15 Dogenzaka, Shibuyaku Tokyo 150-0043 Japan +81 (3) 5428-0871 +81 (3) 5428-0872 Europe 1st Floor, 3 Lockside Place, Mill Lane Newbury, Berks RG14 5QS UK +44 1635 524455 +44 1635 524466 Western Europe 10, avenue du Quebec, Villebon BP116 Courtaboeuf Cedex 91944 France +33 (0) 1-6092-4190 +33 (0) 1-6092-4189 Micrel Semiconductor TEL: 1.408.944.0800 FAX: 1.408.474.1000 HTTP:// www.micrel.com Stock Code: M1016-070604