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| www.micrel.com KS8721BL/SL Product Brief 3.3V 10/100BASE-TX/FX Physical Layer Transceiver Description The KS8721BL/SL is a 10BASE-T, 100BASE-TX, and 100BASE-FX physical layer transceiver providing MII/ RMII interfaces to MACs and switches. Using a unique mixed-signal design that extends signaling distance while reducing power consumption, the KS8721BL/SL represents Micrel's fourth generation single-port Fast Ethernet PHY. Micrel's architecture dissipates an ultra-low 275mW in power, including transmit output drivers. This translates to 's increased reliability while enabling deployment in today's power-sensitive applications. Multiple power-down modes, accessed via configuration pins or registers, allow further levels of power saving through manual selection or automatic detection of cable energy. The KS8721BL/SL automatically configures itself for 100Mbps or 10Mbps and full- or half-duplex operation, using an on-chip auto-negotiation algorithm. Combined with Auto MDI/MDIX for automatic correction and detection of crossover and straight-through cables, the KS8721BL/SL provides an easy-to-use, high performance solution for 10BASE-T, 100BASE-TX, and 100BASE-FX applications. For additional information, contact your local Micrel Field Application Engineer or salesperson. Block Diagram NRZ/NRZI MLT3 Encoder 4B/5B Encoder Scrambler Parallel/Serial TXD3 TXD2 TXD1 TXD0 TXER TXC TXEN CRS COL MDIO MDC RXD3 RXD2 RXD1 RXD0 RXER RXDV RXC TX+ TX- Transmitter 10/100 Pulse Shaper Parallel/Serial Manchester Encoder MII/RMII Registers and Controller Interface RX+ RX- Adaptive EQ Baseline Wander Correction MLT3 Decoder NRZI/NRZ Clock Recovery 4B/5B Decoder Descrambler Serial/Parallel Auto Negotiation Manchester Decoder Serial/Parallel 10BASE-T Receiver Power-Down/ Power-Saving XI XO PLL PWRDWN LED Driver LINK COL FDX SPD Micrel Semiconductor TEL: 1.408.944.0800 FAX: 1.408.474.1000 HTTP:// www.micrel.com Features * Single chip 10BASE-T, 100BASE-TX, and 100BASE-FX physical layer solution * Fully compliant to IEEE802.3u standards * Low-power CMOS design, power consumption * Supports media independent interface (MII) and reduced MII (RMII) * Delivers robust operation (130 meters+) * Furnishes Auto MDI/MDI-X * Offers both power-down and power-saving modes * Single 3.3V power supply * Configurable through MII serial management ports or via external control pins * Available in lead-free and industrial temperature versions * Offered in flexible package options Benefits * Supports back-to-back operation for copper-to-fiber media converter applications. * Designed to operate with link partners at all speeds. * Increased reliability, greater range of power-sensitive < 275mW (including output driver current) applications. * Flexible switch/MAC interfacing options. Optimized pin count interfaces lower cost through reduced trace/simplified routing. * Operation over the widest variety of cabling plants. * Automatic detection and correction for straight-through or crossover cables. * Automatically shuts down upon cable removal extending battery life for mobile applications. * Easy migration from earlier KS8721B/BT family members. * Programmable in environments with and without CPU. * Environmentally friendly and rugged. * KS8721BL in 48-pin LQFP for space-constrained and KS8721SL in mainstream 48-pin SSOP. Applications LAN on Motherboard Media Converter Set-Top Box Cable/DSL Modem Network Printer Game Console RJ-45 with Integrated Magnetics KS8721BL/SL Fast Ethernet PHY MII/ RMII Print Engine ASIC KS8721BL/SL Fast Ethernet PHY RJ-45 with Integrated Magnetics RMII KS8721BL/SL Fast Ethernet PHY Fiber Module Network Printer Application Media Converter Application Contact Micrel Semiconductor Location Corporate HQ Eastern USA Central USA Western USA China Korea Taiwan Singapore Japan Europe Western Europe Address 1849 Fortune Drive 93 Branch Street 722 S. Denton Tap Suite 130 2180 Fortune Drive Room 712, Block B, Intl. Chamber of Commerce Bldg., Fuhua Rd 1, Futian 4F, KTB Building, 826-14, Yeoksam-dong, Kangnam-ku 4F, No. 18, Lane 321, Yang-Guang Street, Nei-Hu Chu 8 Temasek Blvd., #42-01 Suntec Tower Three 1-16-15 Dogenzaka, Shibuyaku 1st Floor, 3 Lockside Place, Mill Lane 10, avenue du Quebec, Villebon BP116 San Jose, CA 95131 USA Medford, NJ 08055 USA Coppell, TX 75019 USA San Jose, CA 95131 USA ShenZhen, PR China 518026 Seoul 135-080 Korea Taipei, 11475 Taiwan, R.O.C. Singapore 038988 Tokyo 150-0043 Japan Newbury, Berks RG14 5QS UK Courtaboeuf Cedex 91944 France Telephone +1 (408) 944-0800 +1 (609) 654-0078 +1 (972) 393-2533 +1 (408) 944-0800 +86 (755) 8302-7618 +82 (2) 3466-3000 +886 (2) 8751-0600 +65-6832-7692 +81 (3) 5428-0871 +44 1635 524455 +33 (0) 1-6092-4190 Fax +1 (408) 474-1000 +1 (609) 546-0989 +1 (972) 393-2540 +1 (408) 914-7878 +86 (755) 8302-7637 +82 (2) 3466-2999 +886 (2) 8751-0746 +65-6832-7693 +81 (3) 5428-0872 +44 1635 524466 +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 |
Price & Availability of KS8721BL
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