KSZ9021RN Product Brief Single-port Gigabit Transceiver with RGMII Support Description The KSZ9021RN is a single-port 10/100/1000Base-T Gigabit transceiver in industry’s smallest footprint, supporting data transfer over standard CAT-5 unshielded twisted pair cable. This device offers robust performance and low power consumption. On-chip integration of termination resistors and LDO controller, along with built-in diagnostic features, significantly reduces the cost and the complexity of Gigabit Ethernet applications. This device is ideal for enabling Gigabit Ethernet performance in SOHO and SMB networking applications, such as SOHO media center, wired/wireless Gigabit SOHO/SMB router, and VoIP gateway. The KSZ9021GN provides the Reduced Gigabit Media Independent Interface (RGMII) for direct connection to RGMII MACs in Gigabit Ethernet Processors and Switches for data transfer at 1000 Mbps speed. The device is available in industry’s smallest package, RoHS-compliant 48-pin QFN package. Industrial grade is also available. The datasheet and support documentation can be found on Micrel’s web site at: www.micrel.com. ___________________________________________________________________________________________________________ 10/100 /1000 Mbps RGMII Ethernet MAC KSZ9021 RN MDC / MDIO Management Ma g ne ti cs RGMII On-c hip T erm inati on Res is tors Functional Diagram RJ-45 Connector Media Types : 10Base -T 100Base -TX 1000 Base -T LDO Controller VIN 3 .3 VA VOUT 1.2 V (for core voltages ) LinkMD is a registered trademark of Micrel, Inc. Micrel, Inc. TEL: +1 408.944.0800 FAX: + 1 408.474.1000 http://www.micrel.com Features Benefits RGMII MAC interface Standard compliant MAC interface supports direct connection to RGMII MACs in Ethernet processors and switches at 10/100/1000 Mbps data speeds. Integration of termination resistors on the chip On-chip termination (eliminating 8 external resistors) not only simplifies PCB design and reduces system BOM, but also improves overall signal integrity and EMI emission. Integration of a LDO controller on the chip Integration of a LDO controller permits a low cost MOSFET to supply the 1.2V core, which reduces board cost and simplifies board layout. ® LinkMD TDR-based cable diagnostics Built-in LinkMD diagnostics helps identification of common cabling problems, including those not addressed by IEEE. It simplifies network deployment and reduces network downtime. Automatic MDI/MDIX crossover for IEEE 802.3 and EIA/TIA 568 standards at all speeds of operation Auto-MDI/MDIX eliminates the need for cross-over cable, thus reduces installation costs. Easy to use. Integrated 125MHz reference clock 125MHz clock output to the MAC eliminates external 125MHz oscillator and lowers the Bill Of Materials cost. ® Applications ∑ SOHO Media Center ∑ Voice-over-Internet Protocol (VoIP) Gateway ∑ Network Attached Storage ∑ Laser Printers and Projectors ∑ Wired/wireless Gigabit SOHO/SMB Router Media Converter ∑ VPN/Firewall based SMB/SME Router ∑ Gigabit Ethernet LAN on Motherboard ∑ Integrated Broadband CPE (ADSL/VDSL/FTTH) Router Corporate Sales Offices Location Address Telephone Fax Corporate HQ 2180 Fortune Dr. San Jose, CA 95131 USA (408) 944-0800 (408) 474-1000 Western USA 2180 Fortune Dr. San Jose, CA 95131 USA (408) 944-0800 (408) 474-1000 Central USA 2425 N. Central Expressway, Suite 351 Richardson, TX 57080 USA (972) 393-2533 (408) 474-1210 Eastern USA 93 Branch St. Medford, NJ 08055 USA (609) 654-0078 (609) 654-0989 Latin America 2425 N. Central Expressway, Suite 351 Richardson, TX 57080 USA (972) 393-2533 (408) 474-1210 China No. 2001 & 2002, 20/F, Excellence Times Plaza 4068 Yitian Rd., Futian District Rd. Shenzhen 518048, P.R. China +86-755-8302-7618 +86-755-8302-7637 Japan Queen’s Tower A 14F, 2-3-1, Minato Mirai, NishiKu, Yokohama-Shi Kanagawa 220-6014, Japan +81-45-224-6616 +81-45-224-6716 Korea 4F Manzo 2 Bldg, 198-47, Gungnae-Dong, Bundang-Ku Seongnam-City, Kyungki-do, 463-470, Korea 82 (2) 538-2380 82 (2) 538-2381 Singapore/India 750A Beach Rd., #07-324 The Plaza Singapore 199591 +65-6291-1318 +65-6291-1332 Taiwan 4F, No. 43 Lane 188, Rueiguang Rd., Neihu District Taipei, Taiwan, R.O.C. +866 (2) 8751-0600 +866 (2) 8751-0746 France/Southern Europe Les Laurentides Immeuble Ontario, 3 avenue du Quebec 91140 Villebon sur Yvette, France +33 (0) 1.6092.4190 +33 (0) 1.6092.4189 UK/EMEA 1st Floor, 3 Lockside Place, Mill Lane, Newbury, Berks United Kingdom RG14 5QS +44 (1635) 524455` +44 (1635) 524466 Micrel, Inc. TEL: +1 408.944.0800 FAX: + 1 408.474.1000 http://www.micrel.com M9999-101609