KSZ9021RN

KSZ9021RN Product Brief Single-port Gigabit Transceiver with RGMII Support Description The K SZ9021RN i s a s ingle-port 1 0/100/1000Base-T Gigabit t ransceiver i n i ndustry’s s mallest f ootprint, supporting data transfer over standard CAT-5 unshielded twisted pair cable. This device offers robust performance and l ow p ower c onsumption. O n-chip i ntegration o f 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. ___________________________________________________________________________________________________________ Functional Diagram On - c h ip T e rm in a ti o n R e s is to r s RGMII Ma g ne t i cs 10 / 100 / 1000 Mbps RGMII Ethernet MAC KSZ 9021 RN MDC / MDIO Management RJ -45 Connector Media Types : 10 Base -T 100 Base -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 RGMII MAC interface Benefits Standard compliant MAC interface supports direct connection to RGMII MACs in Ethernet processors and switches at 10/100/1000 Mbps data speeds. 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 permits a low cost MOSFET to supply the 1.2V core, which reduces board cost and simplifies board layout. Built-in LinkMD diagnostics helps identification of common cabling problems, including those not addressed by IEEE. It simplifies network deployment and reduces network downtime. Auto-MDI/MDIX eliminates the need for cross-over cable, thus reduces installation costs. Easy to use. 125MHz clock output to the MAC eliminates external 125MHz oscillator and lowers the Bill Of Materials cost. ® Integration of termination resistors on the chip Integration of a LDO controller on the chip LinkMD TDR-based cable diagnostics Automatic MDI/MDIX crossover for IEEE 802.3 and EIA/TIA 568 standards at all speeds of operation Integrated 125MHz reference clock ® 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 Corporate HQ Western USA Central USA Eastern USA Latin America China Japan Korea Singapore/India Taiwan France/Southern Europe UK/EMEA Address 2180 Fortune Dr. 2180 Fortune Dr. 2425 N. Central Expressway, Suite 351 93 Branch St. 2425 N. Central Expressway, Suite 351 No. 2001 & 2002, 20/F, Excellence Times Plaza 4068 Yitian Rd., Futian District Rd. Queen’s Tower A 14F, 2-3-1, Minato Mirai, NishiKu, Yokohama-Shi 4F Manzo 2 Bldg, 198-47, Gungnae-Dong, Bundang-Ku 750A Beach Rd., #07-324 The Plaza 4F, No. 43 Lane 188, Rueiguang Rd., Neihu District Les Laurentides Immeuble Ontario, 3 avenue du Quebec 1st Floor, 3 Lockside Place, Mill Lane, Newbury, Berks San Jose, CA 95131 USA San Jose, CA 95131 USA Richardson, TX 57080 USA Medford, NJ 08055 USA Richardson, TX 57080 USA Shenzhen 518048, P.R. China Kanagawa 220-6014, Japan Seongnam-City, Kyungki-do, 463-470, Korea Singapore 199591 Taipei, Taiwan, R.O.C. 91140 Villebon sur Yvette, France United Kingdom RG14 5QS Telephone (408) 944-0800 (408) 944-0800 (972) 393-2533 (609) 654-0078 (972) 393-2533 +86-755-8302-7618 +81-45-224-6616 82 (2) 538-2380 +65-6291-1318 +866 (2) 8751-0600 +33 (0) 1.6092.4190 +44 (1635) 524455` Fax (408) 474-1000 (408) 474-1000 (408) 474-1210 (609) 654-0989 (408) 474-1210 +86-755-8302-7637 +81-45-224-6716 82 (2) 538-2381 +65-6291-1332 +866 (2) 8751-0746 +33 (0) 1.6092.4189 +44 (1635) 524466 Micrel, Inc. TEL: +1 408.944.0800 FAX: + 1 408.474.1000 http://www.micrel.com M9999-101609