SY54020AR Product Brief Low Voltage 1.2V/1.8V/2.5V CML 1:4 Fanout Buffer with /EN 3.2Gbps, 3.2GHz Description The SY54020AR is a fully differential, low voltage or CML differential signals as small as 100mV (200mVpp) 1.2V/1.8V/2.5V CML 1:4 Fanout Buffer with active-low without any level-shifting or termination resistor networks Enable (/EN). The Enable is synchronous so that the in the signal path. For AC-coupled input interface outputs will only be enabled/disabled when they are applications, an internal voltage reference is provided to already in the LOW state. This avoids any chance of bias the VT pin. The outputs are CML, with extremely fast rise/fall times guaranteed to be less than 100ps. generating a runt clock pulse when the device is enabled/disabled as can happen with an asynchronous The SY54020AR operates from a 2.5V ±5% core supply control. When this device is used as a clock fanout, and a 1.2V, 1.8V or 2.5V ±5% output supply and is disabling the downstream clock may reduce system guaranteed over the full industrial temperature range power. The SY54020AR can process clock signals as fast (–40°C to +85°C). as 3.2 GHz or data patterns up to 3.2Gbps. Datasheets and support documentation can be found on The differential input includes Micrel’s unique, 3-pin input Micrel’s web site at: www.micrel.com. termination architecture that interfaces to LVPECL, LVDS ___________________________________________________________________________________________________________ Block Diagram Precision Edge is a registered trademark of Micrel, Inc. MLF is a registered trademark of Amkor Technology. [email protected] or (408) 955-1690 Micrel, Inc. TEL: +1 408.944.0800 FAX: + 1 408.474.1000 http://www.micrel.com Features Benefits 1.2V/1.8V/2.5V CML 1:4 Fanout Buffer with /EN Selectable output voltages provide maximum system flexibility and functionality Active-low Enable (/EN) input to disable the outputs When this device is driving CMOS clocks downstream, this feature can help save power during the non-switching period. Guaranteed AC performance over temperature and voltage: – DC-to > 3.2Gbps Data throughput – DC-to > 3.2GHz Clock throughput – <320 ps propagation delay (IN-to-Q) – <20ps within-device skew – <100 ps rise/fall times High speed and high performance Ultra-low jitter design – <1psRMS cycle-to-cycle jitter Preserves signal integrity and minimizes Bit Error Rate (BER) High-speed CML outputs Low power and low noise 2.5V ±5% VCC , 1.2/1.8V/2.5V ±5% VCCO power supply operation Decreases power consumption Industrial temperature range: –40°C to +85°C Allows device to operate reliably in harsh environments ® Available in 16-pin (3mm x 3mm) MLF package Small size; saves board space and cost Applications Markets • Data Distribution: OC-48, OC-48+FEC • Storage • SONET clock and data distribution • ATE • Fibre Channel clock and data distribution • Test and measurement • Gigabit Ethernet clock and data distribution • Enterprise networking equipment • High-end servers • Access • Metro area network equipment 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 Central USA 2180 Fortune Dr. San Jose, CA 95131 USA (408) 944-0800 (408) 474-1000 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 Rm 601, Bldg., Int’l Chamber of Commerce Mansion, Fuhua Rd., Futian District Shenzhen, 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 Sweden/Nordic Lundagatan 11 6tr SE-171 63 Solna Sweden +46 (8) 470-5950 +46 (8) 470-5950 Micrel, Inc. TEL: +1 408.944.0800 FAX: + 1 408.474.1000 http://www.micrel.com M9999-032309 Micrel, Inc. TEL: +1 408.944.0800 FAX: + 1 408.474.1000 http://www.micrel.com M9999-032309