SY100E310L Micrel, Inc. 3.3V ECL/PECL SY100E310L 2:8 DIFFERENTIAL FANOUT BUFFER DESCRIPTION FEATURES Guaranteed AC performance over temperature and The SY100E310L is a 3.3V, precision 2:8 ECL/PECL voltage: fanout buffer optimized for precision low-skew clock distribution. The SY100E310L features fully differential clock > 800MHz f (typical) MAX paths to minimize both device and system skew resulting in < 50ps within-device skew skew performance of < 50ps. In addition, the device includes Low voltage operation: a 2:1 multiplexer input for redundant switchover applications. LVPECL: +3.3V 10% The SY100E310L is optimized for low voltage +3.3V LVECL: 3.3V 10% LVPECL or 3.3V LVECL applications. Internal 75k pull-down resistors Data sheets and support documentation can be found on Micrels web site at www.micrel.com. Guaranteed over industrial temperature range: 40C to +85C Pin-for-pin, plug-in replacement for MC100LVE310 Available in 28-pin PLCC package APPLICATIONS CROSS REFERENCE TABLE Communications clock distribution Micrel Semiconductor On Semiconductor Redundant clock switchover SY100E310LJI MC100LVE310FN High-end server clock distribution SY100E310LJITR MC100LVE310FNR2 FUNCTIONAL BLOCK DIAGRAM TYPICAL PERFORMANCE Q0 Output Swing vs. Frequency /Q0 900 Q1 800 /Q1 700 600 Q2 500 /Q2 400 CLKA Q3 300 /CLKA /Q3 200 CLKB Q4 100 /CLKB 0 /Q4 SEL Q5 CLK FREQUENCY (MHz) /Q5 Q6 /Q6 Q7 V BB /Q7 Rev.: D Amendment: /1 M9999-072106 1 Issue Date: July 2006 hbwhelp micrel.com or (408) 955-1690 Q AMPLITUDE (mV) 0 200 400 600 800 1000 1200 1400 1600SY100E310L Micrel, Inc. PACKAGE/ORDERING INFORMATION (1) Ordering Information Package Operating Package Lead Part Number Type Range Marking Finish 4 32 1 282726 SY100E310LJI J28-1 Industrial SY100E310LJI Sn-Pb /CLKB 5 25 Q0 (2) SY100E310LJITR J28-1 Industrial SY100E310LJI Sn-Pb NC 6 24 /Q0 (3) /Q7 7 23 Q1 SY100E310LJY J28-1 Industrial SY100E310LJY with Matte-Sn 8 22 VCCO VCCO Pb-Free bar-line indicator Q7 9 21 /Q1 (2, 3) SY100E310LJYTR J28-1 Industrial SY100E310LJY with Matte-Sn /Q6 10 20 Q2 Q6 11 19 /Q2 Pb-Free bar-line indicator 12 13 14 15 16 17 18 Notes: 1. Contact factory for die availability. Dice are guaranteed at T = 25C, DC Electricals only. A 2. Tape and Reel. 3. Pb-Free package is recommended for new designs. 28-Pin PLCC (J28-1) PIN DESCRIPTION Pin Number Pin Name Pin Function 1 VCC Positive Core Power Supply. Bypass with 0.1 F 0.01 F low ESR capacitors. Not internally connected to V . Must be externally connected to V on PCB. CCO CCO 28, 2, 4, 5 CLKA, /CLKA Differential Inputs: These input pairs are the differential data inputs to the device. CLKB, /CLKB 3 VBB Reference Voltage Output. Used for AC-coupled inputs or single-ended inputs. 6 NC No Connect. 8, 15, 22 VCCO Positive Power Supply. Bypass with 0.1 F 0.01 F low ESR capacitors. Not internally connected to V . Must be externally connected to V on PCB. CC CC 24, 21, 19, /Q0, /Q1, /Q2, /Q3 Differential Outputs. 17, 14, 12, 10, 7 /Q4, /Q5, /Q6, /Q7 25, 23, 20, 18, Q0, Q1, Q2, Q3 Differential Outputs. 16, 13, 11, 9, Q4, Q5, Q6, Q7 26 VEE Negative Supply. 27 CLK SEL Single-Ended Clock Select. M9999-072106 2 hbwhelp micrel.com or (408) 955-1690 /Q5 CLKB Q5 VBB /Q4 /CLKA VCCO VCC Q4 CLKA /Q3 CLK SEL Q3 VEE