SY89828L

MicreL, Inc. 3.3V 1GHz DUAL 1:10 PRECISION LVDS FANOUT BUFFER/ Precision Edge® Precision ESdY8g9e8®28L SY89828L TRANSLATOR WITH 2:1 INPUT MUX FEATURES ■ High-performance dual 1:10, 1GHz LVDS fanout buffer/translator ■ Two banks of 10 differential LVDS outputs ■ Guaranteed AC parameters over temperature and voltage: > 1GHz fMAX < 50ps within device skew < 400ps tr, tf time ■ Each bank includes a 2:1 input mux ■ 2:1 mux input accepts LVDS and LVPECL ■ Low jitter performance < 1psRMS cycle-to-cycle jitter < 1psPP total jitter ■ 3.3V supply voltage ■ Output enable function ■ LVDS input includes internal 100Ω termination ■ Available in a 64-Pin EPAD-TQFP APPLICATIONS ■ Enterprise networking ■ High-end servers ■ Communications TYPICAL APPLICATION CIRCUIT Precision Edge® DESCRIPTION The SY89828L is a precision fanout buffer with 20 differential LVDS (Low Voltage Differential Swing) output pairs. The part is designed for use in low voltage 3.3V applications that require a large number of outputs to drive precisely aligned, ultra low-skew signals to their destination. The input is multiplexed from either LVDS or LVPECL (Low Voltage Positive Emitter Coupled Logic) by the CLK_SEL1 and CLK_SEL2 pins. The Output Enables (OE1 and OE2) are synchronous so that the outputs will only be enabled/ disabled when they are already in the LOW state. This avoids any chance of generating a runt clock pulse when the device is enabled/disabled as can happen with an asynchronous control. T...