SM8720AV

www.DataSheet4U.com SM8720AV 3-PLL Multi-Output Clock Generator OVERVIEW The SM8720AV is a clock generator IC with 3 built-in PLLs. It can simultaneously output a 27MHz master clock and three other clocks with different frequency (CLK1OUT, CLK2OUT, CLK3OUT) derived from the master clock. The 3 generated clocks can be independently turned ON/OFF using control pins and the frequency of CLK3OUT can be switched, allowing unneeded clocks within a system to be switched OFF thereby reducing current consumption. The master clock, supplied by high-stability crystal oscillator external input, allows clocks to be generated with high precision and low jitter and which require no frequency adjustment, making the SM8720AV ideal for digital still cameras and other applications which require multiple high-precision clocks. FEATURES I I PINOUT (Top view) I I I I I 2.7 to 3.3V supply voltage 21mA typ. current consumption (VDD = 3.0V, all outputs with no load) 27MHz master clock (external input) (internal PLL reference clock) Generated clocks 27MHz master clock (REFOUT) 22.5792MHz (CLK1OUT) (ON/OFF switching using control pin) 48.0000MHz (CLK2OUT) (ON/OFF switching using control pin) 36/45/48.6MHz (CLK3OUT) (ON/OFF switching using control pin, frequency switching) Output load 25pF (REFOUT) 15pF (all outputs excluding REFOUT) Low jitter output 140ps typ. peak-to-peak (REFOUT) 220ps typ. peak-to-peak (CLK1OUT, CLK3OUT) 220ps typ. peak-to-peak (CLK2OUT) 16-pin VSOP pack...