SM8721AB Datasheet (NPC) - 3-PLL Multi-Output Clock Generator

SM8721AB, 3-PLL Multi-Output Clock Generator

Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Name VDD3 VDD3 VSS3 XTI XTO TEST1 XTAL_SEL FS3 FS2 FS1 CLK1 CLK2ON VSS1 VDD1 VDD1 CLK2 VSS2 VDD2 REF_CLK TEST2 I/O * * * I O I I I I I O I * * * O * * O I Analog supply voltage 3

www.DataSheet4U.com SM8721AB 3-PLL Multi-Output Clock Generator OVERVIEW The SM8721AB is a clock generator IC with 3 built-in PLLs.

It can simultaneously generate and output 3 clocks with different frequency derived from a single master clock.

The generated output clock frequency can be switched using control pins and one clock can be turned ON/OFF (CLK2).

The master clock can be selected from a low-cost 14.31818MHz or small 28.636363MHz crystal.

The device is available in compact 20-pin QFN p

SM8721AB Features

* I I I PINOUT (Top view) VDD1 VDD1 VSS1 CLK2ON CLK1 15 14 13 12 11 I I I I 3.0 to 3.6V supply voltage Crystal oscillator circuit built-in 14.318182/28.636363MHz master clock (internal PLL reference clock) Generated clocks

* 14.318182/17.734450MHz (REF_CLK)

* 71.877274/90.314686/