Description
The AK8131S is a member of AKEMD’s low power multi clock generator family designed for a feature rich DTV or STB, requiring a range of system clocks with high performance. The AK8131S generates different frequency clocks from a 27MHz crystal oscillator and provides them to up to four outputs configured by pin-setting. The on-chip VCXO accepts a voltage control input to allow the output clocks to vary by ±100 ppm for synchronizing to the external clock system. Both circuitries of VCXO and PLL in AK8131S are derived from AKEMD’s long-term-experienced clock device technology, and enable clock output to perform low jitter and to operate with very low current consumption. The AK8131S is available in a 16-pin SSOP package.

FEATUREs
■ 27MHz Crystal Input
■ Four Frequency-Selectable Clock Outputs
■ One 27MHz-Reference Output
■ Selectable Clock out Frequencies:
    - 74.1758, 74.250,55.00,51.875,68.333MHz
    - 74.250,66.000,82.000MHz
    - 27.000,54.000MHz
    - 27.000MHz
■ Built-in VCXO
    - Pull Range: ±100ppm (Min.)
■ Low Jitter Performance
    - Period Jitter:
        150 psec (Typ.) at CLK1-4
    - Long Term Jitter :
        150 psec (Typ.) at REFOUT
■ Low Current Consumption: 16.5mA (Typ.) at 3.3V
■ Supply Voltage: 3.0 – 3.6V
■ Operating Temperature Range: -20 to +85℃
■ Package: 16-pin SSOP (Lead free)

APPLICATIONs
■ Digital TV Sets
■ Personal Video Recorders
■ Set-Top-Boxes
■ Multi Media Receivers