AK8138C

AK8138C Low power Multiclock Generator with VCXO AK8138C Features 27MHz Crystal Input Four Frequency-Selectable Clock Outputs One 27MHz-Reference Output Selectable Clock out Frequencies: - 74.1758, 74.250MHz - 25.000MHz - 4.9152, 12.000, 24.000,24.576MHz - 33.333MHz Built-in VCXO - Pull Range: ±110ppm (Min.) Low Jitter Performance - Period Jitter: 150 psec (Typ.) at CLK1-4 - Long Term Jitter : 0.85ns (Typ.) 74.1758MHz 160 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) Description The AK8138C is a member of AKM’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 AK8138C 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 ±110 ppm for synchronizing to the external clock system. Both circuitries of VCXO and PLL in AK8138C are derived from AKM’s long-term-experienced clock device technology, and enable clock output to perform low jitter and to operate with very low current consumption. The AK8138C is available in a 16-pin SSOP package. Applications Digital TV Sets Personal Video Recorders Set-Top-Boxes Multi Media Receivers Block Diagram VDD X1 Voltage Controlled Crystal Oscillator PLL1 PLL1 CLK1 ...