MK2771-13

The MK2771-03 is a low cost, low jitter, high performance VCXO and clock synthesizer designed for set-top boxes. The on-chip Voltage Controlled Crystal Oscillator MK2771-13 accepts a 0 to 3V input voltage to cause the output clocks to vary by ±100 ppm. Using ICS/MicroClock's patented VCXO and analog Phase-Locked Loop (PLL) techniques, the device uses an inexpensive 13.5 MHz crystal input of MK2771-13 to produce multiple output clocks including a selectable processor clock, a selectable audio clock, a fixed 33.33 MHz or 24.576 MHz, two low skew copies of the 27MHz, and a fixed 13.5 MHz. All clocks are frequency locked to the 27.00MHz output (and to each other) with zero ppm error, so any output can be used as the VCXO output.

This chip of MK2771-13 directly replaces the MK2771-03 when a 13.5 MHz input crystal is substituted for the 14.31818 MHz used on the -03. Additionally, the -13 adds 25 MHz to the processor clock selection, and 24.576 MHz on the BCLK.