描述 Description

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 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 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.

特性 Features

? Packaged in 20 pin SOIC

? Pin for pin and functional upgrade to MK2771-03

? Ideal for systems using Oak’s MPEG decoders

? On-chip patented VCXO with pull range of 200ppm

? VCXO tuning voltage of 0 to 3V

? Processor frequency of 16.67 MHz, 20 MHz, 25 MHz, 32 MHz, 40 MHz, or 50 MHz

? Audio clocks of 8.192, 11.2896, and 12.288 MHz

? Zero ppm synthesis error in all clocks (all exactly track 27MHz VCXO) - patented

? Uses an inexpensive 13.5 MHz crystal

? 25mA output drive capability at TTL levels

? Advanced, low power, sub-micron CMOS process

? 5V operating voltage