Description
The MK2745-21 is a low cost, low jitter, high performance clock synthesizer for DVD and other MPEG 2 based applications. Using analog Phase Locked Loop (PLL) techniques, the device accepts
a 27.00MHz fundamental mode crystal or clock input to produce multiple output clocks including
the processor clock, the processor clock divided by two, 27 MHz, 24.576 MHz, and a selectable
audio clock. The audio clocks are frequency locked to the 27.00MHz input using our patented
zero ppm error techniques, allowing audio and video to track exactly, thereby eliminating the
need for large buffer memory.

FEATUREs
• Packaged in 16 pin narrow (150 mil) SOIC
• Ideal for LuxSonor’s DVD solutions
• 3.3V upgrade to MK2744
• Patented zero ppm audio clock error for 256X and 384X sampling rates
• Selectable audio sampling frequencies support 32 kHz, 44.1 kHz, and 48 kHz in most DACs
• 27.00 MHz fundamental crystal or clock input
• Eight selectable processor frequencies
• Fixed clocks of 27 and 24.576 MHz
• Zero ppm error in all clocks
• Full CMOS outputs with 25mA output drive capability at TTL levels
• Advanced, low power, sub-micron CMOS process
• 3.0V to 5.5V operating voltage
• See also the MK2712 for NTSC/PAL clocks