MK2746
DVD/MPEG C
LOCK
S
OURCE
Description
The MK2746 is a low cost, low jitter, high performance
clock synthesizer for DVD and other MPEG2 based
applications. Using analog Phase Locked Loop (PLL)
techniques, the device accepts a 27 MHz fundamental
mode crystal or clock input to produce multiple output
clocks including the processor clock, audio clock, bus
driver clock, SDRAM clock and a Video clock. The
audio clocks are frequency locked to the 27 MHz input
using our patented zero ppm error techniques, allowing
audio and video to track exactly, thereby eliminating the
need for large buffer memory.
ICS manufacturers the largest variety of DVD, set top
box, and multimedia clock synthesizers for all
applications.
Features
•
Packaged in 16 pin TSSOP
•
Operating voltage of 3.3 V
•
Provides tight jitter controlled selectable processor
clock per table.
•
Provides selectable audio clock per table.
•
Provides fixed outputs of 27 MHz (Video), 50 MHz
(DSP/Bus clock) and 133.33 MHz (SDRAM).
•
Advanced, low power, sub-micron CMOS process
Block Diagram
VDD
3
Audio
AS1:0
PLL / Clock
Circuit
PS1:0
27 MHz crystal
or clock
X1
Clock Buffer/
Crystal
Ocsillator
Processor
(Tight Jitter)
50M Bus Clock
133.33 M SDRAM Clock
27M Video Clock
X2
2
GND
MDS 2746 A
I n t e gra te d C i r c u i t S y s t e m s
●
1
525 Race Stre et, San Jo se, CA 9 5126
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Revision 100802
te l (40 8) 2 95-98 00
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w w w. i c st . c o m
ICS [ INTEGRATED CIRCUIT SYSTEMS ]
