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PDF MK2745-21 Data sheet ( Hoja de datos )
| Número de pieza | MK2745-21 | |
| Descripción | DVD/MPEG Clock Source | |
| Fabricantes | Integrated Circuit Systems | |
| Logotipo |  |
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MK2745-21
DVD/MPEG Clock Source
Description
Features
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.
MicroClock manufactures the largest variety of
DVD, Set-Top Box, and multimedia clock
synthesizers for all applications. Consult
MicroClock to eliminate crystals and oscillators
from your board.
Block Diagram
AS2:0
VDD GND
22
3
• 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
Output
Buffer
Audio Clock
PS1:0
27.00 MHz
clock or
crystal
X1
X2
2
Clock
Buffer/
Crystal
Oscillator
Clock Synthesis
and Control
Circuitry
÷2
Output
Buffer
Output
Buffer
Output
Buffer
Output
Buffer
24.576 MHz
Processor Clock
PCLK/2
27 MHz
MDS 2745-21 B
1
Revision 120400
Printed 12/5/00
Integrated Circuit Systems, Inc.•525 Race Street•San Jose•CA•95126•(408)295-9800tel•www.icst.com
1 page | ||
| Páginas | Total 4 Páginas | |
| PDF Descargar | [ Datasheet MK2745-21.PDF ] | |
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