MK2722-01S ICST [Integrated Circuit Systems], MK2722-01S Datasheet

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MK2722-01S

Manufacturer Part Number
MK2722-01S
Description
Sigma Designs Clock Source
Manufacturer
ICST [Integrated Circuit Systems]
Datasheet
MDS 2722 B
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose • CA • 95126 • (408)295 9800tel • www.icst.com
The MK2722 is a low cost, low jitter, high performance
clock synthesizer designed for Sigma Designs’ MPEG
decoder systems. Using analog Phase-Locked Loop
(PLL) techniques, the device accepts a 27 MHz crystal
or clock input to produce multiple output clocks. The
power down pin turns off the device, drawing less than
100 µA.
ICS offers a wide variety of clock synthesizers for
desktop and portable computers, and multimedia
systems. Consult ICS to eliminate crystals and
oscillators from your board.
Block Diagram
Description
27 MHz crystal
or clock
X1
X2
AS1:0
BS1:0
PD
Oscillator
Crystal
2
2
VDD
Control Circuitry
Synthesis and
3
Clock
GND
1
• Packaged in 16 pin narrow (150 mil) SOIC
• Uses 27 MHz crystal or clock input
• Zero ppm synthesis error in all clocks (audio clocks
• Audio clock supports 32, 44.1, and 48kHz
• Power down turns off chip
• Low jitter
• Total of four output clocks
• 25 mA output drive capability at TTL levels
• 5V±10% supply voltage (contact ICS for
• Advanced, low power, sub-micron CMOS process
2
Features
exactly track 27 MHz video clock)
sampling rates at 256X and 384X
3.3V operation)
Sigma Designs Clock Source
Output
Output
Output
Output
Buffer
Buffer
Buffer
Buffer
ACLK
BCLK
BCLK/2
27.0000 MHz
Revision 020802
MK2722

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MK2722-01S Summary of contents

Page 1

... Description The MK2722 is a low cost, low jitter, high performance clock synthesizer designed for Sigma Designs’ MPEG decoder systems. Using analog Phase-Locked Loop (PLL) techniques, the device accepts a 27 MHz crystal or clock input to produce multiple output clocks. The power down pin turns off the device, drawing less than 100 µ ...

Page 2

... AS1 AS0 ACLK pin 12 pin 8 pin 12.288 0 M 18.432 0 1 16.9344 1 0 11.2896 1 M 12.288 1 1 8.192 BCLK Decoding Table (MHz) BS1 BS0 BCLK pin 6 pin 16 pin 40 28.6364 MK2722 BCLK/2 pin 10 20.25 25 14.3182 20 Revision 020802 ...

Page 3

... External Components The MK2722 requires a minimum number of external components for proper operation. Decoupling capacitors of 0.1µF should be connected between VDD and GND (pins 4 and 5, 13 and 11), as close to the MK2722 as possible. A series termination resistor of 33 fundamental mode crystal must be connected as close to the chip as possible. Crystal capacitors should be connected from pins X1 to ground and X2 to ground ...

Page 4

... Integrated Circuit Systems, Inc. • 525 Race Street • San Jose • CA • 95126 • (408)295 9800tel • www.icst.com Sigma Designs Clock Source 45° c Marking Shipping packaging MK2722-01S tubes MK2722-01S tape and reel 4 16 pin SOIC narrow Inches Inches Symbol Min Max A ...

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