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PDF MK1491-06S Data sheet ( Hoja de datos )
| Número de pieza | MK1491-06S | |
| Descripción | CS5530 Geode Clock Source | |
| Fabricantes | Integrated Circuit Systems | |
| Logotipo |  |
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Description
The MK1491-06 is a low cost, low jitter, high
performance clock synthesizer for National
Semiconductor CS5530 based computer and
portable appliance applications. Using patented
analog Phase-Locked Loop (PLL) techniques,
the device accepts a 14.318 MHz crystal input to
produce multiple output clocks. It provides
selectable PCI local bus and AC97 audio clocks,
24 MHz and 48 MHz clocks for Super I/O and
USB, as well as multiple Reference outputs.
The device has multiple power down modes to
reduce power consumption.
MK1491-06
CS5530 Geode™ Clock Source
Features
• Packaged in 28 pin, 300 mil wide SOIC or in
28 pin, 150 mil wide SSOP
• Provides all critical timing for the National
Semiconductor CS5530 Geode companion chip
• Four PCI clocks
• Selectable PCIF on up to 2 outputs
• Early PCI clock selectability
• Up to 4 Reference clocks
• 48 MHz USB and 24MHz SIO support
• AC97 audio clock
• Multiple power down modes
• Low EMI Enable pin reduces EMI radiation on
PCI clocks (patented)
• 3.3 V ±5% operation
Block Diagram
PCI Frequency Select
Low EMI Enable
PCIF Function Enable
Early PCI Enable
SLOW#
PCISTP#
PWRDWN#
Audio Select
VDD
6
2
14.3M/24M Select
XI
14.31818 MHz
crystal
XO
Crystal
Oscillator
GND
5
PCI
Clocks
Output
Buffers
Output
Buffer
3
PCI
EPCI/PCI
Audio
Clock
Fixed
Clocks
MUX
Output
Buffer
Output
Buffer
16.934 MHz or
24.576 MHz or
49.152 MHz
48 MHz
Output
Buffer
14.318 MHz or
24 MHz
Output
Buffers
3
14.318 MHz
MDS 1491-06 F
1 Revision 101700 Printed 11/15/00
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose • CA • 95126 • (408)295-9800tel • www.icst.com
1 page  
MK1491-06
CS5530 Geode™ Clock Source
Package Outline and Package Dimensions
(For current dimensional specifications, see JEDEC Publication No. 95.)
INDEX
AREA
12
D
EH
h x 45°
A1
e
C
B
28 pin SOIC
Symbol
A
A1
B
C
D
E
e
H
h
L
Inches
Min Max
-- 0.104
0.0040 --
0.013 0.020
0.007 0.013
0.697 0.724
0.291 0.299
.050 BSC
0.394 0.419
0.01 0.029
0.016 0.050
Millimeters
Min Max
-- 2.65
0.10 --
0.33 0.51
0.18 0.33
17.70 18.39
7.40 7.60
1.27 BSC
10.01 10.64
0.25 0.74
0.41 1.27
A
L
MDS 1491-06 F
5 Revision 101700 Printed 11/15/00
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose • CA • 95126 • (408)295-9800tel • www.icst.com
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet MK1491-06S.PDF ] | |
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