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MK1491-06S Schematic ( PDF Datasheet ) - Integrated Circuit Systems

Teilenummer MK1491-06S
Beschreibung AMD Geode Clock Source
Hersteller Integrated Circuit Systems
Logo Integrated Circuit Systems Logo 




Gesamt 6 Seiten
MK1491-06S Datasheet, Funktion
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 GeodeClock 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






MK1491-06S Datasheet, Funktion
MK1491-06
CS5530 GeodeClock Source
Package Outline and Package Dimensions
(For current dimensional specifications, see JEDEC Publication No. 95.)
E1 E
INDEX
AREA
1
2
D
A1
e
c
b
28 pin SSOP
Symbol
A
A1
b
c
D
e
E
E1
L
Inches
Min Max
0.053 0.069
0.004 0.010
0.008 0.012
0.007 0.010
0.386 0.394
.025 BSC
0.228 0.244
0.150 0.157
0.016 0.050
Millimeters
Min Max
1.35 1.75
0.10 0.25
0.20 0.30
0.19 0.25
9.80 10.01
0.65 BSC
5.79 6.20
3.81 3.99
0.41 1.27
A
L
Ordering Information
Part/Order Number
MK1491-06R
MK1491-06RTR
MK1491-06S
MK1491-06STR
Marking
MK1491-06R
MK1491-06R
MK1491-06S
MK1491-06S
Low EMI Feature
Yes
Yes
Yes
Yes
Package
Temperature
28 pin SSOP 0 to 70°C
Add Tape & Reel 0 to 70°C
28 pin SOIC 0 to 70°C
Add Tape & Reel 0 to 70°C
While the information presented herein has been checked for both accuracy and reliability, ICS assumes no responsibility for either its use or for the infringement of any patents
or other rights of third parties, which would result from its use. No other circuits, patents, or licenses are implied. This product is intended for use in normal commercial
applications. Any other applications such as those requiring extended temperature range, high reliability, or other extraordinary environmental requirements are not
recommended without additional processing by ICS. ICS reserves the right to change any circuitry or specifications without notice. ICS does not authorize or warrant any ICS
product for use in life support devices or critical medical instruments.
Geode is a trademark of National Semiconductor Corporation
MDS 1491-06 F
6 Revision 101700 Printed 11/15/00
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose • CA • 95126 • (408)295-9800tel • www.icst.com

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