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零件编号 | MK1491-09FTR | ||
描述 | AMD Geode GX2 Clock Source | ||
制造商 | Integrated Circuit Systems | ||
LOGO | |||
1 Page
MK1491-09
AMD Geode™ GX2 Clock Source
Description
The MK1491-09 is a low-cost, low-jitter,
high-performance clock synthesizer for AMD’s
Geode-based computer and portable appliance
applications. Using patented analog Phased-Locked
Loop (PLL) techniques, the device accepts a 14.318
MHz crystal input to produce multiple output clocks. It
provides selectable PCI local bus clocks, 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.
Block Diagram
VDD
6
GND
6
Features
• Packaged in 28-pin SSOP (209 mil body)
• Available in Pb (lead) free packaged
• Provides all critical timing for the AMD Geode
companion chip
• Four selectable PCI clocks
• Three LPC interface clocks
• One Fixed 66 MHz clock
• 2 Reference clocks
• 48 MHz USB and 48 MHz IO support
• Power down mode
• Low EMI Enable pin reduces EMI radiation on PCI
clocks, LCLKS, and 66 MHz clock
• Operating voltage of 3.3 V ±5%
Sel66/33#
PD#
Clocks
4 PCI (66/33 MHz)
3 LCLK (33 MHz)
66 MHz
14.31818 MHz
crystal
XI
XO
Crystal
Oscillator
USB
Clock
48/TS#
48 MHz
REFCLK1
REFCLK0/Spread#
MDS 1491-09 G
1
Revision 080204
Integrated Circuit Systems, Inc. ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com
MK1491-09
AMD Geode™ GX2 Clock Source
Package Outline and Package Dimensions (28-pin SSOP, 209 mil Body)
Package dimensions are kept current with JEDEC Publication No. 95, MO-150
28
INDEX
AREA
12
D
A2
e
b
E1 E
A
A1
Millimeters
Inches
Symbol
A
A1
A2
b
c
D
E
E1
e
L
α
Min Max
— 2.00
0.05 —
1.65 1.85
0.22 0.38
0.09 0.25
9.90 10.50
7.40 8.20
5.00 5.60
0.65 Basic
0.55 0.95
0° 8°
Min Max
— 0.079
0.002 —
0.065 0.073
0.009 0.015
0.0035 0.010
0.390 0.413
0.291 0.323
0.197 0.220
0.0256 Basic
0.022 0.037
0° 8°
The controlling dimensions is inches
-C-
SEATING
PLANE
c
L
Ordering Information
Part / Order Number
Marking
(see note 1)
Low EMI
Feature
Shipping Packaging
MK1491-09F
MK1491-09F
Yes
Tubes
MK1491-09FTR
MK1491-09F
Yes
Tape and Reel
MK1491-09FLN MK1491-09FLN Yes
Tubes
MK1491-09FLNTR MK1491-09FLN Yes
Tape and Reel
Package
28-pin SSOP
28-pin SSOP
28-pin SSOP
28-pin SSOP
Temperature
0 to +70°C
0 to +70°C
0 to +70°C
0 to +70°C
Note:
1. “L” designates Pb (lead) free.
While the information presented herein has been checked for both accuracy and reliability, Integrated Circuit Systems (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.
MDS 1491-09 G
8
Revision 080204
Integrated Circuit Systems, Inc. ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com
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页数 | 8 页 | ||
下载 | [ MK1491-09FTR.PDF 数据手册 ] |
零件编号 | 描述 | 制造商 |
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