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PDF MK1491-09FLNTR Data sheet ( Hoja de datos )
| Número de pieza | MK1491-09FLNTR | |
| Descripción | AMD Geode GX2 Clock Source | |
| Fabricantes | Integrated Circuit Systems | |
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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
1 page  
MK1491-09
AMD Geode™ GX2 Clock Source
Absolute Maximum Ratings
Stresses above the ratings listed below can cause permanent damage to the MK1491-09. These ratings,
which are standard values for ICS commercially rated parts, are stress ratings only. Functional operation of
the device at these or any other conditions above those indicated in the operational sections of the
specifications is not implied. Exposure to absolute maximum rating conditions for extended periods can
affect product reliability. Electrical parameters are guaranteed only over the recommended operating
temperature range.
Item
Supply Voltage, VDD (referenced to VSS)
All Inputs and Outputs (referenced to VSS)
Ambient Operating Temperature
Storage Temperature
Junction Temperature
Soldering Temperature (10 seconds max)
Spread Spectrum Enabled for PCI and LPC Clocks
Rating
4.6 V
-0.5 V to VDD+0.5 V
0 to +70°C
-65 to +150°C
125°C
260°C
30 kHz min., 33 kHz max.
DC Electrical Characteristics
Unless stated otherwise, VDD = 3.3 V, Ambient Temperature 0 to +70°C
Parameter
Symbol
Conditions
Min.
Operating Voltage
VDD
3.13
Input High Voltage
Input Low Voltage
Output High Voltage
Output Low Voltage
Operating Supply Current
VIH
VIL
VOH
VOL
IDD
IOH = -12 mA
IOL = 12 mA
VDD = 3.3 V
2
VSS
2.4
Clock Disable Mode
Supply Current
Internal Pull-up Resistor
All inputs except XI
Input Capacitance
CIN All inputs except XI
Typ.
3.3
5
Max.
3.46
VDD
0.8
0.4
60
0.5
Units
V
V
V
V
V
mA
mA
kΩ
pF
MDS 1491-09 G
5
Revision 080204
Integrated Circuit Systems, Inc. ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet MK1491-09FLNTR.PDF ] | |
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