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MK1491-06SLFTR 데이터시트 PDF




Integrated Circuit Systems에서 제조한 전자 부품 MK1491-06SLFTR은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

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부품번호 MK1491-06SLFTR 기능
기능 AMD Geode Clock Source
제조업체 Integrated Circuit Systems
로고 Integrated Circuit Systems 로고


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MK1491-06SLFTR 데이터시트, 핀배열, 회로
MK1491-06
AMD Geode™ Clock Source
Description
The MK1491-06 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 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.
Block Diagram
Features
Packaged in 28-pin SOIC or in 28-pin SSOP
Available in Pb (lead) free
Provides all critical timing for the AMD 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)
Operating voltage of 3.3 V ±5%
VDD
6
GND
5
PCI Frequency Select
Low EMI Enable
PCIF Function Enable
Early PCI Enable
SLOW#
PCISTP#
PWRDWN#
2
PCI
Clocks
3 PCI
EPCI/PCI
Audio Select
14.3M/24M Select
14.31818 MHz
crystal
XI
XO
Crystal
Oscillator
Audio
Clock
Fixed
Clocks
MUX
16.394 MHz or
24.576 MHz or
49.152 MHz
48 MHz
14.318 MHz or
24 MHz
3 14.318 MHz
MDS 1491-06 J
1
Revision 110204
Integrated Circuit Systems, Inc. 525 Race Street, San Jose, CA 95126 tel (408) 297-1201 www.icst.com




MK1491-06SLFTR pdf, 반도체, 판매, 대치품
MK1491-06
AMD Geode™ Clock Source
Power Down Control Table
PCISTP# PWRDWN# SLOW# MODE PCI
X 0 X Power down LOW
0 1 X PCI STOP LOW
1 1 X ON ON
PCIF
LOW
ON
ON
24/14.3
LOW
ON
ON
14.3
LOW
ON
ON
Description
All outputs low. PLL’s
and oscillators off.
PCI clocks
synchronously enter
and leave low state.
All clocks on.
Key: 1 = connected to VDD, 0 = connected to ground, X = any valid logic level, combination inputs/outputs
should be connected to VDD or ground through a 10 kresistor as shown below.
Power-on Default Conditions
Pin #
5
8
10
12
13
15
16
21
22
28
Function
TS
SEL AUDIO
SLOW#
FS
SEL 24
PWRDWN#
PCISTP#
LE#
EPCI#
PEN
Default
Condition
M All outputs enabled.
M Audio clock (pin 28) set to 24.576 MHz
1 PCI clocks set to 33.3 MHz. Refer to Power Down Control Table above.
1 PCI frequency = 33.3 MHz.
1 24M/14.3M (pin 19) set to 24 MHz.
1 All clocks running.
1 PCI clocks running.
1 Low EMI function OFF
1 Pin 22 set to normal PCI signal (not early).
M PCI (pin 25) set to PCI clock (33.33 MHz). PCI (pin 24) set to PCIF clock
(33.33 MHz).
MDS 1491-06 J
4
Revision 110204
Integrated Circuit Systems, Inc. 525 Race Street, San Jose, CA 95126 tel (408) 297-1201 www.icst.com

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MK1491-06SLFTR 전자부품, 판매, 대치품
MK1491-06
AMD Geode™ Clock Source
AC Electrical Characteristics
Unless stated otherwise, VDD = 3.3 V ±5%, Ambient Temperature 0 to +70° C
Parameter
Symbol Conditions
Min. Typ.
Input Frequency
Output Clock Rise Time
Output Clock Fall Time
Output Clock Duty Cycle, all
MHz Clocks
FIN
tOR 20% to 80%
tOF 80% to 20%
tOD At 1.5 V
14.31818
45 49 to 51
PCI Output to Output Skew
Rising edges at 1.5 V
Skew of EPCI with respect to
PCI
1
Cycle-to-Cycle Jitter, PCI clocks
250
EMI Reduction, peaks of 5th -
19th odd harmonics
33.3 MHz PCI Clock
6
Power-up Time, PWRDWN#
High to all Clocks Stable
8
Power-on Time, applied VDD to
all Clocks Stable
12
Max.
1.5
1.5
55
500
11
20
25
Units
MHz
ns
ns
%
ps
ns
ps
dB
ms
ms
Thermal Characteristics
Parameter
Symbol Conditions
Thermal Resistance Junction to
Ambient
θJA Still air
θJA 1 m/s air flow
θJA 3 m/s air flow
Thermal Resistance Junction to Case θJC
Min.
Typ.
100
80
67
60
Max.
Units
°C/W
°C/W
°C/W
°C/W
MDS 1491-06 J
7
Revision 110204
Integrated Circuit Systems, Inc. 525 Race Street, San Jose, CA 95126 tel (408) 297-1201 www.icst.com

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부품번호상세설명 및 기능제조사
MK1491-06SLFTR

AMD Geode Clock Source

Integrated Circuit Systems
Integrated Circuit Systems

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