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參數(shù)資料
| 型號： | 9248BF-55LF |
| 廠商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分類： | 時鐘產(chǎn)生/分配 |
| 英文描述： | 133 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
| 封裝： | 0.300 INCH, SSOP-48 |
| 文件頁數(shù)： | 3/10頁 |
| 文件大?。?/td> | 271K |
| 代理商： | 9248BF-55LF |
2
ICS9248-55
Pin Descriptions
Select Functions
Functionality
CPU
PCI,
PCI_F
REF
IOAPIC
48 MHz
Selection
Tristate
HI - Z
Testmode
TCLK/2
1
TCLK/61
TCLK1
TCLK/21
Spread Spectrum
Modulated2
14.318MHz
48.0MHz
PIN NUMBER
PIN NAME
TYPE
DESCRIPTION
1, 2
REF0, REF1
OUT
14.318MHz clock output
3
GND1
PWR
Ground for REF outputs
4X1
IN
XTAL_IN 14.318MHz Crystal input, has internal 33pF
load cap and feed back resistor from X2
5
X2
OUT
XTAL_OUT Crystal output, has internal load cap 33pF
6, 12, 18
GND2
PWR
Ground for PCI outputs
7
PCICLK_F
OUT
Free Running PCI output
8, 10, 11, 13, 14, 16, 17
PCICLK (0:6)
OUT
PCI clock outputs. TTL compatible 3.3V
9, 15
VDD2
PWR
Power for PCICLK outputs, nominally 3.3V
19, 33
VDD
PWR
Isolated power for core, nominally 3.3V
20, 32
GND
PWR
Isolated ground for core
21
VDD3
PWR
Power for 48MHz outputs, nominally 3.3V
22, 23
48MHz (0:1)
OUT
48MHz outputs
24
GND3
PWR
Ground for 48MHz outputs
25, 26, 27
FS (0:2)
IN
Frequency Select pins
28
SPREAD#
IN
Enables Spread Spectrum feature when LOW
29
PD#
IN
Powers down chip, active low
30
CPU_STOP#
IN
Halts CPU clocks at logic "0" level when low
31
PCI_STOP#
IN
Halts PCI Bus at logic "0" level when low
37, 41
VDDL2
PWR
Power for CPU outputs, nominally 2.5V
34, 38
GNDL2
PWR
Ground for CPU outputs.
35, 36, 39, 40
CPUCLK (3:0)
OUT
CPU and Host clock outputs @ 2.5V
42
N/C
-
Not internally connected
43
GNDL1
PWR
Ground for IOAPIC outputs
44, 45
IOAPIC (0:1)
OUT
IOAPIC outputs (14.318MHz) @ 2.5V
46
VDDL1
PWR
Power for IOAPIC outputs, nominally 2.5V
47
SS_SEL
IN
±.25% Spread Spectrum Selector at power up.
Logic 0 for Downspread
Logic 1 for Centerspread
REF2
OUT
14.318MHz clock output
48
VDD1
PWR
Supply for REF (0:2), X1, X2, nominal 3.3V
FS2
FS1
FS0
CPU MHz
PCI MHz
0
133
33.25
0
1
83.3
41.65
01
0
75
37.5
0
1
66.6
33.3
1
0
124
41.33
1
0
1
133
44.3
1
0
112
37.3
1
100
33.3
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 9248BF-81LF | 功能描述:時鐘發(fā)生器及支持產(chǎn)品 RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56 |
| 9248BF-81LFT | 功能描述:時鐘發(fā)生器及支持產(chǎn)品 RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56 |
| 9248DF-39LF | 功能描述:時鐘發(fā)生器及支持產(chǎn)品 RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56 |
| 9248DF-39LFT | 功能描述:時鐘發(fā)生器及支持產(chǎn)品 RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56 |
| 9248EGM | 制造商:Excelta Corporation 功能描述:5" TAPER RLVD CUTTER WITH MELDED TEAL GRIPS |
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