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參數(shù)資料
| 型號： | CY28409 |
| 廠商： | Cypress Semiconductor Corp. |
| 英文描述： | Clock Synthesizer with Differential SRC and CPU Outputs |
| 中文描述： | 時鐘合成器與微分SRC以及CPU的輸出 |
| 文件頁數(shù)： | 2/18頁 |
| 文件大?。?/td> | 330K |
| 代理商： | CY28409 |
CY28409
Document #: 38-07445 Rev. *B
Page 2 of 18
Pin Description
Pin No.
1, 2
4
Name
Type
O, SE
Reference Clock
. 3.3V 14.318-Mz clock output.
I
Crystal Connection or External Reference Frequency Input
. This pin has dual
functions. It can be used as an external 14.318-MHz crystal connection or as an external
reference frequency input.
O, SE
Crystal Connection
.
Connection for an external 14.318-MHz crystal output.
O, DIF
CPU Clock Output
.
Differential CPU clock outputs. See
Table 1
for frequency config-
uration
O, DIF
CPU Clock Output
.
Differential CPU clock outputs. See
Table 1
for frequency config-
uration
O, DIF
Differential serial reference clock
.
O, SE
66-MHz Clock Output.
3.3V 66-MHz clock from internal VCO.
O, SE
48-/66-MHz Clock Output
.
3.3V selectable through SMBus to be 66 or 48 MHz.
O, SE
Free-running PCI Output
.
33-MHz clocks divided down from 3V66.
O, SE
PCI Clock Output
.
33-MHz clocks divided down from 3V66.
Description
REF(0:1)
XIN
5
41,44,47
XOUT
CPUT(0:2)
40,43,46
CPUC(0:2)
38, 37
22,23,26,27
29
7,8,9
12,13,14,
15,18,19,20
31,
32
51,56
52
SRCT, SRCC
3V66(0:3)
3V66_4VCH
PCIF(0:2)
PCI(0:6)
USB_48
DOT_48
FS_A, FS_B
IREF
O, SE
Fixed 48-MHz clock output
.
O, SE
Fixed 48-MHz clock output
.
I
3.3V LVTTL input for CPU frequency selection
.
I
Current Reference.
A precision resistor is attached to this pin which is connected to
the internal current reference.
I, PU
3.3V LVTTL input for PowerDown# active low
.
I, PU
3.3V LVTTL input for CPU_STP# active low
.
I, PU
3.3V LVTTL input for PCI_STP# active low
.
I
3.3V LVTTL input is a level sensitive strobe used to latch the FS_A and FS_B
inputs
(active low).
I/O
SMBus-compatible SDATA
.
I
SMBus-compatible SCLOCK
.
GND
Ground for current reference
.
PWR
3.3V power supply for PLL
.
GND
Ground for PLL
.
PWR
3.3V power supply for outputs
.
GND
Ground for outputs
.
PWR
3.3V power supply for outputs
.
GND
Ground for outputs
.
PWR
3.3V power supply for outputs
.
GND
Ground for outputs
.
PWR
3.3V power supply for outputs
.
GND
Ground for outputs
.
PWR
3.3V power supply for outputs
.
GND
Ground for outputs
.
PWR
3.3V power supply for outputs
.
GND
Ground for outputs
.
21
50
49
35
PD#
CPU_STP#
PCI_STP#
VTT_PWRGD#
30
28
53
55
54
42,48
45
36
39
34
33
10,16
11,17
24
25
3
6
SDATA
SCLK
VSS_IREF
VDD_A
VSS_A
VDD_CPU
VSS_CPU
VDD_SRC
VSS_SRC
VDD_48
VSS_48
VDD_PCI
VSS_PCI
VDD_3V66
VSS_3V66
VDD_REF
VSS_REF
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相關代理商/技術參數(shù) |
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| CY28409_06 | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:Clock Synthesizer with Differential SRC and CPU Outputs |
| CY28409AZXC | 功能描述:時鐘發(fā)生器及支持產品 SysClk Intel Grntsdl 865 and 875 chipsets 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 安裝風格:SMD/SMT 封裝 / 箱體:QFN-56 |
| CY28409AZXCT | 功能描述:時鐘發(fā)生器及支持產品 SysClk Intel Grntsdl 865 and 875 chipsets 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 安裝風格:SMD/SMT 封裝 / 箱體:QFN-56 |
| CY28409OC | 功能描述:時鐘合成器/抖動清除器 SysClk Intel Grntsdl 865 and 875 chipsets RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel |
| CY28409OCT | 功能描述:時鐘合成器/抖動清除器 SysClk Intel Grntsdl 865 and 875 chipsets RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel |
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