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參數(shù)資料
| 型號(hào)： | CY28378OC |
| 廠商： | CYPRESS SEMICONDUCTOR CORP |
| 元件分類： | XO, clock |
| 英文描述： | FTG for Pentium 4 and Intel 845 Series Chipset |
| 中文描述： | 200.4 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
| 封裝： | SSOP-48 |
| 文件頁數(shù)： | 3/22頁 |
| 文件大小： | 174K |
| 代理商： | CY28378OC |
CY28378
Document #: 38-07519 Rev. **
Page 3 of 22
23
24_48MHz/FS1
I/O
24 or 48MHz Output/Frequency Select 1:
3.3V fixed 24-MHz or
48-MHz non-spread spectrum output. This pin also serves as a
power-on strap option to determine device operating frequency as
described in
Table 2
. This output will be used as the reference clock
for SIO devices in Intel 845 (Brookdale) platforms. For Intel
Brookdale
– G platforms, this output will be used as the reference clock for both
USB host controller and SIO devices. We recommend system designer
to configure this output as 48 MHz and “HIGH Drive” by setting Byte
[5], Bit [0] and Byte [9], Bit [7], respectively.150k internal pull up.
48MHz or 66MHz Output:
3.3V output.
Power Down Control:
3.3V LVTTL compatible input that places the
device in power down mode when held low. 150k internal pull up.
SMBus Clock Input:
Clock pin for serial interface.
SMBus Data Input:
Data pin for serial interface.
O (open-drain)
System Reset Output:
Open-drain system reset output.
I
Current Reference for CPU Output:
A precision resistor is attached
to this pin which is connected to the internal current reference.
I
Powergood from Voltage Regulator Module (VRM):
3.3V LVTTL
input. VTT_PWRGD# is a level sensitive strobe used to determine
when FS0:4 and MULTSEL0:1 inputs are valid and OK to be sampled
(Active LOW). Once VTT_PWRGD# is sampled LOW, the status of this
input will be ignored.
P
3.3V Power Connection:
Power supply for CPU outputs buffers, 3V66
output buffers, PCI output buffers, reference output buffers and
48-MHz output buffers. Connect to 3.3V.
27
42
3V66_3/48MHz_1
PWRDWN#
O
I
26
25
20
35
SCLK
SDATA
RESET#
IREF
I
I/O
19
VTT_PWRGD#
2, 9, 18, 24, 32, 39,
46
VDD_REF,
VDD _PCI,
VDD_48MHz,
VDD_3V66,
VDD_CPU
GND_PCI,
GND_48MHz,
GND_3V66,
GND_CPU,
GND_REF,
VDD_CORE
5, 13, 21, 29, 36,
43, 47
G
Ground Connection:
Connect all ground pins to the common system
ground plane.
34
P
3.3V Analog Power Connection:
Power supply for core logic, PLL
circuitry. Connect to 3.3V.
Analog Ground Connection:
Ground for core logic, PLL circuitry.
33
GND_CORE
G
Pin Description
Pin #
Name
Type
Description
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| CY28378OCT | FTG for Pentium 4 and Intel 845 Series Chipset |
| CY28400 | 100-MHz Differential Buffer for PCI Express and SATA |
| CY28400OC | 100-MHz Differential Buffer for PCI Express and SATA |
| CY28400OCT | 100-MHz Differential Buffer for PCI Express and SATA |
| CY28401 | 100-MHz Differential Buffer for PCI Express and SATA |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CY28378OCT | 制造商:SPECTRALINEAR 制造商全稱:SPECTRALINEAR 功能描述:FTG for Pentium 4㈢ and Intel㈢ 845 Series Chipset |
| CY28378OXC | 功能描述:時(shí)鐘發(fā)生器及支持產(chǎn)品 Sys Clk Pentium 4 & Intel Brookdale 845 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 |
| CY28378OXCT | 功能描述:時(shí)鐘發(fā)生器及支持產(chǎn)品 Sys Clk Pentium 4 & Intel Brookdale 845 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 |
| CY28381 | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:High-Performance SiS645DX/648DX/650/651 Intel Pentium 4 Clock Synthesizer |
| CY28381OC | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Cypress Semiconductor 功能描述: |
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