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參數(shù)資料
| 型號： | CY28378OXC |
| 廠商： | Silicon Laboratories Inc |
| 文件頁數(shù)： | 4/21頁 |
| 文件大小： | 0K |
| 描述： | IC CLOCK CK408/TITAN 845 48SSOP |
| 標(biāo)準(zhǔn)包裝： | 30 |
| 類型： | 時鐘/頻率發(fā)生器 |
| PLL： | 是 |
| 主要目的： | Intel CPU 服務(wù)器 |
| 輸入： | 晶體 |
| 輸出： | HCSL，LVCMOS |
| 電路數(shù)： | 1 |
| 比率 - 輸入:輸出： | 1:21 |
| 差分 - 輸入:輸出： | 無/是 |
| 頻率 - 最大： | 203MHz |
| 電源電壓： | 3.135 V ~ 3.465 V |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 48-BSSOP（0.295"，7.50mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 48-SSOP |
| 包裝： | 管件 |
CY28378
...................... Document #: 38-07519 Rev. ** Page 12 of 21
PD# (Power-down) Clarification
The PD# (Power Down) pin is used to shut off ALL clocks prior
to shutting off power to the device. PD# is an asynchronous
active LOW input. This signal is synchronized internally to the
device powering down the clock synthesizer. PD# is an
asynchronous function for powering up the system. When PD#
is low, all clocks are driven to a LOW value and held there and
the VCO and PLLs are also powered down. All clocks are shut
down in a synchronous manner so has not to cause glitches
while transitioning to the low “stopped” state.
PD# – Assertion
Table 7. Maximum Lumped Capacitive Output Loads
Clock
Max Load
Units
PCI, PCI_F
20
pF
3V66
30
pF
48M_24MHz, 48MHz
20
pF
REF
30
pF
CPUT/C
CPU_ITP
See Figure 4
pF
Table 8. Group Timing Relationship and Tolerances
Offset
Tolerance
(or Range)
Conditions
Notes
3V66 to PCI
Typical 2.5 ns
1.5 – 3.5 ns
3V66 leads
See Note 2
PWRDWN#
AGP, 66MHz
USB, 48MHz
PCI, 33MHz
REF, 14.131818
CPUC, 133MHz
CPUT, 133MHz
Figure 2. Power-down Assertion Timing Waveforms
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CY28378OXCT | 功能描述:時鐘發(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: |
| CY28381OCT | 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 |
| CY28400 | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:100-MHz Differential Buffer for PCI Express and SATA |
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