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参数资料
| 型号： | CY22391 |
| 厂商： | Cypress Semiconductor Corp. |
| 英文描述： | Factory Programmable Quad PLL Clock Generator with VCXO(带VCXO的可编程方形PLL时钟发生器) |
| 中文描述： | 四工厂可编程锁相环时钟发生器，石英振荡器（带石英振荡器的可编程方形锁相环时钟发生器） |
| 文件页数： | 3/10页 |
| 文件大小： | 552K |
| 代理商： | CY22391 |
CY22388/89/91
Document #: 38-07734 Rev. *B
Page 3 of 10
CLKC
frequencies come from the same PLL but can have different
divider values.
In order to minimize PPM (Parts Per Million) error on the clock
outputs, a user should choose a crystal reference frequency
that is a common multiple of the desired PLL frequencies.
While this would be the ideal situation, this is not always the
case and the PLLs have high-resolution counters internally to
help minimize frequency deviation from the desired frequency.
and
CLKE
have
related
frequencies.
Related
PLL VCO frequencies are generated by the following
equation: F
VCO
= F
REF
* (P / Q)
Where F
REF
is the reference input frequency, P is the PLL
feedback divider and Q is the reference input divider.
A PLL is a feedback system where the VCO frequency divided
by P and reference frequency divided by Q are constantly
beingcomparedandtheVCOfrequencyisadjustedto achieve
a locked state.
Figure 1
is a simplified drawing of a PLL.
Figure 1.
Frequency Select Pin Operation
F
R E F
/ Q
V C O
a n d
O t h e r
c o m p o n e n t s
/ P
F
V C O
Table 1. CY22388 16-pin TSSOP
Output Signal
Frequency Selection
Lines
S2S1S0
S1S0
S0
FIXED
CLOCK A
CLOCK B
CLOCK C & CLOCK D
CLOCK E
Table 2. CY22389 20-pin TSSOP
Output Signal
Frequency Selection
Lines
S2S1S0
S1S0
CLOCK A
CLOCK B & CLOCK C
CLOCK D, CLOCK E, & CLOCK F S0
CLOCK G
CLOCK H
FIXED
COPY OF CLOCK D
Table 3. CY22391 32-pin QFN
Output Signal
Frequency Selection
Lines
S2S1S0
S1S0
CLOCK A
CLOCK B & CLOCK C
CLOCK D, CLOCK E, & CLOCK F S0
CLOCK G
CLOCK H
FIXED
COPY OF CLOCK D
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相关代理商/技术参数 |
参数描述 |
|---|---|
| CY22391KLTFXC | 制造商:Cypress Semiconductor 功能描述: |
| CY22391KLTXC-01 | 功能描述:时钟发生器及支持产品 Factory Program Quad PLL Clk Gen w/VCXO RoHS:否 制造商:Silicon Labs 类型:Clock Generators 最大输入频率:14.318 MHz 最大输出频率:166 MHz 输出端数量:16 占空比 - 最大:55 % 工作电源电压:3.3 V 工作电源电流:1 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-56 |
| CY22391KLTXC-01KG | 制造商:Cypress Semiconductor 功能描述: |
| CY22391KLTXC-01T | 功能描述:时钟发生器及支持产品 Factory Program Quad PLL Clk Gen w/VCXO RoHS:否 制造商:Silicon Labs 类型:Clock Generators 最大输入频率:14.318 MHz 最大输出频率:166 MHz 输出端数量:16 占空比 - 最大:55 % 工作电源电压:3.3 V 工作电源电流:1 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-56 |
| CY22391KLTXC-02 | 功能描述:时钟发生器及支持产品 Factory Program Quad PLL Clk Gen w/VCXO RoHS:否 制造商:Silicon Labs 类型:Clock Generators 最大输入频率:14.318 MHz 最大输出频率:166 MHz 输出端数量:16 占空比 - 最大:55 % 工作电源电压:3.3 V 工作电源电流:1 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-56 |
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