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参数资料
| 型号： | LC72133V |
| 元件分类： | PLL合成/DDS/VCOs |
| 英文描述： | PLL FREQUENCY SYNTHESIZER, 40 MHz, PDSO20 |
| 封装： | SSOP-20 |
| 文件页数： | 10/23页 |
| 文件大小： | 147K |
| 代理商： | LC72133V |
Unlock Detection Timing
1. Unlock Detection Determination Timing
Unlocked state detection is performed in the reference frequency (fref) period (interval). Therefore, in principle,
unlock determination requires a time longer than the period of the reference frequency. However, immediately after
changing the divisor N (frequency) unlock detection must be performed after waiting at least two periods of the
reference frequency.
Figure 1 Unlocked State Detection Timing
For example, if fref is 1 kHz, i.e., the period is 1 ms, after changing the divisor N, the system must wait at least 2 ms
before checking for the unlocked state.
Figure 2 Circuit Structure
No. 5427-18/23
LC72133M, 72133V
A11936
CE
DATA
LATCH
VCO/N
N-
counter
fref
÷R
÷N
DATA LATCH
VCO
Preset
fref
VCO/N
UNLOCK
L. P. F
A11937
ERROR
(unlock)
Old data
New data
Old divisor N
New divisor N'
The divisor N is not updated
in the first period.
Note: After changing the divisor, ERROR
is output after two fref periods.
Unlock
detection circuit
Phase comparator
ERROR
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LC72133V-TLM-E | 制造商:ON Semiconductor 功能描述:PLL FREQUENCY SYNTHESIZER - Tape and Reel |
| LC72134M | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:Dual PLL Frequency Synthesizer for FM Tuner Systems |
| LC72135M | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:PLL Frequency Synthesizer for Electronic Tuning |
| LC72135MA-AE | 功能描述:时钟合成器/抖动清除器 RoHS:否 制造商:Skyworks Solutions, Inc. 输出端数量: 输出电平: 最大输出频率: 输入电平: 最大输入频率:6.1 GHz 电源电压-最大:3.3 V 电源电压-最小:2.7 V 封装 / 箱体:TSSOP-28 封装:Reel |
| LC72135MA-Q-AE | 制造商:ON Semiconductor 功能描述:PLL FREQUENCY SYNTHESIZER - Tape and Reel 制造商:ON Semiconductor 功能描述:REEL / PLL FREQUENCY SYNTHESIZER |
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