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參數(shù)資料
| 型號： | MB15F78SP |
| 廠商： | Fujitsu Limited |
| 英文描述： | Dual Serial Input PLL Frequency Synthesizer |
| 中文描述： | 雙串行輸入鎖相環(huán)頻率合成器 |
| 文件頁數(shù)： | 11/27頁 |
| 文件大小： | 296K |
| 代理商： | MB15F78SP |
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MB15F78SP
11
3.
Power Saving Mode (Intermittent Mode Control Circut)
The intermittent mode control circuit reduces the PLL power consumption.
By setting the PS pins low, the device enters into the power saving mode, reducing the current consumption.
See the Electrical Characteristics chart for the specific value.
The phase detector output, Do, becomes high impedance.
For the dual PLL, the lock detector, LD, is as shown in the LD Output Logic table.
Setting the PS pins high, releases the power saving mode, and the device works normally.
The intermittent mode control circuit also ensures a smooth startup when the device returns to normal operation.
When the PLL is returned to normal operation, the phase comparator output signal is unpredictable. This is
because of the unknown relationship between the comparison frequency (fp) and the reference frequency (fr)
which can cause a major change in the comparator output, resulting in a VCO frequency jump and an increase
in lockup time.
To prevent a major VCO frequency jump, the intermittent mode control circuit limits the magnitude of the error
signal from the phase detector when it returns to normal operation.
Notes:
When power (V
CC
) is first applied, the device must be in standby mode, PS
TX
= PS
RX
= Low, for at least 1
μ
s.
PS pins must be set at “L” for Power-ON
Status
PS
TX
/PS
RX
pins
Normal mode
H
Power saving mode
L
ON
OFF
V
CC
Clock
Data
LE
PS
TX
PS
RX
(1)
(2)
(3)
t
V
≥
1
μ
s
t
PS
≥
100 ns
(1) PS
TX
= PS
RX
= “L” (power saving mode) at Power-ON
(2) Set serial data 1
μ
s later after power supply remains stable (V
CC
>
2.2 V).
(3) Release power saving mode (PS
TX
, PS
RX
: “L”
→
“H”) 100 ns later after setting serial data.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MB15F78SPPFT | Dual Serial Input PLL Frequency Synthesizer |
| MB15F78SPPV | Dual Serial Input PLL Frequency Synthesizer |
| MB15F78UL | Dual Serial Input PLL Frequency Synthesizer |
| MB15F78ULPFT | Dual Serial Input PLL Frequency Synthesizer |
| MB15F78ULPVA | Dual Serial Input PLL Frequency Synthesizer |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MB15F78SPPFT | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:Dual Serial Input PLL Frequency Synthesizer |
| MB15F78SPPV | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:Dual Serial Input PLL Frequency Synthesizer |
| MB15F78UL | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:Dual Serial Input PLL Frequency Synthesizer |
| MB15F78ULPFT | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:Dual Serial Input PLL Frequency Synthesizer |
| MB15F78ULPFT-G-BND-EFE1 | 功能描述:IC SYNTHESIZR PLL DL INP 20TSSOP RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(fā)生器，PLL，頻率合成器 系列:- 標(biāo)準(zhǔn)包裝:2,000 系列:- 類型:PLL 頻率合成器 PLL:是 輸入:晶體 輸出:時鐘 電路數(shù):1 比率 - 輸入:輸出:1:1 差分 - 輸入:輸出:無/無 頻率 - 最大:1GHz 除法器/乘法器:是/無 電源電壓:4.5 V ~ 5.5 V 工作溫度:-20°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-LSSOP（0.175"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-SSOP 包裝:帶卷 (TR) 其它名稱:NJW1504V-TE1-NDNJW1504V-TE1TR |
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