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參數資料
| 型號： | LMX2531LQ1500EX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | PLL合成/DDS/VCOs |
| 英文描述： | PLL FREQUENCY SYNTHESIZER, 80 MHz, QCC36 |
| 封裝： | 6 X 6 MM, 0.8 MM, LCC-36 |
| 文件頁數： | 10/24頁 |
| 文件大?。?/td> | 458K |
| 代理商： | LMX2531LQ1500EX |
2.5 REGISTER R4
2.5.1 TOC[13:0] -- Time Out Counter for FastLock
When the value of this word is 3 or less, then FastLock is disabled, and this pin can only be used for general purpose I/O. When
this value is 4 or greater, the time out counter is engaged for the amount of phase detector cycles shown in the table below.
TOC Value
FLout Pin State
Timeout Count
0
High Impedance
0
1
Low
Always Enabled
2
Low
0
3
High
0
4
Low
4 X 2 Phase Detector
.
16383
Low
16383 X 2 Phase Detector
When this count is active, the FLout Pin is grounded, the FastLock current is engaged, and the resistors R3 and R4 are also
potentially changed. The table below summarizes the bits that control various values in and out of FastLock differences.
FastLock State
FLout
Charge Pump Current
R3
R4
Steady State
High Impedance
ICP
R3_ADJ
R4_ADJ
Fastlock
Grounded
ICPFL
R3_ADJ_FL
R4_ADJ_FL
2.5.2 ICPFL[3:0] -- Charge Pump Current for Fastlock
When FastLock is enabled, this is the charge pump current that is used for faster lock time.
ICPFL
Fastlock Charge Pump State
Typical Fastlock Charge Pump Current
at 3 Volts (A)
0
1X
90
1
2X
180
2
3X
270
3
4X
360
4
5X
450
5
6X
540
6
7X
630
7
8X
720
8
9X
810
9
10X
900
10
11X
990
11
12X
1080
12
13X
1170
13
14X
1260
14
15X
1350
15
16X
1440
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LMX2531LQ1500E
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相關代理商/技術參數 |
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| LMX2531LQ1515E | 制造商:Texas Instruments 功能描述:PLL Frequency Synthesizer Single 1450MHz to 1580MHz 36-Pin LLP EP T/R 制造商:Texas Instruments 功能描述:CLOCK SYNTHESIZER 1.6GHZ 36LLP |
| LMX2531LQ1515E/NOPB | 功能描述:鎖相環(huán) - PLL RoHS:否 制造商:Silicon Labs 類型:PLL Clock Multiplier 電路數量:1 最大輸入頻率:710 MHz 最小輸入頻率:0.002 MHz 輸出頻率范圍:0.002 MHz to 808 MHz 電源電壓-最大:3.63 V 電源電壓-最小:1.71 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:QFN-36 封裝:Tray |
| LMX2531LQ1570E | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum High Performance Frequency Synthesizer System with Integrated VCO |
| LMX2531LQ1570E/NOPB | 功能描述:鎖相環(huán) - PLL RoHS:否 制造商:Silicon Labs 類型:PLL Clock Multiplier 電路數量:1 最大輸入頻率:710 MHz 最小輸入頻率:0.002 MHz 輸出頻率范圍:0.002 MHz to 808 MHz 電源電壓-最大:3.63 V 電源電壓-最小:1.71 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:QFN-36 封裝:Tray |
| LMX2531LQ1650E | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High Performance Frequency Synthesizer System with Integrated VCO |
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