參數(shù)資料
型號(hào)： LMX2531LQ1500E
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： XO, clock
英文描述： High Performance Frequency Synthesizer System with Integrated VCO
中文描述： PLL FREQUENCY SYNTHESIZER, 80 MHz, QCC36
封裝： 6 X 6 MM, 0.80 MM HEIGHT, LEAD FREE, LLP-36
文件頁(yè)數(shù)： 18/23頁(yè)
文件大?。?/td> 561K
代理商： LMX2531LQ1500E
2.0 General Programming Information
(Continued)
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
0
1
2
3
4
.
16383
FLout Pin State
High Impedance
Low
Low
High
Low
.
Low
Timeout Count
0
Always Enabled
0
0
4 X 2 Phase Detector
.
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
Steady State
Fastlock
FLout
Charge Pump Current
ICP
ICPFL
R3
R4
High Impedance
Grounded
R3_ADJ
R3_ADJ_FL
R4_ADJ
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
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Fastlock Charge Pump State
1X
2X
3X
4X
5X
6X
7X
8X
9X
10X
11X
12X
13X
14X
15X
16X
Typical Fastlock Charge Pump Current at 3 Volts (μA)
90
180
270
360
450
540
630
720
810
900
990
1080
1170
1260
1350
1440
L
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LMX2531LQ1500E/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(shù)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
LMX2531LQ1500E_08 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High Performance Frequency Synthesizer System with Integrated VCO
LMX2531LQ1500EX 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High Performance Frequency Synthesizer System with Integrated VCO
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(shù)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
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