參數(shù)資料
型號: LMX2487ESQX
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: XO, clock
英文描述: 7.5 GHz High Performance Delta-Sigma Low Power Dual PLLatinum⑩ Frequency Synthesizers with 3.0 GHz Integer PLL
中文描述: PLL FREQUENCY SYNTHESIZER, 7500 MHz, PQCC24
封裝: 4 X 4 MM, 0.80 MM HEIGHT, LLP-24
文件頁數(shù): 28/38頁
文件大?。?/td> 419K
代理商: LMX2487ESQX
2.3 R2 REGISTER
REGISTER
R2
23
22
21
20
19
18
17
16
DATA[19:0]
IF_N[18:0]
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
C3
0
C2
1
C1
0
C0
1
IF_PD
2.3.1 IF_N[18:0] -- IF N Divider Value
IF_N Counter Programming with the 8/9 Prescaler (IF_P=0)
N Value
IF_N[18:0]
IF_B
IF_A
23
24-55
N values less than or equal to 23 are prohibited because IF_B
3 is required.
Legal divide ratios in this range are:
24-27, 32-36, 40-45, 48-54
0
0
0
0
0
0
0
0
0
0
0
0
0
0
.
.
.
.
.
.
.
1
1
1
1
1
1
1
56
57
...
0
0
.
1
0
0
.
1
0
0
.
1
0
0
.
1
0
0
.
1
1
1
.
1
1
1
.
1
1
1
.
1
0
0
.
0
0
0
.
1
0
0
.
1
0
1
.
1
262143
Operation with the 16/17 Prescaler (IF_P=1)
N Value
IF_B
IF_A
47
48-239
N values less than or equal to 47 are prohibited because IF_B
3 is required.
Legal divide ratios in this range are:
48-51, 64-68, 80-85, 96-102, 112-119, 128-136, 144-153, 160-170, 176-187, 192-204, 208-221, 224-238
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
.
.
.
.
.
.
.
.
.
1
1
1
1
1
1
1
1
1
240
241
...
0
0
.
1
0
0
.
1
1
1
.
1
1
1
.
1
1
1
.
1
1
1
.
1
0
0
.
1
0
0
.
1
0
0
.
1
0
1
.
1
524287
2.3.4 IF_PD -- IF Power Down Bit
When this bit is set to 0, the IF PLL operates normally. When it is set to 1, the IF PLL powers down and the output of the IF PLL
charge pump is set to a TRI-STATE mode. If the ATPU bit is set and register R0 is written to, the IF_PD will be reset to 0 and the
IF PLL will be powered up. If the CE pin is held low, the IF PLL will be powered down, overriding the IF_PD bit.
www.national.com
28
L
相關(guān)PDF資料
PDF描述
LMX2515 PLLatinum⑩ Frequency Synthesizer System with Integrated VCO
LMX2515LQ0701 PLLatinum⑩ Frequency Synthesizer System with Integrated VCO
LMX2515LQ1321 PLLatinum⑩ Frequency Synthesizer System with Integrated VCO
LMX2515LQX0701 PLLatinum⑩ Frequency Synthesizer System with Integrated VCO
LMX2515LQX1321 PLLatinum⑩ Frequency Synthesizer System with Integrated VCO
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LMX2487ESQX/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
LMX2487SQ 制造商:NSC 制造商全稱:National Semiconductor 功能描述:3.0 GHz - 6.0 GHz High Performance Delta-Sigma Low Power Dual PLLatinum? Frequency Synthesizers with 3.0 GHz Integer PLL
LMX2487SQ/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
LMX2487SQX 制造商:NSC 制造商全稱:National Semiconductor 功能描述:3.0 GHz - 6.0 GHz High Performance Delta-Sigma Low Power Dual PLLatinum? Frequency Synthesizers with 3.0 GHz Integer PLL
LMX2487SQX/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