- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄44574 > LMX2370SLDX (NATIONAL SEMICONDUCTOR CORP) PLL FREQUENCY SYNTHESIZER, 2500 MHz, QCC24 PDF資料下載
參數(shù)資料
| 型號： | LMX2370SLDX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | PLL合成/DDS/VCOs |
| 英文描述： | PLL FREQUENCY SYNTHESIZER, 2500 MHz, QCC24 |
| 封裝： | 3.50 X 4.50 MM, 0.8 MM HEIGHT, TCSP-24 |
| 文件頁數(shù)： | 9/25頁 |
| 文件大?。?/td> | 577K |
| 代理商： | LMX2370SLDX |
2.0 Programming Description (Continued)
2.3.7 Power Down Mode Table
Main PLL
Auxiliary PLL
Main
Counters
Auxiliary
Counters
OSC
in Buffer
Active
ON
Active
Powered Down
ON
OFF
ON
Powered Down
Active
OFF
ON
Powered Down
OFF
2.4 PROGRAMMABLE MODES
Several modes of operation can be programmed with bits R15–R19 including the phase detector polarity, charge pump
magnitude, charge pump TRI-STATE and the output of the Fo/LD pin. The programmable modes are shown in Table 1. Truth table
for the programmable modes and Fo/LD output are shown in Table 2 and Table 3.
2.4.1 Programmable Modes Table
R19
R18
R17
R16
R15
Address[1:0]
f
OUT/Lock Detect
Charge
Pump
TRI-STATE
Charge
Pump
Magnitude
Phase
Detector
Polarity
FoLD 1
FoLD 0
Aux_CP
o_TRI
Aux_CP
o_4X
Aux_PD_POL
0 0
FoLD 3
FoLD 2
Main_CP
o_TRI
Main_CP
o_4X
Main_PD_POL
1 0
2.4.2 Mode Select Truth Table
CP
o_TRI (Note 6)
CP
o_4X (Note 7)
PD_POL (Note 8)
0
Normal Operation
1X Current
LOW
1
TRI-STATE
4X Current
HIGH
Note 6: Both synchronous and asynchronous power down modes are available with the LMX237x family to be able to adapt to different types of applications. The
MICROWIRE control register remains active and capable of loading and latching in data during all of the powerdown modes.
Note 7: ICPo (charge pump current magnitude) is dependent on Vp. The ICPo LOW current state = 1/4 x ICPo HIGH current.
Note 8: See Section 2.4.3
2.4.3 Phase Detector Polarity (Aux_PD_POL, Main_PD_POL)
Depending upon VCO characteristics, the Aux_PD_POL (Aux_R15) and Main_PD_POL (Main_R15) bits should be set accord-
ingly:
When VCO characteristics are positive like (1), R15 should be set HIGH;
When VCO characteristics are negative like (2), R15 should be set LOW.
VCO CHARACTERISTICS
10102605
LMX2370
www.national.com
17
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LMX2370TMX/NOPB | PLL FREQUENCY SYNTHESIZER, 2500 MHz, PDSO20 |
| LMX2370TM/NOPB | PLL FREQUENCY SYNTHESIZER, 2500 MHz, PDSO20 |
| LMX2512LQX0967/NOPB | PLL FREQUENCY SYNTHESIZER, 19.68 MHz, QCC28 |
| LMX2515LQX0701/NOPB | PLL FREQUENCY SYNTHESIZER, 26 MHz, QCC28 |
| LMX2525LQ1321/NOPB | PLL FREQUENCY SYNTHESIZER, 26 MHz, QCC24 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LMX2370TM | 功能描述:IC FREQ SYNTH DL 2.5GHZ 20TSSOP RoHS:否 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:PLLatinum™ 標準包裝:39 系列:- 類型:* PLL:帶旁路 輸入:時鐘 輸出:時鐘 電路數(shù):1 比率 - 輸入:輸出:1:10 差分 - 輸入:輸出:是/是 頻率 - 最大:170MHz 除法器/乘法器:無/無 電源電壓:2.375 V ~ 3.465 V 工作溫度:0°C ~ 70°C 安裝類型:* 封裝/外殼:* 供應商設(shè)備封裝:* 包裝:* |
| LMX2370TMX | 功能描述:IC FREQ SYNTH DL 2.5GHZ 20-TSSOP RoHS:否 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:PLLatinum™ 標準包裝:39 系列:- 類型:* PLL:帶旁路 輸入:時鐘 輸出:時鐘 電路數(shù):1 比率 - 輸入:輸出:1:10 差分 - 輸入:輸出:是/是 頻率 - 最大:170MHz 除法器/乘法器:無/無 電源電壓:2.375 V ~ 3.465 V 工作溫度:0°C ~ 70°C 安裝類型:* 封裝/外殼:* 供應商設(shè)備封裝:* 包裝:* |
| LMX2370TMX/NOPB | 制造商:Texas Instruments 功能描述:PLL Frequency Synthesizer Dual 45MHz to 2500MHz 20-Pin TSSOP T/R |
| LMX2371 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| LMX2371 WAF | 制造商:Texas Instruments 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復。