- 您現在的位置：買賣IC網 > PDF目錄361044 > LMX2433TMX (NATIONAL SEMICONDUCTOR CORP) PLLatinum Dual High Frequency Synthesizer for RF Personal Communications PDF資料下載
參數資料
| 型號： | LMX2433TMX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | XO, clock |
| 英文描述： | PLLatinum Dual High Frequency Synthesizer for RF Personal Communications |
| 中文描述： | PLL FREQUENCY SYNTHESIZER, 3600 MHz, PDSO20 |
| 封裝： | PLASTIC, TSSOP-20 |
| 文件頁數： | 44/49頁 |
| 文件大小： | 943K |
| 代理商： | LMX2433TMX |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁當前第44頁第45頁第46頁第47頁第48頁第49頁
2.0 Programming Description
(Continued)
2.7.3 IF_CPG - IF Synthesizer Charge Pump Current Gain (R3[19])
The IF_CPG bit controls the IF synthesizer’s charge pump gain. Two gain levels are available.
Control Bit
Register Location
Description
Function
0
1
IF_CPG
R3[19]
IF Charge Pump
Current Gain
LOW
1 mA
HIGH
4 mA
2.7.4 IF_CPT - IF Synthesizer Charge Pump TRI-STATE (R3[20])
The IF_CPT bit allows the charge pump to be switched between a normal operating mode and a high impedance output state.
This happens asynchronously with the change in the IF_CPT bit.
Furthermore, the IF_CPT bit operates in conjuction with the IF_PD bit to set a synchronous or an asynchronous powerdown
mode. Refer to
Section 2.8.4
for more details on how to program the IF_PD bit.
Control Bit
Register Location
Description
Function
0
1
IF_CPT
R3[20]
IF Charge Pump
TRI-STATE
IF Charge Pump
Normal Operation
IF Charge Pump
Output in High
Impedance State
2.7.5 IF_RST - IF Synthesizer Counter Reset (R3[21])
The IF_RST bit resets of the IF_A, IF_B and IF_R counters. After removing the reset, the IF_A and IF_B counters resume
counting in close alignment with the IF_R counter. The maximum error is one prescaler cycle.
Control Bit
Register Location
Description
Function
0
1
IF_RST
R3[21]
IF Counter Reset
IF_A, IF_B and IF_R
Normal Operation
IF_A, IF_B and IF_R
Reset
2.8 R4 REGISTER
The R4 register contains the IF_A, IF_B, IF_P, and IF_PD control words. The IF_A and IF_B control words are used to setup the
programmable feedback divider. The detailed descriptions and programming information for each control word is discussed in the
following sections. R4[21] is always set to 0.
Reg
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
DATA[20:0] FIELD
ADDRESS
[2:0]
FIELD
R4
IF_
PD
IF_
P
0
IF_B[13:0]
IF_A[3:0]
1
0
0
2.8.1 IF_A[3:0] - IF Synthesizer Swallow Counter (A Counter) (R4[6:3])
The IF_A control word is used to setup the IF synthesizer’s A counter. The A counter is a 4-bit swallow counter used in the
programmable feedback divider. The IF_A control word can be programmed to values ranging from 0 to 15.
Divide Ratio
IF_A[3:0]
3
0
0
1
2
0
0
1
1
0
0
1
0
0
1
1
0
1
15
L
www.national.com
44
相關PDF資料 |
PDF描述 |
|---|---|
| LMX2434 | PLLatinum Dual High Frequency Synthesizer for RF Personal Communications |
| LMX2434TM | PLLatinum Dual High Frequency Synthesizer for RF Personal Communications |
| LMX2434TMX | PLLatinum Dual High Frequency Synthesizer for RF Personal Communications |
| LMX2430SLEX | PLLatinum Dual High Frequency Synthesizer for RF Personal Communications |
| LMX2430TM | PLLatinum Dual High Frequency Synthesizer for RF Personal Communications |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LMX2433TMX/NOPB | 功能描述:鎖相環 - 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 |
| LMX2434 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum Dual High Frequency Synthesizer for RF Personal Communications |
| LMX2434EVAL | 功能描述:時鐘和定時器開發工具 LMX2434 EVAL BOARD RoHS:否 制造商:Texas Instruments 產品:Evaluation Modules 類型:Clock Conditioners 工具用于評估:LMK04100B 頻率:122.8 MHz 工作電源電壓:3.3 V |
| LMX2434EVAL/NOPB | 功能描述:時鐘和定時器開發工具 LMX2434 EVAL BOARD RoHS:否 制造商:Texas Instruments 產品:Evaluation Modules 類型:Clock Conditioners 工具用于評估:LMK04100B 頻率:122.8 MHz 工作電源電壓:3.3 V |
| LMX2434SLEX | 制造商:Texas Instruments 功能描述:PLL Frequency Synthesizer Dual 500MHz to 5000MHz 20-Pin LAM UCSP T/R |
發布緊急采購，3分鐘左右您將得到回復。