- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄384604 > LMX2335 (National Semiconductor Corporation) PLLatinum Dual Frequency Synthesizer for RF Personal Communications(PLLatinum技術(shù)用于射頻個人通訊的雙通道頻率合成器) PDF資料下載
參數(shù)資料
| 型號： | LMX2335 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | PLLatinum Dual Frequency Synthesizer for RF Personal Communications(PLLatinum技術(shù)用于射頻個人通訊的雙通道頻率合成器) |
| 中文描述： | PLLatinum雙頻率合成射頻個人通信（PLLatinum技術(shù)用于射頻個人通訊的雙通道頻率合成器） |
| 文件頁數(shù)： | 9/17頁 |
| 文件大?。?/td> | 392K |
| 代理商： | LMX2335 |
Functional Description
(Continued)
PROGRAMMABLE DIVIDER (N COUNTER)
Each N counter consists of the 7-bit swallow counter (A counter) and the 11-bit programmable counter (B counter). If the Control
Bits are 10 or 11 (10 for RF2 counter and 11 for RF1 counter) data is transferred from the 20-bit shift register into a 7-bit latch
(which sets the Swallow (A) Counter) and an 11-bit latch (which sets the 11-bit programmable (B) Counter), MSB first. Serial data
format is shown below.
7-BIT SWALLOW COUNTER DIVIDE RATIO (A COUNTER)
Divide
Ratio
A
0
1
127
N
7
N
6
N
5
N
4
N
3
N
2
N
1
0
0
1
0
0
1
0
0
1
0
0
1
0
0
1
0
0
1
0
1
1
Notes:
Divide ratio: 0 to 127
B
≥
A
A
<
P
11-BIT PROGRAMMABLE COUNTER DIVIDE RATIO (B COUNTER)
Divide
Ratio
B
3
4
2047
N
18
N
17
N
16
N
15
N
14
N
13
N
12
N
11
N
10
N
9
N
8
0
0
1
0
0
1
0
0
1
0
0
1
0
0
1
0
0
1
0
0
1
0
0
1
0
1
1
1
0
1
1
0
1
Notes:
Divide ratio: 3 to 2047 (Divide ratios less than 3 are prohibited)
B
≥
A
PULSE SWALLOW FUNCTION
f
VCO
= [(P x B) + A] x f
OSC
/R
f
VCO
:
Output frequency of external voltage controlled oscillator (VCO)
B:
Preset divide ratio of binary 11-bit programmable counter (3 to 2047)
A:
Preset divide ratio of binary 7-bit swallow counter
(0
≤
A
≤
P; A
≤
B)
f
OSC
:
Output frequency of the external reference frequency oscillator
R:
Preset divide ratio of binary 15-bit programmable reference counter (3 to 32767)
P:
Preset modulus of dual moduIus prescaler (P = 64 or 128)
PROGRAMMABLE MODES
Several modes of operation can be programmed with bits R16–R20 including the phase detector polarity, charge pump tristate
and the output of the F
LD pin. The prescaler and power down modes are selected with bits N19 and N20. The programmable
modes are shown in Table 1 Truth table for the programmable modes and F
o
LD output are shown in Tables 2, 3
DS012332-5
L
www.national.com
9
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LMX2337 | PLLatinum Dual Frequency Synthesizer for RF Personal Communications(PLLatinum技術(shù)用于射頻個人通訊的雙通道頻率合成器) |
| LMX2350 | PLLatinum Fractional Dual Low Power Frequency Synthesizer(PLLatinum技術(shù)低耗雙通道頻率合成器) |
| LMX2352 | PLLatinum Fractional Dual Low Power Frequency Synthesizer(PLLatinum技術(shù)低耗雙通道頻率合成器) |
| LMX2350TM | PLLatinum⑩ Fractional N RF / Integer N IF Dual Low Power Frequency Synthesizer |
| LMX2352TM | CAP,CER,DISC,RAD,100PF,10%,1KV |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LMX2335 WAF | 制造商:Texas Instruments 功能描述: |
| LMX2335L | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:無線通訊 |
| LMX2335LM | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| LMX2335LSLB | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum⑩ Low Power Dual Frequency Synthesizer for RF Personal Communications |
| LMX2335LSLBX | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:FREQUENCY SYNTHESIZER|BICMOS|LLCC|16PIN|PLASTIC |
發(fā)布緊急采購，3分鐘左右您將得到回復。