- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄358887 > LMX2372TM (NATIONAL SEMICONDUCTOR CORP) PLLatinum⑩ Dual Frequency Synthesizer for RF Personal Communications PDF資料下載
參數(shù)資料
| 型號： | LMX2372TM |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | XO, clock |
| 英文描述： | PLLatinum⑩ Dual Frequency Synthesizer for RF Personal Communications |
| 中文描述： | PLL FREQUENCY SYNTHESIZER, 1200 MHz, PDSO20 |
| 封裝： | PLASTIC, TSSOP-20 |
| 文件頁數(shù)： | 7/16頁 |
| 文件大?。?/td> | 217K |
| 代理商： | LMX2372TM |
1.0 Functional Description
(Continued)
The reference oscillator input block is powered down when both Main_PWDN and Aux_PWDN bits are asserted. The OSC
pin
reverts to a high impedance state when this condition exists. Power down forces the respective charge pump and phase com-
parator logic to a TRI-STATE condition. During the power down condition, both N- and R-counters are held at reset. Upon pow-
ering up, the N-counter resumes counting in “close” alignment with the R-counter. The maximum error is at most one prescaler
cycle. The MICROWIRE interface remains active and it is capable of loading and latching in data during all of the power down
modes.
2.0 Programming Description
2.1 MICROWIRE INTERFACE
The LMX237X register set can be accessed through the MICROWIRE interface.A22-bit shift register is used as a temporary reg-
ister to indirectly program the on-chip registers. The shift register consists of a 20-bit DATA[19:0] field and a 2-bit ADDRESS[1:0]
field as shown below. The address field is used to decode the internal register address. Data is clocked into the shift register in
the direction from MSB to LSB, when the CLOCK signal goes high. On the rising edge of Load Enable (LE) signal, data stored
in the shift register is loaded into the addressed latch.
MSB
LSB
DATA[19:0]
ADDRESS[1:0]
21
2
1
0
2.1.1 Registers’ Address Map
When Load Enable (LE) is transitioned high, data is transferred from the 22-bit shift register into the appropriate latch depending
on the state of the ADDRESS[1:0] bits. A multiplexing circuit decodes these address bits and writes the data field to the corre-
sponding internal register.
ADDRESS[1:0]
FIELD
0
0
1
1
REGISTER
ADDRESSED
Aux_R Register
Aux_N Register
Main_R Register
Main_N Register
0
1
0
1
www.national.com
7
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LMX2377UTMX | PLLatinum⑩ Ultra Low Power Dual Frequency Synthesizer for RF Personal Communications |
| LMX2377UTM | Enclosed Switches Series LS: Side Rotary with 1.5" to 3.5" Adjustable Length Lever; Nylon Roller; 1NC 1NO SPDT Snap Action, Double Break; 0.5 in - 14NPT conduit; Plug-in |
| LMX2377USLBX | PLLatinum⑩ Ultra Low Power Dual Frequency Synthesizer for RF Personal Communications |
| LMX2377USLEX | POSITIONER |
| LMX2377U | PLLatinum⑩ Ultra Low Power Dual Frequency Synthesizer for RF Personal Communications |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LMX2372TMX | 功能描述:IC FREQ SYNTH DUAL 20-TSSOP RoHS:是 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(yīng)商設(shè)備封裝:* 包裝:* |
| LMX2377U | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum⑩ Ultra Low Power Dual Frequency Synthesizer for RF Personal Communications |
| LMX2377U WAF | 制造商:Texas Instruments 功能描述: |
| LMX2377USLBX | 功能描述:IC FREQ SYNTH DUAL 24LAMINATECSP 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(yīng)商設(shè)備封裝:* 包裝:* |
| LMX2377USLEX | 功能描述:IC FREQ SYNTH DUAL 20LAMUCSP 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(yīng)商設(shè)備封裝:* 包裝:* |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。