- 您现在的位置：买卖IC网 > PDF目录8804 > MC145151DW2 (Freescale Semiconductor)IC PAR-IN PLL FREQ SYNTH 28-SOIC PDF资料下载
参数资料
| 型号： | MC145151DW2 |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 15/24页 |
| 文件大小： | 0K |
| 描述： | IC PAR-IN PLL FREQ SYNTH 28-SOIC |
| 标准包装： | 26 |
| 类型： | PLL 时钟/频率合成器 |
| PLL： | 是 |
| 输入： | 时钟 |
| 输出： | CMOS |
| 电路数： | 1 |
| 比率 - 输入:输出： | 1:1 |
| 差分 - 输入:输出： | 无/无 |
| 频率 - 最大： | 25MHz |
| 除法器/乘法器： | 是/无 |
| 电源电压： | 3 V ~ 9 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 28-SOIC W |
| 包装： | 管件 |
MC145151-2 and MC145152-2 Technical Data, Rev. 5
22
Freescale Semiconductor
Design Considerations
For the maximum frequency into the prescaler (fVCOmax), the value used for P must be large enough such
that:
1. fVCOmax divided by P may not exceed the frequency capability of fin (input to the ÷ N and ÷ A
counters).
2. The period of fVCO divided by P must be greater than the sum of the times:
a) Propagation delay through the dual-modulus prescaler.
b) Prescaler setup or release time relative to its MC signal.
c) Propagation time from fin to the MC output for the frequency synthesizer device.
A sometimes useful simplification in the programming code can be achieved by choosing the values for P
of 8, 16, 32, or 64. For these cases, the desired value of NT results when NT in binary is used as the program
code to the
÷ N and ÷ A counters treated in the following manner:
1. Assume the
÷ A counter contains “a” bits where 2a ≥ P.
2. Always program all higher order
÷ A counter bits above “a” to 0.
3. Assume the
÷ N counter and the ÷ A counter (with all the higher order bits above “a” ignored)
combined into a single binary counter of n + a bits in length (n = number of divider stages in the
÷ N counter). The MSB of this “hypothetical” counter is to correspond to the MSB of ÷ N and the
LSB is to correspond to the LSB of
÷ A. The system divide value, N
T, now results when the value
of NT in binary is used to program the “new” n + a bit counter.
By using the two devices, several dual-modulus values are achievable.
相关PDF资料 |
PDF描述 |
|---|---|
| CS3108A-40-62S | CONN PLUG 60POS RT ANG W/SCKT |
| CS3102A-20-70P | CONN RCPT 17POS BOX MNT W/PINS |
| CS3108A-40-53S | CONN PLUG 60POS RT ANG W/SCKT |
| CS3106A-22-57P | CONN PLUG 19POS STRAIGHT W/PINS |
| CS3106A-24-64P | CONN PLUG 16POS STRAIGHT W/PINS |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MC145151DW2R2 | 功能描述:IC PAR-IN PLL FREQ SYNTH 28-SOIC RoHS:否 类别:集成电路 (IC) >> 时钟/计时 - 时钟发生器，PLL，频率合成器 系列:- 标准包装:39 系列:- 类型:* PLL:带旁路 输入:时钟 输出:时钟 电路数:1 比率 - 输入:输出:1:10 差分 - 输入:输出:是/是 频率 - 最大:170MHz 除法器/乘法器:无/无 电源电压:2.375 V ~ 3.465 V 工作温度:0°C ~ 70°C 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:* |
| MC145151P2 | 制造商:Motorola Inc 功能描述:Frequency Synthesizer, 28 Pin, Plastic, DIP |
| MC145152DW2 | 功能描述:锁相环 - PLL PLL Synthesizer RoHS:否 制造商:Silicon Labs 类型:PLL Clock Multiplier 电路数量:1 最大输入频率:710 MHz 最小输入频率:0.002 MHz 输出频率范围:0.002 MHz to 808 MHz 电源电压-最大:3.63 V 电源电压-最小:1.71 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:QFN-36 封装:Tray |
| MC145152DW2R2 | 功能描述:IC PAR-IN PLL FREQ SYNTH 28-SOIC RoHS:否 类别:集成电路 (IC) >> 时钟/计时 - 时钟发生器，PLL，频率合成器 系列:- 标准包装:39 系列:- 类型:* PLL:带旁路 输入:时钟 输出:时钟 电路数:1 比率 - 输入:输出:1:10 差分 - 输入:输出:是/是 频率 - 最大:170MHz 除法器/乘法器:无/无 电源电压:2.375 V ~ 3.465 V 工作温度:0°C ~ 70°C 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:* |
| MC145155P | 制造商:Motorola Inc 功能描述: |
发布紧急采购，3分钟左右您将得到回复。