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参数资料
| 型号： | M66238FP |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | 50 MHz, OTHER CLOCK GENERATOR, PDSO32 |
| 封装： | 0.450 INCH, PLASTIC, SOP-32 |
| 文件页数： | 3/15页 |
| 文件大小： | 152K |
| 代理商： | M66238FP |
M66238FP
REJ03F0268-0200 Rev.2.00 Mar 18, 2008
Page 11 of 14
CKO/PLLO Output Frequency Range
The M66238 requires an internal VCO oscillator frequency of 25 MHz to 50 MHz.
Settings of dividing ratio K of 12-bit divider and dividing ratio N of 15-bit counter are required in order to determine
the internal VCO oscillator frequency. The relation between the settings and the internal VCO oscillator frequency is
shown below.
Oscillator frequency
K
11
k = 0
fVCO =
(MHz)
K =
Σ (Dk × 2k)
fin
× N
26
n = 12
N =
Σ (Dn × 2n12)
Note: 3. Setting of fin / K
≥ 100 kHz is recommended in consideration of the frequency accuracy characteristics of
PLL output.
Therefore, set the division ratio K of the 12-bit divider and the division ratio N of the 15-bit counter to meet
the following conditions:
25 MHz
≤ fvco ≤ 50 MHz
In addition, for PLLO and CKO, setting the division ratios of the sync/division circuit (synchronous clock
generating area) to 1/1, 1/2, 1/4, 1/8, 1/16, 1/32 will allow the frequencies of 0.78 Hz to 50 MHz to be
accommodated.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| M66238FP(#TF0T) | 制造商:Renesas Electronics Corporation 功能描述: |
| M66239FP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:High Speed Standard Clock Generator With Frequency Synthesizer |
| M66239FP(#RB0S) | 制造商:Renesas Electronics Corporation 功能描述: |
| M66240 | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:4-CH 16-BIT PWM GENERATOR |
| M66240FP | 功能描述:IC REG CTRLR PWM 24SOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,000 系列:- PWM 型:电压模式 输出数:1 频率 - 最大:1.5MHz 占空比:66.7% 电源电压:4.75 V ~ 5.25 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 85°C 封装/外壳:40-VFQFN 裸露焊盘 包装:带卷 (TR) |
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