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| 型号： | SI5317A-C-GM |
| 厂商： | Silicon Laboratories Inc |
| 文件页数： | 15/46页 |
| 文件大小： | 0K |
| 描述： | IC CLK JITTER CLEANR PROG 36QFN |
| 应用说明： | SI5315/17 Crystal Selection AppNote |
| 特色产品： | Si5317 Jitter Cleaning Clock |
| 标准包装： | 490 |
| 系列： | DSPLL® |
| 类型： | 抖动消除器 |
| PLL： | 带旁路 |
| 输入： | 时钟，晶体 |
| 输出： | CML，CMOS，LVDS，LVPECL |
| 电路数： | 1 |
| 比率 - 输入:输出： | 1:2 |
| 差分 - 输入:输出： | 是/是 |
| 频率 - 最大： | 710MHz |
| 除法器/乘法器： | 无/无 |
| 电源电压： | 1.71 V ~ 3.63 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 36-VFQFN 裸露焊盘 |
| 供应商设备封装： | 36-QFN（6x6） |
| 包装： | 托盘 |
| 产品目录页面： | 628 (CN2011-ZH PDF) |
| 其它名称： | 336-1923 |
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Si5317
22
Rev. 1.1
3.3. PLL Self-Calibration
An internal self-calibration (ICAL) is performed before operation to optimize loop parameters and jitter
performance. While the self-calibration is being performed, the DSPLL is being internally controlled by the self-
calibration state machine. The LOL alarm will be active during ICAL. The self-calibration time tLOCKHW is given in
Any of the following events will trigger a self-calibration:
Power-on-reset (POR)
Release of the external reset pin RST (transition of RST from 0 to 1)
Change in FRQSEL, FRQTBL, BWSEL, or RATE[1:0] pins
Internal DSPLL registers out-of-range, indicating the need to relock the DSPLL
In any of the above cases, an ICAL will be initiated if a valid input clock exists with no input alarm. The external
crystal or reference clock must also be present for the self-calibration to begin. If no valid input clock is present, the
self-calibration state machine will wait until it appears, at which time the calibration will start.
After a successful ICAL has been performed with a valid input clock, no subsequent self-calibrations are performed
unless one of the above conditions are met. If the input clock is lost following self-calibration, the device enters
VCO freeze mode. When the input clock returns, the device relocks to the input clock without performing a self-
calibration.
3.3.1. Input Clock Stability during Internal Self-Calibration
An exit from reset must occur when the selected CKIN clock is stable in frequency with a frequency value that is
within the device operating range.
3.3.2. Self-Calibration caused by Changes in Input Frequency
If the selected CKIN frequency varies by 500 ppm or more within the frequency range defined by FRQSEL and
FRQTBL since the last calibration, the device may initiate a self-calibration.
3.3.3. Device Reset
Upon powerup, the device internally executes a power-on-reset (POR) which resets the internal device logic. The
pin RST can also be used to initiate a reset. The device stays in this state until a valid CKINn is present, when it
then performs a PLL self-calibration (refer to section 3.3. "PLL Self-Calibration”).
3.3.4. Recommended Reset Guidelines
Follow the recommended RESET guidelines in Table 9 that describe when reset should be applied to a device.
Table 9. Si5317 Pins and Reset
Pin #
Si5317 Pin Name
Must Reset after Changing
2FRQTBL
Yes
11
RATE0
Yes
15
RATE1
Yes
22
BWSEL0
Yes
23
BWSEL1
Yes
24
FRQSEL0
Yes
25
FRQSEL1
Yes
26
FRQSEL2
Yes
27
FRQSEL3
Yes
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SI5317A-C-GMR | 功能描述:时钟合成器/抖动清除器 Pin-Program Jitter Clean Clk 1In/2Out RoHS:否 制造商:Skyworks Solutions, Inc. 输出端数量: 输出电平: 最大输出频率: 输入电平: 最大输入频率:6.1 GHz 电源电压-最大:3.3 V 电源电压-最小:2.7 V 封装 / 箱体:TSSOP-28 封装:Reel |
| Si5317B-C-GM | 功能描述:标准时钟振荡器 Pin-Program. Jitter Cleaning Clock RoHS:否 制造商:AVX 产品:Standard Clock Oscillators 封装 / 箱体:7 mm x 5 mm 频率:75 MHz 频率稳定性:50 PPM 电源电压:2.5 V 负载电容: 端接类型:SMD/SMT 最小工作温度:0 C 最大工作温度:+ 70 C 输出格式:LVDS 尺寸: 封装:Reel 系列: |
| SI5317B-C-GMR | 功能描述:时钟合成器/抖动清除器 Pin-Program Jitter Clean Clk 1In/2Out RoHS:否 制造商:Skyworks Solutions, Inc. 输出端数量: 输出电平: 最大输出频率: 输入电平: 最大输入频率:6.1 GHz 电源电压-最大:3.3 V 电源电压-最小:2.7 V 封装 / 箱体:TSSOP-28 封装:Reel |
| Si5317C-C-GM | 功能描述:标准时钟振荡器 Pin-Program. Jitter Cleaning Clock RoHS:否 制造商:AVX 产品:Standard Clock Oscillators 封装 / 箱体:7 mm x 5 mm 频率:75 MHz 频率稳定性:50 PPM 电源电压:2.5 V 负载电容: 端接类型:SMD/SMT 最小工作温度:0 C 最大工作温度:+ 70 C 输出格式:LVDS 尺寸: 封装:Reel 系列: |
| SI5317C-C-GMR | 功能描述:时钟合成器/抖动清除器 Pin-Program Jitter Clean Clk 1In/2Out RoHS:否 制造商:Skyworks Solutions, Inc. 输出端数量: 输出电平: 最大输出频率: 输入电平: 最大输入频率:6.1 GHz 电源电压-最大:3.3 V 电源电压-最小:2.7 V 封装 / 箱体:TSSOP-28 封装:Reel |
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