參數資料
型號: SI5315B-C-GMR
廠商: Silicon Laboratories Inc
文件頁數: 11/54頁
文件大?。?/td> 0K
描述: IC CLOCK MULT 8KHZ-125MHZ 36QFN
應用說明: SI5315/17 Crystal Selection AppNote
標準包裝: 250
系列: DSPLL®
類型: 時鐘/頻率倍增器,抖動衰減器,多路復用器
PLL:
主要目的: 以太網,SONET/SDH/PDH,電信
輸入: CML,CMOS,LVDS,LVPECL
輸出: CML,CMOS,LVDS,LVPECL
電路數: 1
比率 - 輸入:輸出: 2:2
差分 - 輸入:輸出: 是/是
頻率 - 最大: 125MHz
電源電壓: 1.71 V ~ 3.63 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 36-VFQFN 裸露焊盤
供應商設備封裝: 36-QFN(6x6)
包裝: 帶卷 (TR)
Si5315
Rev. 1.0
19
5. Frequency Plan Tables
For ease of use, the Si5315 is pin controlled to enable simple device configuration of the frequency plan and PLL
loop bandwidth via a predefined look up table. The DSPLL has been optimized for each frequency multiplication
and PLL loop bandwidth provided in Table 9 on page 20.
Many of the control inputs are three levels: High, Low, and Medium. High and Low are standard voltage levels
determined by the supply voltage: VDD and Ground. If the input pin is left floating, it is driven to nominally half of
VDD. Effectively, this creates three logic levels for these controls. See 1.2. "Three-Level (3L) Input Pins (With
5.1. Frequency Multiplication Plan
The input to output clock multiplication is set by the 3-level FRQSEL[3:0] pins. The device provides a wide range of
commonly used SyncE, SONET/SDH, and PDH frequency translations. The CKIN1 and CKIN2 inputs must be the
same frequency as specified in Table 9. Both CKOUT1 and CKOUT2 outputs are at the same frequency.
5.1.1. PLL Loop Bandwidth Plan
The Si5315's loop bandwidth ranges from 60 Hz to 8.4 kHz. For each frequency multiplication, its corresponding
loop bandwidth is provided in a simple look up table. (See Table 9 on page 20.) The loop bandwidth (BW) is
digitally programmable using the 3-level BWSEL [1:0] and FRQTBL input pins.
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