- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄9580 > SI5315B-C-GM (Silicon Laboratories Inc)IC CLOCK MULT 8KHZ-125MHZ 36QFN PDF資料下載
參數(shù)資料
| 型號： | SI5315B-C-GM |
| 廠商： | Silicon Laboratories Inc |
| 文件頁數(shù)： | 33/54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： | 490 |
| 系列： | DSPLL® |
| 類型： | 時鐘/頻率倍增器，抖動衰減器，多路復用器 |
| PLL： | 無 |
| 主要目的： | 以太網(wǎng)，SONET/SDH/PDH，電信 |
| 輸入： | CML，CMOS，LVDS，LVPECL |
| 輸出： | CML，CMOS，LVDS，LVPECL |
| 電路數(shù)： | 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： | 托盤 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁當前第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁
Si5315
Rev. 1.0
39
7.1. Crystal/Reference Clock Selection
The Si5315 requires either a low-jitter external oscillator or a low-cost fundamental mode crystal to be connected to
its XA/XB pins. This serves both as a jitter reference for jitter attenuation and as a reference oscillator for stability
during holdover. The frequency the reference is not directly related to either the input or the output clock
frequencies. The range of the reference frequency is from 37 to 41 MHz. For recommendations on the selection of
the reference frequency and a list of approved crystals, see the application note AN591 which can be downloaded
In holdover, the DSPLL remains locked to this external reference. Any changes in the frequency of this reference
when the DSPLL is in holdover will be tracked by the output of the device. Note that crystals can have temperature
sensitivities. Table 18 shows how the XTAL/CLOCK pin is used to select between a crystal and an external
oscillator.
Because the crystal is used as a jitter reference, rapid changes of the crystal temperature can temporarily disturb
the output phase and frequency. For example, it is recommended that the crystal not be placed close to a fan that
is being turned off and on. If a situation such as this is unavoidable, the crystal should be thermally isolated with an
insulating cover.
7.1.1. Reference Drift
During holdover, long-term and temperature related drift of the reference input result in a one-to-one drift of the
output frequency. That is, the stability of the any-frequency output is identical to the drift of the reference frequency.
This means that for the most demanding applications where the drift of a crystal is not acceptable, an external
temperature compensated or ovenized oscillator will be required. Drift is not an issue unless the part is in holdover.
Also, the initial accuracy of the reference oscillator (or crystal) is not relevant.
Table 18. XA/XB Reference Sources
XTAL/CLOCK
Type
M
37–41 MHz external clock
L
40 MHz crystal
相關PDF資料 |
PDF描述 |
|---|---|
| MCZ33897AEF | IC TXRX CAN SGL WIRE 14-SOIC |
| VE-26X-MX-F2 | CONVERTER MOD DC/DC 5.2V 75W |
| VI-B1K-MW-F2 | CONVERTER MOD DC/DC 40V 100W |
| VE-26W-MX-F1 | CONVERTER MOD DC/DC 5.5V 75W |
| MCZ33897BEFR2 | IC TXRX CAN SGL WIRE 8-SOIC |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| SI5315B-C-GMR | 功能描述:時鐘發(fā)生器及支持產(chǎn)品 Pin-Ctrl SyncE Clk Xplier/Jitt Attn 2/2 RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-56 |
| SI5315-C | 制造商:AUK 制造商全稱:AUK corp 功能描述:IRED |
| SI5315-C(B) | 制造商:AUK 制造商全稱:AUK corp 功能描述:IRED |
| SI5315-C_1 | 制造商:AUK 制造商全稱:AUK corp 功能描述:IRED |
| SI5315-CB | 制造商:AUK 制造商全稱:AUK corp 功能描述:IRED |
發(fā)布緊急采購，3分鐘左右您將得到回復。