参数资料
型号: SI5315A-C-GMR
厂商: Silicon Laboratories Inc
文件页数: 30/54页
文件大小: 0K
描述: IC CLK MULT 8KHZ-644.53MHZ 36QFN
应用说明: SI5315/17 Crystal Selection AppNote
标准包装: 250
系列: DSPLL®
类型: 时钟/频率倍增器,抖动衰减器,多路复用器
PLL:
主要目的: 以太网,SONET/SDH/PDH,电信
输入: CML,CMOS,LVDS,LVPECL
输出: CML,CMOS,LVDS,LVPECL
电路数: 1
比率 - 输入:输出: 2:2
差分 - 输入:输出: 是/是
频率 - 最大: 644.53MHz
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: 带卷 (TR)
Si5315
36
Rev. 1.0
6.2. Output Clock Drivers
The Si5315 has a flexible output driver structure that can drive a variety of loads, including LVPECL, LVDS, CML,
and CMOS formats. The signal format is selected for both CKOUT1 and CKOUT2 outputs using the SFOUT [1:0]
pins. This modifies the output common mode and differential signal swing. See Table 2, “DC Characteristics” for
output driver specifications. The SFOUT [1:0] pins are three-level input pins, with the states designated as L
(ground), M (VDD/2), and H (VDD). Table 17 shows the signal formats based on the supply voltage and the type of
load being driven.
Figure 15. Typical Differential Output Circuit
Figure 16. Typical CMOS Output Circuit (Tie CKOUTn+ and CKOUTn– Together)
For the CMOS setting (SFOUT = LH), both output pins drive single-ended in-phase signals. The CKOUT+/- can be
externally shorted together for greater drive strength specified in Table 2, “DC Characteristics”.
Table 17. Output Signal Format Selection (SFOUT)
SFOUT[1:0]
Signal Format
HL
CML
HM
LVDS
LH
CMOS
LM
Disabled
MH
LVPECL
ML
Low-swing LVDS
All Others
Reserved
Si5315
Rcvr
100
Z0 = 50
CKOUTn
CMOS
Logic
CKOUTn
Optionally Tie CKOUTn
Outputs Together for Greater Strength
Si5315
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