参数资料
型号: SI5020-B-GM
厂商: Silicon Laboratories Inc
文件页数: 8/22页
文件大小: 0K
描述: IC CLK DATA REC SONET/SDH 20-QFN
标准包装: 75
系列: SiPHY™, DSPLL®
类型: 时钟和数据恢复(CDR)
PLL:
主要目的: 以太网,SONET/SDH,ATM 应用
输入: 时钟
输出: CML
电路数: 1
比率 - 输入:输出: 1:2
差分 - 输入:输出: 是/是
频率 - 最大: 2.7GHz
电源电压: 2.375 V ~ 2.625 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 20-VFQFN 裸露焊盘
供应商设备封装: 20-QFN(4x4)
包装: 管件
Si5020
16
Rev. 1.5
5. Pin Descriptions: Si5020
Figure 10. Si5020 Pin Configuration
Table 9. Si5020 Pin Descriptions
Pin #
Pin Name
I/O
Signal Level
Description
1
REXT
External Bias Resistor.
This resistor is used by onboard circuitry to estab-
lish bias currents within the device. This pin must
be connected to GND through a 10 k
1resis-
tor.
4
5
REFCLK+
REFCLK–
ISee Table 2
Differential Reference Clock.
The reference clock sets the initial operating fre-
quency used by the onboard PLL for clock and data
recovery. Additionally, the reference clock is used to
derive the clock output when no data is present.
6LOL
O
LVTTL
Loss-of-Lock.
This output is driven high when the recovered clock
frequency deviates from the reference clock by the
amount specified in Table 4 on page 7.
9
10
DIN+
DIN–
ISee Table 2
Differential Data Input.
Clock and data are recovered from the differential
signal present on these pins.
12
13
DOUT–
DOUT+
OCML
Differential Data Output.
The data output signal is a retimed version of the
data recovered from the signal present on DIN. It is
phase aligned with CLKOUT and is updated on the
rising edge of CLKOUT.
GND
Pad
Connection
15
14
13
12
11
PWRDN
DOUT+
VDD
DOUT–
VDD
1
2
3
4
5
VDD
GND
REFCLK–
REXT
REFCLK+
20
19
18
17
16
RAT
ESEL
1
RAT
ESEL
0
CL
KO
UT
CL
KO
UT
+
GND
6
7
8
9
10
LOL
GND
DIN+
DIN–
VDD
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