参数资料
型号: ICS1893AFLFT
厂商: IDT, Integrated Device Technology Inc
文件页数: 15/136页
文件大小: 0K
描述: PHYCEIVER LOW PWR 3.3V 48-SSOP
标准包装: 1,000
系列: PHYceiver™
类型: PHY 收发器
规程: MII
电源电压: 3.14 V ~ 3.47 V
安装类型: 表面贴装
封装/外壳: 48-BSSOP(0.295",7.50mm 宽)
供应商设备封装: 48-SSOP
包装: 带卷 (TR)
其它名称: 1893AFLFT
Chapter 10
DC and AC Operating Conditions
ICS1893AF, Rev. D 10/26/04
October, 2004
111
ICS1893AF Data Sheet - Release
Copyright 2004, Integrated Circuit Systems, Inc.
All rights reserved.
10.3
Recommended Component Values
There are two IEEE Std. 802.3 requirements that drive the tolerance for the frequency of the oscillator.
Clause 22.2.2.1 requires the MII TX_CLK to have an accuracy of ± 100 ppm.
Clause 24.2.3.4 is more stringent. It requires the code-bit timer to have an accuracy of 0.005% (that is, ±50 ppm).
Figure 10-1.
ICS1893AF 10TCSR and 100TCSR
Table 10-3.
Recommended Component Values for ICS1893AF
Parameter
Minimum
Typical
Maximum
Tolerance
Units
Oscillator Frequency
25
± 50 ppm
MHz
10TCSR Resistor Value
2.00k
1%
100TCSR Resistor Value
–1%
LED Resistor Value
510
1k
10k
ICS1893AF
14
15
16
VDD
10TCSR
100TCSR
2.0K
1%
Note:
1. The VDD connection to the 12.1K resistor can connect to any VDD.
VDD
12.1 K
1%
10TCSR
1.54K
1%
100TCSR
Typical Board Layouts
10TCSR and 100TCSR Bias Resistors
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