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SLK2511BPZPG4 参数 Datasheet PDF下载

SLK2511BPZPG4图片预览
型号: SLK2511BPZPG4
PDF下载: 下载PDF文件 查看货源
内容描述: OC- 48/24 /12/3 SONET / SDH的多速率收发 [OC-48/24/12/3 SONET/SDH MULTIRATE TRANSCEIVER]
分类和应用:
文件页数/大小: 21 页 / 573 K
品牌: DBLECTRO [ DB LECTRO INC ]
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SLK2511B  
www.ti.com  
SLLS763BJANUARY 2007REVISED MARCH 2007  
APPLICATION INFORMATION (continued)  
DESIGNING WITH THE PowerPAD PACKAGE  
The SLK2511B is housed in high-performance, thermally enhanced, 100-pin PZP PowerPAD packages. Use of  
a PowerPAD package does not require any special considerations except to note that the PowerPAD, which is  
an exposed die pad on the bottom of the device, is a metallic thermal and electrical conductor. Correct device  
operation requires that the PowerPAD be soldered to the thermal land. Do not run any etches or signal vias  
under the device, but have only a grounded thermal land, as explained below. Although the actual size of the  
exposed die pad may vary, the minimum size required for the keepout area for the 100-pin PZP PowerPAD  
package is 12 mm × 12 mm.  
A thermal land, which is an area of solder-tinned-copper, is required underneath the PowerPAD package. The  
thermal land varies in size depending on the PowerPAD package being used, the PCB construction, and the  
amount of heat that needs to be removed. In addition, the thermal land may or may not contain numerous  
thermal vias, depending on PCB construction.  
Other requirements for thermal lands and thermal vias are detailed in the TI application note PowerPAD™  
Thermally Enhanced Package Application Report, TI literature number SLMA002, available via the TI Web  
pages beginning at URL http://www.ti.com.  
Figure 12. Example of a Thermal Land  
For the SLK2511B, this thermal land should be grounded to the low-impedance ground plane of the device. This  
improves not only thermal performance but also the electrical grounding of the device. It is also recommended  
that the device ground terminal landing pads be connected directly to the grounded thermal land. The land size  
should be as large as possible without shorting device signal terminals. The thermal land may be soldered to the  
exposed PowerPAD using standard reflow soldering techniques.  
While the thermal land may be electrically floated and configured to remove heat to an external heat sink, it is  
recommended that the thermal land be connected to the low-impedance ground plane of the device. More  
information may be obtained from the TI application note PHY Layout, TI literature number SLLA020.  
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