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參數(shù)資料
| 型號(hào)： | SN0305042RTHR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類(lèi)： | 時(shí)鐘及定時(shí) |
| 英文描述： | 1803 SERIES, LOW SKEW CLOCK DRIVER, 4 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PQCC24 |
| 封裝： | GREEN, PLASTIC, VQFN-24 |
| 文件頁(yè)數(shù)： | 5/26頁(yè) |
| 文件大?。?/td> | 606K |
| 代理商： | SN0305042RTHR |
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www.ti.com
LVCMOS
10 pF
Y3
CDCM1804
1 k
1 k
S0079-02
PCB DESIGN FOR THERMAL FUNCTIONALITY
CDCM1804
SCAS697E – JULY 2003 – REVISED MAY 2005
PARAMETER MEASUREMENT INFORMATION (continued)
Figure 10. LVCMOS Output Loading During Device Test
It is recommended to take special care of the PCB design for good thermal flow from the QFN-24 terminal
package to the PCB.
Due to the three LVPECL outputs, the current consumption of the CDCM1804 is fixed.
JEDEC JESD51-7 specifies thermal conductivity for standard PCB boards.
Modeling the CDCM1804 with a standard 4-layer JEDEC board results in a 67.22
°C maximum temperature with
RθJA of 106.62°C/W for 25°C ambient temperature.
When deploying four thermal vias (one per quadrant), the thermal flow improves significantly, yielding 46.94
°C
maximum temperature with RθJA of 55.4°C/W for 25°C ambient temperature.
To ensure sufficient thermal flow, it is recommended to design with four thermal vias in applications enabling all
four outputs at once.
13
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SN0305042RTHT | 功能描述:時(shí)鐘緩沖器 1:3 LVPECL Clock Bfr & Add LVCMOS Out RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:5 最大輸入頻率:40 MHz 傳播延遲（最大值）: 電源電壓-最大:3.45 V 電源電壓-最小:2.375 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LLP-24 封裝:Reel |
| SN0306011PPM | 制造商:Texas Instruments 功能描述: |
| SN0307009BGHK | 制造商:Texas Instruments 功能描述: |
| SN0307009BZHK | 制造商:Texas Instruments 功能描述: |
| SN0307009GHK | 制造商:Texas Instruments 功能描述: |
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