參數(shù)資料
型號(hào): MPC9448ACR2
廠商: IDT, Integrated Device Technology Inc
文件頁(yè)數(shù): 12/13頁(yè)
文件大?。?/td> 0K
描述: IC CLOCK BUFFER MUX 1:12 32-LQFP
標(biāo)準(zhǔn)包裝: 2,000
類型: 扇出緩沖器(分配),多路復(fù)用器
電路數(shù): 1
比率 - 輸入:輸出: 1:12
差分 - 輸入:輸出: 是/無
輸入: LVCMOS,LVPECL
輸出: LVCMOS
頻率 - 最大: 350MHz
電源電壓: 2.375 V ~ 3.465 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 32-LQFP
供應(yīng)商設(shè)備封裝: 32-TQFP(7x7)
包裝: 帶卷 (TR)
MPC9448 REVISION 7 DECEMBER 21, 2012
8
2012 Integrated Device Technology, Inc.
MPC9448 Data Sheet
3.3V/2.5V LVCMOS 1:12 CLOCK FANOUT BUFFER
TJ,MAX should be selected according to the MTBF system
requirements, and Figure 9 Rthja can be derived from
Figure 10. The Rthja represent data based on 1S2P boards.
Using 2S2P boards will result in a lower thermal impedance
than indicated below.
If the calculated maximum frequency is below 350 MHz, it
becomes the upper clock speed limit for the given application
conditions. The following eight derating charts describe the
safe frequency operation range for the MPC9448. The charts
were calculated for a maximum tolerable die junction
temperature of 110°C (120°C), corresponding to an
estimated MTBF of 9.1 years (4 years), a supply voltage of
3.3 V and series terminated transmission line or capacitive
loading. Depending on a given set of these operating
conditions and the available device convection, a decision on
the maximum operating frequency can be made.
Figure 7. Maximum MPC9448 Frequency, VCC = 3.3 V,
MTBF 9.1 Years, Driving Series Terminated
transmission lines, 2s2p board
Figure 8. Maximum MPC9448 frequency, VCC = 3.3 V,
MTBF 9.1 Years, 4 pF Load per Line, 2s2p Board
Figure 9. No maximum Frequency Limitation for
VCC = 3.3 V, MTBF 4 Years, Driving Series
Terminated Transmission Lines, 2s2p Board
Figure 10. Maximum MPC9448 Frequency, VCC = 3.3 V,
MTBF 4 Years, 4 pF Load per Line, 2s2p Board
Table 10. Thermal Package Impedance of the 32ld LQFP
Convection, LFPM
Rthja (1P2S board),
C/W
Rthja (2P2S board),
C/W
Still air
86
61
100 lfpm
76
56
200 lfpm
71
54
300 lfpm
68
53
400 lfpm
66
52
500 lfpm
60
49
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