参数资料
型号: MPC9448ACR2
厂商: IDT, Integrated Device Technology Inc
文件页数: 12/13页
文件大小: 0K
描述: IC CLOCK BUFFER MUX 1:12 32-LQFP
标准包装: 2,000
类型: 扇出缓冲器(分配),多路复用器
电路数: 1
比率 - 输入:输出: 1:12
差分 - 输入:输出: 是/无
输入: LVCMOS,LVPECL
输出: LVCMOS
频率 - 最大: 350MHz
电源电压: 2.375 V ~ 3.465 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 32-LQFP
供应商设备封装: 32-TQFP(7x7)
包装: 带卷 (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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