MPC9448 Motorola, MPC9448 Datasheet - Page 8

• Manufacturer Part Number: MPC9448
• Description: 3.3V/2.5V LVCMOS 1:12 Clock Fanout Buffer
• Manufacturer: Motorola

MPC9448
requirements and Table 9. R
The R
boards will result in a lower thermal impedance than
indicated below.
MOTOROLA
Table 10. Thermal package impedance of the 32LQFP
Convection, LFPM
Figure 7. Maximum MPC9448 frequency, V
Figure 9. No maximum frequency limitation for V
T
J,MAX
9.1 years, driving series terminated transmission lines,
MTBF 4 years, driving series terminated transmission
thja
100 lfpm
200 lfpm
300 lfpm
400 lfpm
500 lfpm
Still air
represent data based on 1S2P boards, using 2S2P
should be selected according to the MTBF system
board), °C/W
lines, 2s2p board
R
thja
2s2p board
thja
86
76
71
68
66
60
(1P2S
can be derived from Table 10.
Freescale Semiconductor, Inc.
For More Information On This Product,
board), °C/W
R
thja
CC
61
56
54
53
52
49
Go to: www.freescale.com
(2P2S
= 3.3V, MTBF
CC
= 3.3V,
8
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
3.3V 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.
If the calculated maximum frequency is below 350 MHz, it
Figure 8. Maximum MPC9448 frequency, V
3.3V, MTBF 4 years, 4 pF load per line, 2s2p board
Figure 10. Maximum MPC9448 frequency, V
MTBF 9.1 years, 4 pF load per line, 2s2p board
TIMING SOLUTIONS
CC
= 3.3V,
CC
=