MPC9448AC Freescale Semiconductor, MPC9448AC Datasheet - Page 8

• Manufacturer Part Number: MPC9448AC
• Description: IC CLOCK FANOUT BUFF 1:12 32LQFP
• Manufacturer: Freescale Semiconductor
• Type: Fanout Buffer (Distribution), Multiplexerr

Specifications of MPC9448AC

• Number Of Circuits: 1
• Ratio - Input:output: 2:12
• Differential - Input:output: Yes/No
• Input: LVCMOS, LVPECL
• Output: LVCMOS
• Frequency - Max: 350MHz
• Voltage - Supply: 2.375 V ~ 3.465 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 32-LQFP
• Frequency-max: 350MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

MPC9448
requirements and Table 9. R thja can be derived from Table 10.
The R thja represent data based on 1S2P boards, using 2S2P
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 CC = 3.3V, MTBF
Figure 9. No maximum frequency limitation for V CC = 3.3V,
T J,MAX should be selected according to the MTBF system
9.1 years, driving series terminated transmission lines,
MTBF 4 years, driving series terminated transmission
100 lfpm
200 lfpm
300 lfpm
400 lfpm
500 lfpm
Still air
board), C/W
lines, 2s2p board
R thja (1P2S
2s2p board
86
76
71
68
66
60
board), C/W
R thja (2P2S
61
56
54
53
52
49
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 CC = 3.3V,
3.3V, MTBF 4 years, 4 pF load per line, 2s2p board
Figure 10. Maximum MPC9448 frequency, V CC =
MTBF 9.1 years, 4 pF load per line, 2s2p board
TIMING SOLUTIONS