mpc8378 Freescale Semiconductor, Inc, mpc8378 Datasheet - Page 114

• Manufacturer Part Number: mpc8378
• Description: Powerquicc Ii Pro Processor
• Manufacturer: Freescale Semiconductor, Inc

Thermal
24 Thermal
This section describes the thermal specifications of the MPC8377E.
24.1
Table 81
114
Note:
1
2
3
4
5
6
Junction-to-ambient natural convection on single layer board (1s)
Junction-to-ambient natural convection on four layer board (2s2p)
Junction-to-ambient (at 200 ft/min) on single layer board (1s)
Junction-to-ambient (at 200 ft/min) on four layer board (2s2p)
Junction-to-board thermal
Junction-to-case thermal
Ref
25.0
33.3
50.0
50.0
66.7
66.7
66.7
Values in MHz.
System PLL VCO range: 400–800 MHz.
CSB frequencies less than 133 MHz will not support Gigabit Ethernet rates.
Minimum data rate for DDR2 is 250 MHz and for DDR1 is 167 MHz.
Applies to DDR2 only.
Applies to eLBC PLL-enabled mode only.
1
LBCM DDRCM SVCOD SPMF
0
0
0
0
0
0
0
provides the package thermal characteristics for the 689 31 × 31mm TePBGA II package.
Thermal Characteristics
0
0
0
0
0
0
0
MPC8377E PowerQUICC II Pro Processor Hardware Specifications, Rev. 3
Table 80. Example Clock Frequency Combinations (continued)
4
2
4
2
2
2
2
Table 81. Package Thermal Characteristics for TePBGA II
Parameter
8
8
4
8
4
5
6
VCO
Sys
800
533
800
800
533
667
800
1,
2
CSB
266.7
266.7
200
200
400
333
400
1
,3
DDR data
rate
400
400
200
267
200
267
333
1,
5
5
4
100
133
100
133
—
—
—
/2
6
6
6
6
eLBC
Symbol
R
R
83.3
100
100
R
R
R
R
66.7
66.7
θJMA
θJMA
50
50
/4
θJB
θJC
θJA
θJA
6
6
6
1
33.3
33.3
41.6
25
25
50
50
/8
Value
21
15
16
12
8
6
333
400
× 1
—
—
—
—
—
Freescale Semiconductor
× 1.5
400
600
400
500
600
—
—
e300 Core
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
Unit
400
533
400
800
533
667
800
× 2
× 2.5
500
667
500
667
1
—
—
—
Notes
1, 2, 3
1, 2
1, 3
1, 3
4
5
600
800
600
800
× 3
—
—
—