Revision 1.02 – January 11, 2005
PPC405CR – PowerPC 405CR Embedded Processor
Data Sheet
Table 7. Absolute Maximum Ratings
The absolute maximum ratings below are stress ratings only. Operation at or beyond these maximum ratings can cause
permanent damage to the device
Characteristic
Supply Voltage (Internal Logic)
Symbol
Value
0 to +2.7
Unit
V
VDD
OVDD
AVDD
VIN
Supply Voltage (I/O Interface)
0 to +3.6
V
PLL Supply Voltage
0 to +2.7
V
-0.6 to VDD+0.6
-0.6 to OVDD+0.6
-0.6 to OVDD+2.4
Input Voltage (2.5V CMOS receivers)
Input Voltage (3.3V LVTTL receivers)
Input Voltage (5.0V LVTTL receivers)
Storage Temperature Range
V
VIN
V
VIN
V
TSTG
TC
-55 to +150
-40 to +120
°C
°C
Case temperature under bias
Note: All specified voltages are with respect to GND.
Figure 3. Package Thermal Specifications
The PPC405CR is designed to operate within a case temperature range of -40°C to +85°C. Thermal resistance values for the E-
PBGA package in a convection environment are as follows:
Airflow
ft/min (m/sec)
Symbol
Thermal Resistance
Unit
0 (0)
100 (0.51)
200 (1.02)
Junction-to-case
θJC
θCA
2
2
2
°C/W
°C/W
Case-to-ambient 1
18
16
15
Notes:
1. For a chip mounted on a JEDEC 2S2P card without a heat sink.
2. For a chip mounted on a card with at least one signal and two power planes, the following relationships exist:
a. Case temperature, TC, is measured at top center of case surface with device soldered to circuit board.
b. TA = TC – P×θCA, where TA is ambient temperature and P is power consumption.
c. TCMax = TJMax – P×θJC, where TJMax is maximum junction temperature and P is power consumption.
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AMCC
AMCC [ APPLIED MICRO CIRCUITS CORPORATION ]
