Datasheet
Preliminary
CPC945 Bridge and Memory Controller
3. Electrical and Thermal Characteristics
3.1 Absolute Maximum Ratings
Note: The absolute maximum ratings shown in Table 3-1 are stress ratings only. Operation at or beyond
these maximum ratings can cause permanent damage to the device.
Table 3-1. Absolute Maximum Ratings
Parameter
Symbol
VDD
Minimum
Maximum
2.25
Units
V
Notes
1, 2
1.5 V core logic, PCI Express supply
1.8 V DDR I/O supply
0
0
VDD3
2.8
V
1, 2
1.3 V to 1.5 V processor interface
supply
VDD2
VDD4
0
0
2.25
1.8
V
V
1, 2
1, 2
1.2 V HyperTransport data interface
supply
2.5 V I2C master interface, slave
interface, and miscellaneous signal
supply
VDD5
0
3.5
V
1, 2
1.2 V I/O pin voltage
1.5 V I/O pin voltage
1.8 V I/O pin voltage
2.5 V I/O pin voltage
Storage temperature
Note:
VIN1.2
VIN1.5
VIN1.8
VIN2.5
TSTG
– 0.60
– 0.60
– 0.60
– 0.60
– 65
1.5
1.90
2.8
V
V
1, 2
1, 2
1, 2
1, 2
3
V
3.5
V
150
°C
1. Pin voltage limits are stated at nominal I/O supply voltages of 2.5 V, 1.8 V, and 1.5 V.
2. The core voltage should be brought up first, followed by the I/O voltages. Note that correct I2C slave interface operation depends
on stable core, processor I/O, and DDR I/O voltages. No voltage should be applied to an I/O pad if the associated power supply is
not turned on.
3. This does not indicate the operating temperature of the device. See Table 3-4 on page 23 for recommended operating conditions.
This is the storage temperature for fewer than 1000 hours.
A15-6009-03
December 18, 2007 - IBM Confidential
Electrical and Thermal Characteristics
Page 21 of 69
IBM [ IBM ]
