Sun Microsystems SME5224AUPA-400 - Manual (Page 11)

11
400 MHz CPU, 4.0 MB E-Cache
UltraSPARC ™ -II CPU Module
SME5224AUPA-400
Advanced Version
July 1999 Sun Microsystems, Inc
E LECTRICAL C HARACTERISTICS
Absolute Maximum Ratings [1]
1. Operation of the device at values in excess of those listed above will result in degradation or destruction of the device. All voltages
are defined with respect to ground. Functional operation of the device at these or any other conditions beyond those indicated under
“recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may
affect device reliability.
Symbol Parameter Rating Units
V
DD
Supply voltage range for I/O 0 to 3.8 V
V
DD_CORE
[2]
2. The V
DD_CORE
supplies voltage to the onboard DC-DC regulator. The onboard DC-DC regulator then powers the CPU core and the
SRAM I/O bus interface. The V
DD_CORE
must be lower than V
DD
, except when the CPU is being re-cycled, at which time the V
DD
can
be lower than V
DD_CORE
for 30 ms or less, provided that the current is limited to twice thew maximum CPU rating.
Supply voltage range for CPU core 0 to 3.0 V
V
I
Input voltage range [3]
3. Unless otherwise noted, all voltages are with respect to the V
SS
ground.
-0.5 to V
DD
+ 0.5 V
V
O
Output voltage range -0.5 to V
DD
+ 0.5 V
I
IK
Input clamp current ± 20 mA
I
OK
Output clamp current ± 50 mA
I
OL
Current into any output in the low state 50 mA
T
STG
Storage temperature (non-operating) -40 to 90 ° C
Recommended Operating Conditions
Symbol Parameter Min Typ Max Units
V
DD
Supply voltage for I/O 3.14 3.30 3.46 V
V
DD_CORE
Supply voltage for the CPU core [1]
1. A current of 2.6V supplies power to the DC-DC regulator which in turn supplies 1.9V to the CPU core.
2.47 2.60 2.73 V
V
SS
Ground – 0 – V
V
IH
High-level input voltage 2.0 – V
DD
+ 0.2 V
V
IL
Low-level input voltage -0.3 – 0.8 V
I
OH
High-level output current – – -4 mA
I
OL
Low-level output current – – 8 mA
T
J
Operating junction temperature – – 85 ° C
T
A
Operating ambient temperature – – – [2]
2. Maximum ambient temperature is limited by airflow such that the maximum junction temperature does not exceed T
J
. See the section
"Thermal Specifications," on page 18.
° C