11
400 MHz CPU, 4.0 MB E-Cache
UltraSPARC-II CPU Module SME5224AUPA-400
Advanced Version
July 1999 Sun Microsystems, Inc
ELECTRICAL CHARACTERISTICS
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
aredefined with respect to ground. Functional operation of the device at these or any other conditions beyondthose 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
VDD Supply voltage range for I/O 0 to 3.8 V
VDD_CORE [2]
2. The VDD_CORE supplies voltage to the onboard DC-DC regulator. The onboard DC-DC regulator then powers the CPU core and the
SRAMI/O bus interface. The VDD_CORE must be lower than VDD,except when the CPU is being re-cycled, at which time the VDD can
be lower than VDD_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
VIInput voltage range [3]
3. Unless otherwise noted, all voltages are with respect to the VSSground.
-0.5 to VDD + 0.5 V
VOOutput voltage range -0.5 to VDD + 0.5 V
IIK Input clamp current ±20 mA
IOK Output clamp current ±50 mA
IOL Current into any output in the low state 50 mA
TSTG Storage temperature (non-operating) -40 to 90 °C

Recommended Operating Conditions

Symbol Parameter Min Ty p Max Units
VDD Supply voltage for I/O 3.14 3.30 3.46 V
VDD_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
VSS Ground – 0 – V
VIH High-level input voltage 2.0 VDD + 0.2 V
VIL Low-level input voltage -0.3 0.8 V
IOH High-level output current -4 mA
IOL Low-level output current 8 mA
TJOperating junction temperature 85 °C
TAOperating ambient temperature [2]
2. Maximum ambient temperature is limited by airflow such that the maximum junction temperature does not exceed TJ. See the section
"Thermal Specifications," on page 18.
°C