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ELECTRICAL AND MECHANICAL SPEC.
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This section specifies Electrical parameters for the IN440EX-D motherboard
and describes its Mechanical characteristics.
4.1.
Absolute Maximum Ratings
Stresses beyond those shown in the following table may cause permanent
damage to the system (provided for stress testing only).
Table 4.1. Absolute Maximum Ratings
Operating Temperature
0°C to + 55°C
Storage Temperature
-55°C to + 150°C
Voltage on any Signal with Respect to VSS
-0.3 to Vcc +0.3 V
Supply Voltage with Respect to VSS (5v)
-0.3 to +5.5 V
Supply Voltage with Respect to VSS (3.3V)
-0.3 to +4.0 V
The topics in this section specify the normal operating conditions for the
IN440EX-D motherboard. Exposure to absolute maximum rating conditions
for extended periods may affect the system reliability.
4.2.
Electrical
IN440EX-D DC specifications are summarized here, for motherboard
signaling environment, power connectors and 5V power budget. Refer to PCI
Local Bus Specification Rev. 2.1, and ISA Bus Specification for PCI and ISA
DC and AC electrical specifications. Refer also to the documentation for
ASIC devices used on the IN440EX-D motherboard.
4.2.1.
DC Specifications for 5V and 3.3V Signals
The following tables, show the required DC specifications for 5V and 3.3V
CPU bus signalling environment.
Table 4.2. 5 Volt DC Specifications
Symbol Parameter
Condition Min
Max
Units
Vcc
Supply Voltage
4.75
5.25
V
Vih
Input High Voltage
2.2
5.25
V
Vil
Input Low Voltage
0.3
0.8
V
Voh
Output High Voltage
Ioh, max
2.4
V
