User`s manual

5.1 Power Requirements
If the fan stops, the loss of the sensor signal puts the Alpha PCI 64–275
into a low power standby mode. This protects the Alpha PCI 64–275
under fan-failure conditions.
5.2 Environmental Characteristics
The Alpha PCI 64–275 board environmental characteristics are:
• Operating temperature range of 10°C to 40°C (50°F to 104°F)
• Storage temperature range of –55°C to 125°C (–67°F to 257°F)
5.3 Physical Board Parameters
The Alpha PCI 64–275 board consists of a 6-layer printed-wiring board. The
board is populated with integrated circuit packages together with supporting
active and passive components. The Alpha PCI 64–275 is a baby-AT-size board
with the following dimensions:
• Width: 22.1 cm (8.7 in)
• Length: 33.0 cm (13.0 in)
The board can be used in enclosures that have adequate clearance for the
21064A heat sink. All ISA and PCI expansion slots are usable in standard
desktop or deskside enclosures.
Figure 5–1 shows the board and major component outlines and identifies key
components. The components are described in Table 5–2. Refer to Chapter 2
for jumper and connector locations.
5–2 Board Requirements and Parameters