Specifications

17 January 1997 – Subject to Change
Functional Description 4–23
DC Power Distribution
Figure 4–10 AlphaPC 164 Power Distribution
ISA Conn. PCI32 Conn.
Pull-Downs
+5-V Pull-Ups
Integrated
Circuits/Clocks
Spkr
+3.3-V Pull-Ups
Fan
21164
pc164.2
PC164-10
J3
J2, J22
10
P/J21
+5 V (Vdd) +12 V -12 V -5 V
+2.5 V (Vddi)
GND (Vss)
pc164.20pc164.23
PCI64 Conn.
pc164.21
Power Connector
pc164.31
Fans
Flash
+3.3 V
+2.5-V
Regulator
pc164.32
vddi_level_h
3,5,7,13
4,6,19,20
1,2,11
15,16,17
18 12
pc164.28
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