Compaq 21264, Hardware Reference Manual, Page: 243 / 356

Alpha 21264/EV67 Hardware Reference Manual
Electrical Data
9–3
DC Characteristics
Note: Current out of a 21264/EV67 pin is represented by a – symbol while a +
symbol indicates current flowing into a 21264/EV67 pin.
Table 9–3 VDD (I_DC_POWER)
Parameter Symbol Description Test Conditions Minimum Maximum
VDD Processor core supply voltage — 1.9 V 2.15 V
Power (sleep) Processor power required (sleep) @ VDD = 2.1 V
Note 3 — 19 W
1
1
Power measured at 37.5 MHz while running the “Ebox aliveness test.”
PLL_VDD PLL supply voltage — 3.135 V 3.465 Vc
PLL_IDD PLL supply current (running) Freq = 600 MHz — 25 mA
Table 9–4 Input DC Reference Pin (I_DC_REF)
Parameter
Symbol
Description Test Conditions Minimum Maximum
VREF DC input reference voltage — 600 mV VDD – 650 mV
| I
I
| Input current VSS
≤
V
≤
VDD — 150
µ
A
Table 9–5 Input Differential Amplifier Receiver (I_DA)
Parameter
Symbol
Description Test Conditions Minimum Maximum
V
IL
Low-level input voltage Note 5 — VREF – 200 mV
V
IH
High-level input voltage — VREF + 200 mV —
| I
I
| Input current VSS
≤
V
≤
VDD — 150
µ
A
C
IN
Input-pin capacitance Freq =10 MHz — 5.7 pF
Note 6
Table 9–6 Input Differential Amplifier Clock Receiver (I_DA_CLK)
Parameter
Symbol
Description Test Conditions Minimum Maximum
V
diff
Differential input voltage — 200 mv Note 1 —
|
∆
V
BIAS
| Open-circuit differential I
≤ ± 1 µ
A
Note 2
— 50 mV
| I
I
| Input current VSS
≤
V
≤
VDD — 150
µ
A
C
IN
Input-pin capacitance Freq =10 MHz — 5.0 pF
Note 6