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

19 W 1

 

 

Note 3

 

 

PLL_VDD

PLL supply voltage

3.135 V

3.465 Vc

PLL_IDD

PLL supply current (running)

Freq = 600 MHz

25 mA

 

 

 

 

 

1Power measured at 37.5 MHz while running the “Ebox aliveness test.”

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

 

II

Input current

VSS V VDD

150

μA

 

 

 

 

 

 

 

Table 9–5 Input Differential Amplifier Receiver (I_DA)

 

 

 

 

 

 

 

 

 

 

 

 

 

Parameter

 

 

 

 

 

 

 

Symbol

Description

Test Conditions

Minimum

Maximum

 

 

 

 

 

 

 

 

VIL

Low-level input voltage

Note 5

 

VREF – 200 mV

 

VIH

High-level input voltage

VREF + 200 mV

 

 

II

Input current

VSS V VDD

150

μA

 

CIN

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

 

 

 

 

 

 

 

 

 

Vdiff

Differential input voltage

 

200 mv Note 1

 

 

Δ VBIAS

Open-circuit differential

I ≤ ± 1 μA

 

50 mV

 

 

 

Note 2

 

 

 

 

 

II

Input current

VSS V VDD

150

μA

 

CIN

Input-pin capacitance

Freq =10 MHz

 

5.0 pF

 

 

 

 

 

 

Note 6

 

 

 

 

 

 

 

 

 

Alpha 21264/EV67 Hardware Reference Manual

Electrical Data 9–3

Page 243
Image 243
Compaq 21264, EV67 specifications VDD Idcpower, Input DC Reference Pin Idcref, Input Differential Amplifier Receiver IDA