352 datasheet(26/95 Pages) INTEL

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Electrical Specifications

Datasheet

Table 11.

GTL+ Asynchronous Signal Group DC Specifications

Symbol

Parameter

Min

Max

Unit

Notes1

NOTES:

1. Unless otherwise noted, all specifications in this table apply to all processor frequencies.

VIL

Input Low Voltage

0.0

VTT/2 – (0.10 * VTT)V

2, 3

2. VIL is defined as the voltage range at a receiving agent that will be interpreted as a logical low value.

3. LINT0/INTR and LINT1/NMI use GTLREF as a reference voltage. For these two signals VIH = GTLREF +

(0.10 * VTT) and VIL= GTLREF – (0.10 * VTT).

VIH

Input High Voltage

VTT/2 + (0.10 * VTT)VTT

4, 5, 6, 3

4. VIH is defined as the voltage range at a receiving agent that will be interpreted as a logical high value.

5. VIH and VOH may experience excursions above VTT. However, input signal drivers must comply with the

signal quality specifications.

6. The VTT referred to in these specifications refers to instantaneous VTT.

VOH

Output High Voltage

0.90*VTT

VTT

7, 5, 6

7. All outputs are open drain.

IOL

Output Low Current

—

VTT/

[(0.50*RTT_MIN)+(RON_MIN)]

8. The maximum output current is based on maximum current handling capability of the buffer and is not

specified into the test load.

Input Leakage Current

N/A

± 200

µA

9. Leakage to VSS with land held at VTT.

Output Leakage Current

N/A

± 200

µA

10.Leakage to VTT with land held at 300 mV.

RON

Buffer On Resistance

Table 12.

PWRGOOD and TAP Signal Group DC Specifications

Symbol

Parameter

Min

Max

Unit Notes1,2

NOTES:

1. Unless otherwise noted, all specifications in this table apply to all processor frequencies.

2. All outputs are open drain.

VHYS

Input Hysteresis

120

396

3. VHYS represents the amount of hysteresis, nominally centered about 0.5 * VTT, for all TAP inputs.

VT+

PWRGOOD Input low-

to-high threshold

voltage

0.5 * (VTT + VHYS_MIN

+ 0.24)

0.5 * (VTT + VHYS_MAX

+ 0.24)

4, 5

4. The VTT referred to in these specifications refers to instantaneous VTT.

TAP Input low-to-high

threshold voltage

0.5 * (VTT + VHYS_MIN)0.5 * (VTT + VHYS_MAX)V

VT-

PWRGOOD Input high-

to-low threshold

voltage

0.4 * VTT

0.6 * VTT

TAP Input high-to-low

threshold voltage

0.5 * (VTT – VHYS_MAX)0.5 * (VTT – VHYS_MIN)V

VOH

Output High Voltage

N/A

VTT

6, 4

IOL

Output Low Current

—

22.2

Input Leakage Current

—

± 200

µA

Output Leakage

Current

—± 200

µA

RON

Buffer On Resistance

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