Intel 220 LE80557RE009512 Scheda Tecnica

Datasheet

31

NOTES:
1.

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

2.

V

IL

 is defined as the voltage range at a receiving agent that will be interpreted as a logical 

low value.

3.

The V

CCP

 referred to in these specifications refers to instantaneous V

CCP

.

4.

V

IH

 is defined as the voltage range at a receiving agent that will be interpreted as a logical 

high value. 

5.

V

IH

 and V

OH

 may experience excursions above V

CCP

. 

6.

All outputs are open drain.

7.

I

OL 

is measured at 0.10 * V

CCP. 

I

OH 

is measured at 0.90 * V

CCP.

8.

Leakage to V

SS

 with pin held at V

CCP

.

9.

Leakage to V

CCP

 with pin held at 300 mV

In most cases, termination resistors are not required as these are integrated into the 

processor silicon. See 

 for details on which GTL+ signals do not include on-die 

termination.

Valid high and low levels are determined by the input buffers by comparing with a 

reference voltage called GTLREF. 

 lists the GTLREF specifications for 50 Ohm 

platform. The GTL+ reference voltage (GTLREF) should be generated on the system 

board using high precision voltage divider circuits. 

NOTES:
1.

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

2.

GTLREF is to be generated from V

CCP

 by a voltage divider of 1% resistors (one divider for 

each GTLEREF pin). 

3.

R

TT

 is the on-die termination resistance measured at V

CCP

/3 of the GTL+ output driver. 

4.

COMP resistance must be provided on the system board with 1% resistors. COMP[3:0] 
resistors are tied to V

SS

. 

V

IL

Input Low Voltage 

-0.10

V

CCP

 * 0.30

V

2, 3

V

IH

Input High Voltage

V

CCP

 * 0.70

V

CCP 

+ 0.10

V

4, 5, 3

V

OL

Output Low Voltage

-0.10

V

CCP

 * 0.10

V

3

V

OH

Output High Voltage

0.90 * V

CCP

V

CCP 

+ 0.10

V

6, 5, 3

I

OL

Output Low Current

1.70

4.70

mA

3, 7

I

OH

Output High Current

1.70

4.70

mA

3, 7

I

LI

Input Leakage Current

N/A

± 100

µA

8

I

LO

Output Leakage Current

N/A

± 100

µA

9

GTLREF_PU

GTLREF pull up resistor

-1%

1000

+1%

Ω

GTLREF_PD

GTLREF pull down resistor

-1%

2000

+1%

Ω

2, 4

R

TT

Termination Resistance

48

50

62

Ω

3

COMP[0,2]

Termination Resistance

-1%

27.4

+1%

Ω

4

COMP[1,3]

Termination Resistance

-1%

54.9

+1%

Ω

4