Intel 220 LE80557RE009512 Fiche De Données
Codes de produits
LE80557RE009512
Datasheet
31
Electrical Specifications
NOTES:
1.
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
3.8.3.1
GTL+ Front Side Bus Specifications
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.
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
resistors are tied to V
SS
.
Table 13.
CMOS Signal Group DC Specifications
Symbol
Parameter
Min
Max
Unit
Notes
1
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
Table 14.
GTL Bus Voltage Definitions
Symbol
Parameter
Min
Typ
Max
Units Notes
1
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