Datasheet 31
Electrical Specifications
Table 2-11. GTL+ Asynchronous Signal Group DC Specifications
Symbol Parameter Min Max Unit Notes
1
NOTES:
1. Unless otherwise noted, all specifications in this table apply to all processor frequencies.
V
IL
Input Low Voltage 0.0 V
TT
/2 – (0.10 * V
TT
)V
2, 3
2. V
IL
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 V
IH
= GTLREF + (0.10 * V
TT
) and
V
IL
= GTLREF – (0.10 * V
TT
).
V
IH
Input High Voltage V
TT
/2 + (0.10 * V
TT
)V
TT
V
3, 4, 5, 6
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
TT
. However, input signal drivers must comply with the signal quality spec-
ifications.
6. The V
TT
referred to in these specifications refers to instantaneous V
TT
.
V
OH
Output High Voltage 0.90*V
TT
V
TT
V
5, 6,
7
7. All outputs are open drain.
I
OL
Output Low Current —
V
TT
/[(0.50*R
TT_MIN
) +
R
ON_MIN
]
A
8
8. The maximum output current is based on maximum current handling capability of the buffer and is not specified into the test
load.
I
LI
Input Leakage Current N/A ± 200 µA
9
9. Leakage to V
SS
with land held at V
TT
.
I
LO
Output Leakage Current N/A ± 200 µA
10
10. Leakage to V
TT
with land held at 300 mV.
R
ON
Buffer On Resistance 8 12 Ω -
Table 2-12. GTL+ Signal Group DC Specifications
Symbol Parameter Min Max Unit Notes
1
NOTES:
1. Unless otherwise noted, all specifications in this table apply to all processor frequencies.
V
IL
Input Low Voltage 0.0 GTLREF – (0.10 * V
TT
)V
2, 3
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
TT
referred to in these specifications is the instantaneous V
TT
.
V
IH
Input High Voltage GTLREF + (0.10 * V
TT
)V
TT
V
3, 4
4. V
IH
is defined as the voltage range at a receiving agent that will be interpreted as a logical high value.
V
OH
Output High Voltage 0.90*V
TT
V
TT
V
3
I
OL
Output Low Current N/A
V
TT
/[(0.50*R
TT_MIN
) +
R
ON_MIN
]
A-
I
LI
Input Leakage Current N/A ± 200 µA
5
5. Leakage to V
SS
with land held at V
TT
.
I
LO
Output Leakage Current N/A ± 200 µA
-
R
ON
Buffer On Resistance 8 12 Ω -
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