![](http://datasheet.mmic.net.cn/340000/82865G_datasheet_16452471/82865G_192.png)
Intel
82865G/82865GV GMCH Datasheet
193
Electrical Characteristics
NOTES:
1. Absolute max overshoot = 4.5 V
2. Crossing voltage is defined as the instantaneous voltage value when the rising edge of HCLKP equals the
falling edge of HCLKN.
3. The crossing point must meet the absolute and relative crossing point specifications simultaneously.
4. V
is the statistical average of the V
measured by the oscilloscope.
5. VHavg can be measured directly using “Vtop” on Agilent* oscilloscopes and “High” on Tektronix
oscilloscopes.
6. Maximum leakage current specification for the GVREF pin is 65 uA. The Maximum leakage current
specification for the GVSWING pin is 50 μA. Refer to
Intel
865G/865GV/865PE/865P Chipset Platform
Design Guide
for the resistor divider circuit details that take this specification into account.
7. Maximum leakage current specification for HI_VREF and HI_SWING pins is 50 μA. Refer to 865G
/865GV
/
865PE/865P Chipset Platform Design Guide for the resistor divider circuit details that take this specification
into account.
8. Maximum leakage current specification for CI_VREF and CI_SWING pins is 50 μA. Refer to 865G
/865GV
/
865PE Chipset Platform Design Guide for the resistor divider circuit details that take this specification into
account.
2.6 V Miscellaneous Signals (3.3 V tolerant)
V
IL
(t)
2.6 V Input Low Voltage
0.4
V
V
IH
(t)
2.6 V Input High Voltage
VCC_DDR – 0.4
VCC_DAC
V
I
LEAK
(t)
2.6 V Input Leakage
Current
±50
μ
A
C
IN
(t)
2.6 V Input Capacitance
5.5
pF
3.3 V Miscellaneous Signals
V
IL
(o)
3.3V Input Low Voltage
0.4
V
V
IH
(o)
3.3 V Input High Voltage
VCC_DAC – 0.4
VCC_DAC
V
V
OL
(o)
3.3 V Output Low
Voltage
0.2
V
V
OH
(o)
3.3 V Output High
Voltage
VCC_DAC – 0.2
V
I
OL
(o)
3.3 V Output Low
Current
50
mA
@V
OL
max
I
OH
(o)
3.3 V Output High
Current
–50
mA
@V
OH
min
I
LEAK
(o)
3.3 V Input Leakage
Current
±50
μ
A
C
IN
(o)
3.3 V Input Capacitance
5.5
pF
FSB Select Signals
V
IL
(w)
Input Low Voltage
0.4
V
V
IH
(w)
Input High Voltage
0.8
V
Clocks
V
IL
(x)
Input Low Voltage
0.4
V
V
IH
(x)
Input High Voltage
VCC_DDR – 0.4
VCC_DAC
V
1
I
LEAK
(x)
Input Leakage Current
100
μ
A
C
IN
(x)
Input Capacitance
5.5
pF
V
CROSS(abs)
(j)
Absolute Crossing
Voltage
0.250
NA
0.550
V
2,3
V
CROSS(rel)
(j)
Relative Crossing
Voltage
0.250 + 0.5
(V
Havg
– 0.700)
0.550 +
0.5(V
Havg
– 0.700)
V
3,4,5
Table 38. DC Characteristics (Sheet 3 of 3)
Symbol
Signal
Group
Parameter
Min
Nom
Max
Unit
Notes