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Electrical Characteristics
R
Intel
®
82845 MCH for SDR Datasheet 123
Symbol Signal
Group
Parameter Min Typ Max Unit Notes
C
I/0
(k,m,p) Input Capacitance 4.65 5.37 pF
1.5 V Interface
V
IL
(e,f) Input Low Voltage 0.4 x VCC1_5 V
V
IH
(e,f) Input High Voltage 0.6 x VCC1_5 V
V
OL
(e,g) Output Low Voltage 0.15 x VCC1_5 V
V
OH
(e,g) Output High Voltage 0.85 x VCC1_5 V
I
OL
(e,g) Output Low Current 1 mA @V
OL_A
max
I
OH
(e,g) Output High Current -0.2 mA @V
OH_A
max
I
LEAK
(e,f) Input Leakage Current ±15 µA 0<Vin<VCC1_5
C
IN
(e,f) Input Capacitance 1.32 1.92 pF
1.8 V Interface
V
IL
(i,o) Input Low Voltage HI_REF – 0.15 V
V
IH
(i,o) Input High Voltage HI_REF + 0.15 V
V
OL
(i,o) Output Low Voltage 0.1 x VCC1_8 V I
OL
= 1 mA
V
OH
(i,o) Output High Voltage 0.9 x VCC1_8 V I
OH
= 1 mA
I
OL
(i,o) Output Low Current 1 mA @V
OL_HI
max
I
OH
(i,o) Output High Current -1 mA @V
OH_HI
max
I
LEAK
(i,o) Input Leakage Current -150, +15 µA 0<Vin<VCC1_8
C
IN
(i,o) Input Capacitance 2.58 3.17 pF
Clock Signals
V
IL
(v) Input Low Voltage 0.8 V
V
IH
(v) Input High Voltage 2.4 V
C
IN
(v) Input Capacitance 1.2 1.4 pF
V
IL
(w) Input Low Voltage 0 V
V
IH
(w) Input High Voltage 0.660 0.710 0.850 V
V
CROSS
(w) Crossing Voltage 0.45 x (V
IH
– V
IL
) 0.5 x (V
IH
– V
IL
) 0.55 x (V
IH
– V
IL
)V
C
IN
(w) Input Capacitance 0.94 1.1 pF
RSTIN# Signals
V
IL
(p) Input Low Voltage 0.8 V
V
IH
(p) Input High Voltage 2.0 V
I
LEAK
(p) Input Leakage Current ±100 µA 0<Vin<VCC3_3