RG82855GMESL72L Datasheet, PDF (178/213 Pages) Intel Corporation – Intel® 855GM/855GME Chipset Graphics and Memory Controller Hub (GMCH)

Electrical Characteristics
R
Symbol
SMVSWINGL
Host Interface
V_{IL_H}
V_{IH_H}
V_{OL_H}
V_{OH_H}
I_{OL_H}
I_{LEAK_H}
C_PAD
C_PCKG
DDR Interface
V_IL(DC)
V_IH(DC)
V_IL(AC)
Signal
Group
(p)
Parameter
System
Memory
RCOMP
Buffer
Differential
Amp
Reference
Voltage
Min
Nom
Max
Unit Notes
(VCCSM VCCSM * (VCCSM * V
* 0.2) - 2
0.2
0.2) + 2%
%
(a), (c)
Host AGTL+
Input Low
Voltage
-0.10
0
(0.66 x
V
VTTLF) –
0.1
(a),(c)
Host AGTL+
(0.66 x
VTT
Input High
VTTLF) +
Voltage
0.1
VTTLF+
V
0.1
(a),(b)
Host AGTL+
Output Low
Voltage
(0.33 x
V
VTTLF) +
0.1
(a),(b)
Host AGTL+
Output High
Voltage
VTTLF-
0.1
VTTLF
V
(a),(b)
Host AGTL+
Output Low
Current
VTTLFma mA Rttmin
x/0.75Rtt
=45 
min
(a),(c)
Host AGTL+
Input Leakage
Current
2
µA VOL<
Vpad<
VTTL
F, 2
(a),(c)
Host AGTL+
1
Input
Capacitance
1.1
1.3
pF
(a),(c)
Host AGTL+
1
Input
Capacitance
(common
clock)
2
2.5
pF
1
(n)
DDR SDRAM
Input Low
Voltage
(n)
DDR SDRAM SMVREF
Input High
+ 0.15
Voltage
(n)
DDR SDRAM
Input Low
Voltage
SMVREF
V
– 0.15
V
SMVREF
V
– 0.31
178
Datasheet