AC82G41SLGQ3 Datasheet, PDF (560/604 Pages) Intel Corporation – Intel® 4 Series Chipset Family

Electrical Characteristics
14.3 (G)MCH Buffer Supply and DC Characteristics
14.3.1 I/O Buffer Supply Voltages
The I/O buffer supply voltage is measured at the (G)MCH package pins. The tolerances
shown in Table 50 are inclusive of all noise from DC up to 20 MHz. In the lab, the
voltage rails should be measured with a bandwidth limited oscilloscope with a roll off of
3 dB/decade above 20 MHz under all operating conditions.
Table 50 indicates which supplies are connected directly to a voltage regulator or to a
filtered voltage rail. For voltages that are connected to a filter, they should me
measured at the input of the filter.
If the recommended platform decoupling guidelines cannot be met, the system
designer will have to make tradeoffs between the voltage regulator output DC tolerance
and the decoupling performance of the capacitor network to stay within the voltage
tolerances listed in Table 50.
Table 50. I/O Buffer Supply Voltage
Symbol
Parameter
VCC_DDR
VCC_CKDDR
VCC_EXP
(Intel 82P45,
82P43, 82Q45,
82Q43, 82B43,
82G41 GMCH)
VCC_EXP
(Intel 82G45,
82G43 GMCH)
VCCA_EXP
VTT_FSB
VCC
(Intel 82P45,
82P43 MCH,
82Q45, 82Q43,
82B43, 82G41
GMCH)
VCC
(Intel 82G45,
82G43 GMCH)
VCC_CL
VCC3_3
DDR2 I/O Supply Voltage
DDR3 I/O Supply Voltage
DDR2 Clock Supply Voltage
DDR3 Clock Supply Voltage
SDVO, PCI Express* Supply Voltage
SDVO, PCI Express* Supply Voltage
SDVO, PCI Express* Analog Supply Voltage
1.2 V System Bus Input Supply Voltage
(G)MCH Core Supply Voltage
GMCH Core Supply Voltage
Controller Supply Voltage
CMOS Supply Voltage
Min
1.71
1.425
1.71
1.425
Nom
1.8
1.5
1.8
1.5
Max Unit Notes
1.89 V
1.575 V
1.89 V
3
1.575 V
1.045
1.1 1.155 V
1.095 1.125 1.155 V
1.425
1.5 1.575 V
3
1.14
1.2
1.26 V
1.045
1.1 1.155 V
1.095 1.125 1.155 V
1.045
3.135
1.1 1.155 V
3.3 3.465 V
560
Datasheet