82801DB Datasheet, PDF (519/587 Pages) Intel Corporation – Intel 82801DB I/O Controller Hub 4 (ICH4)

Electrical Characteristics
Electrical Characteristics
17
17.1
This chapter provides the absolute maximum ratings, DC characteristics, AC characteristics, and
AC timing diagrams.
Absolute Maximum Ratings
Parameter
Voltage on Any 3.3 V Pin with Respect to Ground
Voltage on Any 5 V Tolerant Pin with Respect to Ground (VREF=5V)
1.5 V Supply Voltage with Respect to Vss
1.8 V Supply Voltage with Respect to Vss
3.3 V Supply Voltage with Respect to Vss
5.0 V Supply Voltage (Vref) with Respect to Vss
Maximum Limits
–0.5 to Vcc3_3 + 0.5 V
–0.5 to VREF + 0.5 V
–0.5 to +2.1 V
–0.5 to +2.1 V
–0.5 to +4.6 V
–0.5 to +5.5 V
Warning: Stressing the device beyond the “Absolute Maximum Ratings” may cause permanent damage.
These are stress ratings only. See Section 17.2 for the Functional Operating Range of the ICH4.
Note: A non-condensing environment is required to maintain RTC accuracy.
17.2
Functional Operating Range
All of the AC and DC Characteristics specified in this document assume that the ICH4 component
is operating within the Functional Operating Range given in this section. Operation outside of the
Functional Operating Range is not recommended, and extended exposure outside of the Functional
Operating Range may affect component reliability.
1.5 V Supply Voltage (Vcc1_5, VccHI, VccSus1_5) with respect to Vss
1.8 V Supply Voltage (VccHI when operating in HI 1.0 mode) with respect to
Vss
3.3 V Supply Voltage (Vcc3_3, VccSus3_3) with respect to Vss
5 V Supply Voltage (V5REF, V5REF_Sus) with respect to Vss
V_CPU_IO Voltage with respect to Vss
1.425 V to 1.575 V
1.71 V to 1.89 V
3.135 V to 3.465 V
4.75 V to 5.25 V
0.8 V—1.75 V
Intel^® 82801DB ICH4 Datasheet
519