82801DB Datasheet, PDF (521/587 Pages) Intel Corporation – Intel 82801DB I/O Controller Hub 4 (ICH4)

Electrical Characteristics
Table 17-2. DC Characteristic Input Signal Association (Sheet 2 of 2)
Symbol
Associated Signals
V_IL9/V_IH9
V_IL10/V_IH10
V_IL11/V_IH11
(5 V Tolerant)
Real Time Clock Signals: RTCX1
APIC Signals: APICD[1:0]
USB Signals: OC[5:0]#
V_IL12/V_IH12
V_IL13/V_IH13
V+/V-/VHYS/
VTHRAVG/
VRING
(5 V Tolerant)
AC ’97 Signals: AC_BITCLK, AC_SDIN[2:0]
Clock Signals: APICCLK
IDE Signals: PDD[15:0], SDD[15:0], PDDREQ, PIORDY, SDDREQ, SIORDY
For Ultra DMA Mode 4 and lower these signals follow the DC characteristics for _VIH2/VIL2
V_DI / V_CM /
V_SE
VVV_{HHHSSSDSCSQMC}^//
USB Signals: USBP[5:0][P,N] (Low-speed and Full-speed)
USB Signals: USBP[5:0][P,N] (in High-speed Mode)
Table 17-3. DC Input Characteristics (Sheet 1 of 2)
Symbol
V_IL1
V_IH1
V_IL2
V_IH2
V_IL3
V_IH3
V_IL4
V_IH4
V_IL5
V_IH5
V_IL6
V_IH6
V_IL7
V_IH7
VIL8
Parameter
Input Low Voltage
Input High Voltage
Input Low Voltage
Input High Voltage
Input Low Voltage
Input High Voltage
Input Low Voltage
Input High Voltage
Input Low Voltage
Input High Voltage
Input Low Voltage
Input High Voltage
Input Low Voltage
Input High Voltage
Input Low Voltage
VIH8
V_IL9
V_IH9
V_IL10
Input High Voltage
Input Low Voltage
Input High Voltage
Input Low Voltage
Min
–0.5
0.5Vcc3_3
–0.5
2.0
–0.5
2.0
–0.5
0.5Vcc3_3
–0.5
2.1
–0.5
0.6Vcc3_3
–0.15
0.73(V_CPU_IO)
–0.5
–0.3
HIREF + 0.20
HIREF + 0.10
–0.5
0.40
–0.15
Max
0.3Vcc3_3
V5REF + 0.5
0.8
V5REF + 0.5
0.8
Vcc3_3 + 0.5
0.3Vcc3_3
Vcc3_3 + 0.5
0.8
VccSus3_3 + 0.5
0.3Vcc3_3
Vcc3_3 + 0.5
0.58(V_CPU_IO)
V_CPU_IO
HIREF – 0.15
HIREF – 0.10
VccHI + 0.5
1.2
0.10
1.0
.7
Unit
Notes
V
V
V
V
V
V
V
V
V
V
V
V
V
V
HI 1.0 Mode
V
HI 1.5 Mode
HI 1.0 Mode
V
HI 1.5 Mode
V
V
V
Intel^® 82801DB ICH4 Datasheet
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