82801DB Datasheet, PDF (522/587 Pages) Intel Corporation – Intel 82801DB I/O Controller Hub 4 (ICH4)

Electrical Characteristics
Table 17-3. DC Input Characteristics (Sheet 2 of 2)
Symbol
Parameter
V_IH10
V_IL11
V_IH11
V_IL12
V_IH12
V_IL13
V_IH13
V+
Input High Voltage
Input Low Voltage
Input High Voltage
Input Low Voltage
Input High Voltage
Input Low Voltage
Input High Voltage
Low to high input threshold
V-
High to low input threshold
VHYS
Difference between input
thresholds:
(V+current value) –
(V-current value)
Average of thresholds:
VTHRAVG _{((V+current value) +}
(V-current value))/2
VRING
AC Voltage at recipient
connector
V_DI
Differential Input Sensitivity
V_CM
Differential Common Mode
Range
V_SE
Single-Ended Receiver
Threshold
V_HSSQ
HS Squelch Detection
Threshold
V_HSDSC
HS Disconnect Detection
Threshold
V_HSCM
HS Data Signaling Common
Mode Voltage Range
V_HSSQ
HS Squelch detection
threshold
V_HSDSC
HS disconnect detection
threshold
V_HSCM
HS data signaling common
mode voltage range
Min
1.25
–0.5
2.0
–0.5
0.65Vcc3_3
–0.5
2.0
1.5
1.0
320
1.3
–1
0.2
0.8
0.8
100
525
–50
100
525
–50
Max
Unit
Notes
2.1
V
0.8
V
V5REF_SUS + 0.5 V
0.35Vcc3_3
V
Vcc3_3 + 0.3
V
0.7
V
3.28
V
2.0
V1
1.5
V1
mV
1
V
1.7
1
6
V _1,2
V 3,5
2.5
V 4,5
2.0
V5
150
mV 5
625
mV 5
500
mV 5
150
mV 5
625
mV 5
500
mV 5
NOTES:
1. Applies to Ultra DMA Modes greater than Ultra DMA Mode 4
2. This is an AC Characteristic that represents transient values for these signals
3. V_DI = | USBPx[P] – USBPx[N]
4. Includes V_DI range
5. Applies to high-speed USB 2.0
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Intel^® 82801DB ICH4 Datasheet