Intel iSBC 80 Hardware Reference Manual page 41

Preparation for Use
iSBC 80/30
table 2·21. Parallel 1/0 Signal (Connectors JlIJ2) DC Characteristics
Signals Symbol
Parameter Test
Min. Max. Units
Description Conditions
Port E8
VOL
Output Low Voltage
IOL = 20 rnA 0.45
V
Bi di rectional
Drivers
VOH
Output High Voltage
IOH = -12 rnA 2.4
V
VIL
Input Low Voltage 0.95 V
VIH Input High Voltage 2.0 V
IlL
Input Current at Low V
VIN = 0.45V -5.25 rnA
CL Capacitive Load 18 pF
8255A
VOL
Output Low Voltage IOL = 1.7 rnA
0.45 V
Driver/Receiver
VOH
Output High Voltage IOH = -200 JLA
2.4 V
VIL
Input Low Voltage 0.8 V
VIH
Input High Voltage 2.0
V
IlL
Input Current at LowV
VIN = 0.45
10
JLA
IIH
Input Current at High V VIN = 5.0
10
JLA
CL
Capacitive Load 18
pF
8041/8741 A
Driver/Receiver
VOL
Output Low Voltage IOL = 1.6 rnA 0.45
V
VOH
Output High Voltage IOH ='50 JLA 2.4
V
VIL Input Low Voltage
0.8
V
VIH
Input High Voltage 2.0
V
IlL
Input
Curr~nt
at Low V VIN = 0.8V
0.4
JLA
IIH
Input Current at High V VIN = 5.25V
10
JLA
CL
Capacitive Load 18
pF
EXT INTO
VIL
Input Low Voltage 0.8
V
VIH
Input High Voltage 2.0 V
IlL
Input Current at Low V
VIN = 0.4V
-5.5
3mA
IIH
Input Current at HighV
VIN = 2."N
20 3 JLA
CL
Capacitive
~oad 15 pF
EXT INTi
VIL
Input Low Voaltage 0.8 V
VIH
Input High Voltage 2.0
V
IlL
Input Current at Low V
VIN = O.4V
-0.4 rnA
IIH
Input Current at High V VIN = 2."N
20
JLA
CL Capacitive Load
15
pF
2-28