Sonic Alert msm83c154s User Manual
ELECTRICAL CHARACTERISTICS
227
6.7 AC Characteristics Measuring Conditions
1.
Input/output signal
V
IH
V
IL
V
IH
V
IL
V
OH
V
OL
TEST POINT
V
OH
V
OL
* The input signals in AC test mode are either V
OH
(logic “1”) orV
OL
(logic “0”).
Timing measurements are made atV
IH
(logic “1”) and V
IL
(10gic “0”).
2.
Floating
V
IH
V
IL
V
IH
V
IL
V
OH
V
OL
V
OH
V
OL
Floating
* The port 0 floating interval is measured from the time the port 0 pin Voltage drops below
V
IH
after sinking to GND at 2.4mA when switching to floating status from a “1” output, and
from the time the port 0 pin Voltage exceeds V
IL
after connecting to a 400
µ
A source when
switching to floating status from a “0” output.