70
8Bit Single Chip Microcontroller
DMC73C168
7.4 AC Characteristics for Input/Output Ports
7.4.1 AC Characteristics for Input/Output Ports
(Vss = 0V, VDD = 4.5 ~ 5.5V, Topr = -40 to 85¡ É)
PARAMETER
VCOH operating
TEST CONDITION
MIN
10
NOM
MAX
150
UNIT
VCOH
VCOL
FMIF
Vin = 0.3 Vp-p
Vin = 0.3 Vp-p
Vin = 0.1 Vp-p
Vin = 0.1 Vp-p
MHz
MHz
MHz
MHz
frequency
VCOL Operating
frequency
0.5
1
40
20
5
FMIF operating
freuquency
AMIF operating
freuquency
AMIF
0.1
7.4.2 AC Characteristics for clock I/O
PARAMETER
TEST CONDITION
MIN
NOM
MAX
20
UNIT
nS
Clock pulse rise time
Clock pulse hold time
tr (c)
tf (c)
10
55
nS
%
Clock pulse duty cycle dty (c)
45
Y
50
X
XTAL IN
RTC IN
X OR Y
DUTY(%) =
x 100
T (c)
T (c) = X + Y
Note : Timing points are 90% (high) and 10% (low)
Figure 7-1. External driven clock waveform
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