Electrical Characteristics
XTAL1 Clock Characteristics (external oscillator input)
Parameter
Limit Values
min. max.
1:2 2:1
Duty cycle
AC Characteristics
TA = 0 to 70 °C, VDD = 5 V ± 5%
Inputs are driven to 2.4 V for a logical "1" and to 0.4 V for a logical "0". Timing measurements
are made at 2.0 V for a logical "1" and 0.8 V for a logical "0". The AC testing input/output
waveforms are shown in figure 87.
2.4
2.0
0.8
2.0
0.8
Device
Under
Test
Test Points
C Load = 150 pF
0.45
ITS00621
Figure 87
Input/Output Waveform for AC Tests
Semiconductor Group
250