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CY7B9950
Document #: 38-07338 Rev. *D
Page 7 of 12
AC Test Loads and Waveforms
Figure 2. AC Test Loads
Figure 3. Output Waveforms
Figure 4. Test Waveforms
Output
20 pF
Output
20 pF
150
Ω
150
Ω
VDDQ
For Lock Output
For All Other Outputs
2.0V
0.8V
VTH =1.5V
t
PW L
t
PWH
t
ORISE
t
OFALL
3.3V LVTTL OUTPUT WAVEFORM
2.5V LVTTL OUTPUT WAVEFORM
1.7V
0.7V
VTH =1.25V
t
PWL
t
PWH
t
ORISE
t
OFALL
2.0V
0.8V
VTH =1.5V
≤1 ns
≤1 ns
3.0V
0V
3.3V LVTTL INPUT TEST WAVEFORM
1.7V
0.7V
VTH =1.25V
≤1 ns
≤1 ns
2.5V
0V
2.5V LVTTL INPUT TEST WAVEFORM
AC Input Specifications
Parameter
Description
Condition
Min
Max
Unit
TR,TF
Input Rise/Fall Time
0.8V – 2.0V
–
10
ns/V
TPWC
Input Clock Pulse
HIGH or LOW
2
–
ns
TDCIN
Input Duty Cycle
10
90
%
FREF
Reference Input
Frequency
FS = LOW
6
50
MHz
FS = MID
12
100
FS = HIGH
24
200
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