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CY2907
Document #: 38-07137 Rev. *A
Page 7 of 11
Switching Characteristics at 3.3V Industrial
Parameter
Output[7]
Description
Test Conditions
Min
Max
Unit
tR
CLKA
Output Rise Time 20% to 80%
15-pF Load
3.5
ns
tF
CLKA
Output Fall Time 80% to 20%
15-pF Load
2.5
ns
tD
CLKA
Duty Cycle
15-pF Load at 1.4V
40.0
53.0
%
FI
XTALIN
Input Frequency
Crystal Oscillator
10
25
MHz
FI
XTALIN
Input Frequency
External Input Clock[8]
1
30
MHz
FO
CLKA
Output Frequency
CY2907I, 15-pF Load
0.5
80.0
MHz
CY2907FI, 15-pF Load
0.5
66.6
MHz
tJIS
CLKA
Jitter (One Sigma)
25 MHz to 100 MHz
150
ps
tJIS
CLKA
Jitter (One Sigma)
14 MHz to 25 MHz
200
ps
tJIS
CLKA
Jitter (One Sigma)
Less than 14 MHz
1
%
tJAB
CLKA
Jitter (Absolute)
25 MHz to 120 MHz
–250
+250
ps
tJAB
CLKA
Jitter (Absolute)
14 MHz to 25 MHz
–500
+500
ps
tJAB
CLKA
Jitter (Absolute)
Less than 14 MHz
3
%
tPU
Power Up Time
18
ms
tFT
CLKA
Transition Time
8 MHz to 66.6 MHz
13
ms
Switching Waveforms
Figure 1. Frequency Select Change (Transition Time)
Figure 2. Duty Cycle Timing
Figure 3. All Outputs Rise/Fall Time
Fold
SELECT
CLKA
tFT
OLD SELECT
NEW SELECT STABLE
Fnew
1.4V
t2
CLKA
t1
tD =t2 ÷ t1
CLKA
tR
20%
80%
tF
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