CY7B991
CY7B992
Document Number: 38-07138 Rev. *B
Page 9 of 19
Switching Characteristics
Over the Operating Range[2, 13] (continued)
CY7B991–5
CY7B992–5
Parameter
Description
Min
Typ
Max
Min
Typ
Max
Unit
fNOM
Operating Clock
Frequency in MHz
FS = LOW[1, 2]
15
30
15
30
MHz
FS = MID[1, 2]
25
50
25
50
FS = HIGH[1, 2 , 3]
40
80
40
80[15]
tRPWH
REF Pulse Width HIGH
5.0
5.0
ns
tRPWL
REF Pulse Width LOW
5.0
5.0
ns
tU
Programmable Skew Unit
See Table 1
tSKEWPR
Zero Output Matched-Pair Skew
(XQ0, XQ1)[16, 17]
0.1
0.25
0.1
0.25
ns
tSKEW0
Zero Output Skew (All Outputs)[16, 18]
0.25
0.5
0.25
0.5
ns
tSKEW1
Output Skew (Rise-Rise, Fall-Fall, Same
Class Outputs)[16, 19]
0.6
0.7
0.6
0.7
ns
tSKEW2
Output Skew (Rise-Fall, Nominal-Inverted,
Divided-Divided)[16, 19]
0.5
1.0
0.6
1.5
ns
tSKEW3
Output Skew (Rise-Rise, Fall-Fall, Different
Class Outputs)[16, 19]
0.5
0.7
0.5
0.7
ns
tSKEW4
Output Skew (Rise-Fall, Nominal-Divided,
Divided-Inverted)[16, 19]
0.5
1.0
0.6
1.7
ns
tDEV
Device-to-Device Skew[14, 21]
1.25
1.25
ns
tPD
Propagation Delay, REF Rise to FB Rise
–0.5
0.0
+0.5
–0.5
0.0
+0.5
ns
tODCV
Output Duty Cycle Variation[22]
–1.0
0.0
+1.0
–1.2
0.0
+1.2
ns
tPWH
Output HIGH Time Deviation from 50%[23, 24]
2.5
4.0
ns
tPWL
Output LOW Time Deviation from 50%[23, 24]
3
4.0
ns
tORISE
Output Rise Time[23, 25]
0.15
1.0
1.5
0.5
2.0
3.5
ns
tOFALL
Output Fall Time[23, 25]
0.15
1.0
1.5
0.5
2.0
3.5
ns
tLOCK
PLL Lock Time[26]
0.5
0.5
ms
tJR
Cycle-to-Cycle Output
Jitter
RMS[14]
25
25
ps
Peak-to-Peak[14]
200
200
ps
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