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PALCE20V8
USE ULTRA37000TM FOR
ALL NEW DESIGNS
Document #: 38-03026 Rev. *B
Page 6 of 14
tWH
Clock Width HIGH[8]
3
588
12
ns
tWL
Clock Width LOW[8]
3
588
12
ns
fMAX1
External Maximum
Frequency (1/(tCO + tS))
[8,11]
143
83
58
45.5
37
MHz
fMAX2
Data Path Maximum
Frequency (1/(tWH + tWL))
[8, 12]
166.6
100
62.5
62.5
41.6
MHz
fMAX3
Internal Feedback Maximum
Frequency (1/(tCF + tS))
[8,13]
166.6
100
62.5
50
40
MHz
tCF
Register Clock to
Feedback Input[8, 14]
3
3
6
8
10
ns
tPR
Power-Up Reset Time[8]
1
111
1
µs
Military Switching Characteristics[3]
Parameter
Description
20V8
−10
20V8
−15
20V8
−25
Min.
Max.
Min.
Max.
Min.
Max.
Unit
tPD
Input to Output Propagation Delay[9]
110
1
15
1
25
ns
tPZX
OE to Output Enable
10
15
20
ns
tPXZ
OE to Output Disable
10
15
20
ns
tEA
Input to Output Enable Delay[8]
10
15
25
ns
tER
Input to Output Disable Delay[8,10]
10
15
25
ns
tCO
Clock to Output Delay[9]
110
1
12
1
20
ns
tS
Input or Feedback Set-Up Time
10
12
20
ns
tH
Input Hold Time
0
0
0
ns
tP
External Clock Period (tCO + tS)20
24
40
ns
tWH
Clock Width HIGH[8]
810
15
ns
tWL
Clock Width LOW[8]
810
15
ns
fMAX1
External Maximum Frequency
(1/(tCO + tS)
[8,11]
50
41.7
25
MHz
fMAX2
Data Path Maximum Frequency
(1/(tWH + tWL))
[8, 12 ]
62.55033.3
MHz
fMAX3
Internal Feedback Maximum
Frequency (1/(tCF + tS))
[8,13]
62.55033.3
MHz
tCF
Register Clock to
Feedback Input[8, 14]
68
10
ns
tPR
Power-Up Reset Time[8]
11
1
µs
Commercial and Industrial Switching Characteristics (continued)[3]
Parameter
Description
20V8
−520V8−7
20V8
−10
20V8
−15
20V8
−25
Unit
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
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