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CY7C346
USE ULTRA37000TM FOR
ALL NEW DESIGNS
Document #: 38-03005 Rev. *B
Page 11 of 21
Military External Asynchronous Switching Characteristics[6] Over Operating Range
Parameter
Description
7C346-30
7C346-35
Unit
Min.
Max.
Min.
Max.
tACO1
Asynchronous Clock Input to Output Delay[7]
30
35
ns
tACO2
Asynchronous Clock Input to Local Feedback to
Combinatorial Output[20]
46
55
ns
tAS1
Dedicated Input or Feedback Set-Up Time to
Asynchronous Clock Input[7]
6
8
ns
tAS2
I/O Input Set-Up Time to Asynchronous Clock
Input[7]
22
28
ns
tAH
Input Hold Time from Asynchronous Clock Input[7]
8
10
ns
tAWH
Asynchronous Clock Input HIGH Time[7]
14
16
ns
tAWL
Asynchronous Clock Input LOW Time[7, 21]
11
14
ns
tACF
Asynchronous Clock to Local Feedback Input[4, 22]
18
22
ns
tAP
External Asynchronous Clock Period (1/(fMAXA4))
[4]
25
30
ns
fMAXA1
External Feedback Maximum Frequency in
Asynchronous Mode (1/(tACO1 + tAS1))
[4, 23]
27.7
23.2
MHz
fMAXA2
Maximum Internal Asynchronous Frequency[4, 24]
40
33.3
MHz
fMAXA3
Data Path Maximum Frequency in Asynchronous
Mode[4, 25]
33.3
28.5
MHz
fMAXA4
Maximum Asynchronous Register Toggle
Frequency 1/(tAWH + tAWL)
[4, 26]
40
33.3
MHz
tAOH
Output Data Stable Time from Asynchronous Clock
Input[4, 27]
15
15
ns
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