CY7C346
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Document #: 38-03005 Rev. *B
Page 10 of 21
Military External Synchronous Switching Characteristics[6] Over Operating Range
Parameter
Description
7C346-30
7C346-35
Unit
Min.
Max.
Min.
Max.
tPD1
Dedicated Input to Combinatorial Output Delay[7]
30
35
ns
tPD2
I/O Input to Combinatorial Output Delay[10]
45
55
ns
tPD3
Dedicated Input to Combinatorial Output Delay with
Expander Delay[11]
44
55
ns
tPD4
I/O Input to Combinatorial Output Delay with
Expander Delay[4, 12]
59
75
ns
tEA
Input to Output Enable Delay[4, 7]
30
35
ns
tER
Input to Output Disable Delay[4, 7]
30
35
ns
tCO1
Synchronous Clock Input to Output Delay
16
20
ns
tCO2
Synchronous Clock to Local Feedback to
Combinatorial Output[4, 13]
35
42
ns
tS1
Dedicated Input or Feedback Set-Up Time to
Synchronous Clock Input[7, 14]
20
25
ns
tS2
I/O Input Set-Up Time to Synchronous Clock
Input[7]
36
45
ns
tH
Input Hold Time from Synchronous Clock Input[7]
0
0
ns
tWH
Synchronous Clock Input HIGH Time
10
12.5
ns
tWL
Synchronous Clock Input LOW Time
10
12.5
ns
tRW
Asynchronous Clear Width[4, 7]
30
35
ns
tRR
Asynchronous Clear Recovery Time[4, 7]
30
35
ns
tRO
Asynchronous Clear to Registered Output Delay[7]
30
35
ns
tPW
Asynchronous Preset Width[4, 7]
30
35
ns
tPR
Asynchronous Preset Recovery Time[4, 7]
30
35
ns
tPO
Asynchronous Preset to Registered Output Delay[7]
30
35
ns
tCF
Synchronous Clock to Local Feedback Input[4, 15]
3
6
ns
tP
External Synchronous Clock Period (1/(fMAX3))
[4]
20
25
ns
fMAX1
External Feedback Maximum Frequency
(1/(tCO1 + tS1))
[4, 16]
27.7
22.2
MHz
fMAX2
Internal Local Feedback Maximum Frequency,
lesser of (1/(tS1 + tCF)) or (1/tCO1)
[4, 17]
43.4
32.2
MHz
fMAX3
Data Path Maximum Frequency, lesser of (1/(tWL +
tWH)), (1/(tS1 + tH)) or (1/tCO1)
[4, 18]
50
40
MHz
fMAX4
Maximum Register Toggle Frequency
(1/(tWL + tWH))
[4, 19]
50
40
MHz
tOH
Output Data Stable Time from Synchronous Clock
Input[4, 20]
3
3
ns
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