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CY7C235A
4
Switching Waveforms[5]
Programming Information
Programming support is available from Cypress as well as
from a number of third-party software vendors. For detailed
programming information, including a listing of software pack-
ages, please see the PROM Programming Information located
at the end of this section. Programming algorithms can be ob-
tained from any Cypress representative.
Switching Characteristics Over Operating Range[3, 5]
7C235A-18
7C235A-25
7C235A-30
7C235A-40
Parameter
Description
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Unit
tSA
Address Set-Up to Clock HIGH
18
25
30
40
ns
tHA
Address Hold from Clock HIGH
0
0
0
0
ns
tCO
Clock HIGH to Valid Output
12
12
15
20
ns
tPWC
Clock Pulse Width
12
12
15
20
ns
tSES
ES Set-Up to Clock HIGH
10
10
10
15
ns
tHES
ES Hold from Clock HIGH
5
5
5
5
ns
tDI
Delay from INIT to Valid Output
20
25
25
35
ns
tRI
INIT Recovery to Clock HIGH
15
20
20
20
ns
tPWI
INIT Pulse Width
15
20
20
25
ns
tCOS
Inactive to Valid Output from Clock HIGH[7]
15
20
20
25
ns
tHZC
Inactive Output from Clock HIGH[7]
15
20
20
25
ns
tDOE
Valid Output from E LOW
15
20
20
25
ns
tHZE
Inactive Output from E HIGH
15
20
20
25
ns
Notes:
7.
Applies only when the synchronous (ES) function is used.
tDI
tCO
tDOE
tHZE
tHZC
tSA
tHA
tHES
tSES
C235A-7
tPWC
tPWC
tPWC
tPWC
tPWC
tPWC
tHA
tCO
tCOS
O0 − O7
A0 − A10
INIT
CP
ES
E
tRI
tPWI
tHES
tSES
tHES
tSES
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