Switching characteristics – Cypress CY7C1338G User Manual
Page 10
CY7C1338G
Document #: 38-05521 Rev. *D
Page 10 of 17
Switching Characteristics
Over the Operating Range
[11, 12, 13, 14, 15, 16]
Parameter
Description
–133 –100
Unit
Min.
Max.
Min.
Max.
t
POWER
V
DD
(Typical) to the first Access
[11]
1
1
ms
Clock
t
CYC
Clock Cycle Time
7.5
10
ns
t
CH
Clock HIGH
2.5
4.0
ns
t
CL
Clock LOW
2.5
4.0
ns
Output Times
t
CDV
Data Output Valid After CLK Rise
6.5
8.0
ns
t
DOH
Data Output Hold After CLK Rise
2.0
2.0
ns
t
CLZ
Clock to Low-Z
[12, 13, 14]
0
0
ns
t
CHZ
Clock to High-Z
[12, 13, 14]
3.5
3.5
ns
t
OEV
OE LOW to Output Valid
3.5
3.5
ns
t
OELZ
OE LOW to Output Low-Z
[12, 13, 14]
0
0
ns
t
OEHZ
OE HIGH to Output High-Z
[12, 13, 14]
3.5
3.5
ns
Setup Times
t
AS
Address Set-up Before CLK Rise
1.5
2.0
ns
t
ADS
ADSP, ADSC Set-up Before CLK Rise
1.5
2.0
ns
t
ADVS
ADV Set-up Before CLK Rise
1.5
2.0
ns
t
WES
GW, BWE, BW
X
Set-up Before CLK Rise
1.5
2.0
ns
t
DS
Data Input Set-up Before CLK Rise
1.5
1.5
ns
t
CES
Chip Enable Set-up
1.5
2.0
ns
Hold Times
t
AH
Address Hold After CLK Rise
0.5
0.5
ns
t
ADH
ADSP, ADSC Hold After CLK Rise
0.5
0.5
ns
t
WEH
GW, BWE, BW
X
Hold After CLK Rise
0.5
0.5
ns
t
ADVH
ADV Hold After CLK Rise
0.5
0.5
ns
t
DH
Data Input Hold After CLK Rise
0.5
0.5
ns
t
CEH
Chip Enable Hold After CLK Rise
0.5
0.5
ns
Notes:
11. This part has a voltage regulator internally; t
POWER
is the time that the power needs to be supplied above V
DD
(minimum) initially before a read or write operation
can be initiated.
12. t
CHZ
, t
CLZ
,t
OELZ
, and t
OEHZ
are specified with AC test conditions shown in part (b) of AC Test Loads. Transition is measured ± 200 mV from steady-state voltage.
13. At any given voltage and temperature, t
OEHZ
is less than t
OELZ
and t
CHZ
is less than t
CLZ
to eliminate bus contention between SRAMs when sharing the same
data bus. These specifications do not imply a bus contention condition, but reflect parameters guaranteed over worst case user conditions. Device is designed
to achieve High-Z prior to Low-Z under the same system conditions.
14. This parameter is sampled and not 100% tested.
15. Timing reference level is 1.5V when V
DDQ
= 3.3V and is 1.25V when V
DDQ
= 2.5V.
16. Test conditions shown in (a) of AC Test Loads unless otherwise noted.