Cypress CY7C1446AV33 - Manual (Page 20)

CY7C1440AV33
CY7C1442AV33
CY7C1446AV33
Document #: 38-05383 Rev. *E Page 20 of 31
Switching Characteristics Over the Operating Range
[24, 25]
Parameter Description
–250 –200 –167
Unit Min. Max Min. Max. Min. Max
t
POWER
V
DD
(Typical) to the first Access [20] 1 1 1 ms
Clock
t
CYC
Clock Cycle Time 4.0 5 6 ns
t
CH
Clock HIGH 1.5 2.0 2.4 ns
t
CL
Clock LOW 1.5 2.0 2.4 ns
Output Times
t
CO
Data Output Valid After CLK Rise 2.6 3.2 3.4 ns
t
DOH
Data Output Hold After CLK Rise 1.0 1.5 1.5 ns
t
CLZ
Clock to Low-Z [21, 22, 23] 1.0 1.3 1.5 ns
t
CHZ
Clock to High-Z
[21, 22, 23]
2.6 3.0 3.4 ns
t
OEV
OE LOW to Output Valid 2.6 3.0 3.4 ns
t
OELZ
OE LOW to Output Low-Z
[21, 22, 23]
0 0 0 ns
t
OEHZ
OE HIGH to Output High-Z
[21, 22, 23]
2.6 3.0 3.4 ns
Set-up Times
t
AS
Address Set-up Before CLK Rise 1.2 1.4 1.5 ns
t
ADS
ADSC, ADSP Set-up Before CLK Rise 1.2 1.4 1.5 ns
t
ADVS
ADV Set-up Before CLK Rise 1.2 1.4 1.5 ns
t
WES
GW, BWE, BW
X
Set-up Before CLK Rise 1.2 1.4 1.5 ns
t
DS
Data Input Set-up Before CLK Rise 1.2 1.4 1.5 ns
t
CES
Chip Enable Set-up Before CLK Rise 1.2 1.4 1.5 ns
Hold Times
t
AH
Address Hold After CLK Rise 0.3 0.4 0.5 ns
t
ADH
ADSP, ADSC Hold After CLK Rise 0.3 0.4 0.5 ns
t
ADVH
ADV Hold After CLK Rise 0.3 0.4 0.5 ns
t
WEH
GW, BWE, BW
X
Hold After CLK Rise 0.3 0.4 0.5 ns
t
DH
Data Input Hold After CLK Rise 0.3 0.4 0.5 ns
t
CEH
Chip Enable Hold After CLK Rise 0.3 0.4 0.5 ns
Notes:
20. 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.
21. t
CHZ
, t
CLZ
,t
OELZ
, and t
OEHZ
are specified with AC test conditions shown in (b) of AC Test Loads. Transition is measured ± 200 mV from steady-state voltage.
22. 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.
23. This parameter is sampled and not 100% tested.
24. Timing reference level is 1.5V when V
DDQ
= 3.3V and is 1.25V when V
DDQ
= 2.5V.
25. Test conditions shown in (a) of AC Test Loads unless otherwise noted.
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