cy62256ll-55ze Cypress Semiconductor Corporation., cy62256ll-55ze Datasheet - Page 5

• Manufacturer Part Number: cy62256ll-55ze
• Description: 256k 32k X 8 Static Ram
• Manufacturer: Cypress Semiconductor Corporation.

Document #: 38-05248 Rev. *F
Switching Characteristics
Read Cycle
t
t
t
t
t
t
t
t
t
t
t
Write Cycle
t
t
t
t
t
t
t
t
t
t
Notes:
10. The internal Write time of the memory is defined by the overlap of CE LOW and WE LOW. Both signals must be LOW to initiate a Write and either signal can
11. The minimum Write cycle time for Write Cycle #3 (WE controlled, OE LOW) is the sum of t
RC
AA
OHA
ACE
DOE
LZOE
HZOE
LZCE
HZCE
PU
PD
WC
SCE
AW
HA
SA
PWE
SD
HD
HZWE
LZWE
7. Test conditions assume signal transition time of 5 ns or less, timing reference levels of 1.5V, input pulse levels of 0 to 3.0V, and output loading of the specified
8. At any given temperature and voltage condition, t
9. t
I
terminate a Write by going HIGH. The data input set-up and hold timing should be referenced to the rising edge of the signal that terminates the Write.
OL
HZOE
Parameter
/I
OH
, t
and 100 pF load capacitance.
HZCE
[10, 11]
, and t
HZWE
Read Cycle Time
Address to Data Valid
Data Hold from Address Change
CE LOW to Data Valid
OE LOW to Data Valid
OE LOW to Low-Z
OE HIGH to High-Z
CE LOW to Low-Z
CE HIGH to High-Z
CE LOW to Power-up
CE HIGH to Power-down
Write Cycle Time
CE LOW to Write End
Address Set-up to Write End
Address Hold from Write End
Address Set-up to Write Start
WE Pulse Width
Data Set-up to Write End
Data Hold from Write End
WE LOW to High-Z
WE HIGH to Low-Z
are specified with C
Over the Operating Range
L
= 5 pF as in (b) of AC Test Loads. Transition is measured ±500 mV from steady-state voltage.
[8]
[8]
Description
[8, 9]
[8, 9]
[8, 9]
[8]
HZCE
is less than t
LZCE
, t
HZOE
[7]
is less than t
HZWE
LZOE
Min.
55
55
45
45
40
25
CY62256−55
5
5
5
0
0
0
0
5
and t
, and t
SD
HZWE
.
Max.
55
55
25
20
20
55
20
is less than t
Min.
LZWE
70
70
60
60
50
30
CY62256−70
5
5
5
0
0
0
0
5
for any given device.
Max.
70
70
35
25
25
70
25
CY62256
Page 5 of 14
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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