Cypress CY62128E Manual De Usuario
MoBL
®
CY62128E
Document #: 38-05485 Rev. *F
Page 5 of 12
Switching Characteristics
(Over the Operating Range)
Parameter
Description
45 ns (Ind’l/Auto-A)
55 ns (Auto-E)
Unit
Min
Max
Min
Max
Read Cycle
t
RC
Read Cycle Time
45
55
ns
t
AA
Address to Data Valid
45
55
ns
t
OHA
Data Hold from Address Change
10
10
ns
t
ACE
CE
1
LOW and CE
2
HIGH to Data Valid
45
55
ns
t
DOE
OE LOW to Data Valid
22
25
ns
t
LZOE
OE LOW to Low-Z
5
5
ns
t
HZOE
OE HIGH to High-Z
18
20
ns
t
LZCE
CE
1
LOW and CE
2
HIGH to Low-Z
10
10
ns
t
HZCE
CE
1
HIGH or CE
2
LOW to High-Z
18
20
ns
t
PU
CE
1
LOW and CE
2
HIGH to Power Up
0
0
ns
t
PD
CE
1
HIGH or CE
2
LOW to Power Down
45
55
ns
Write Cycle
t
WC
Write Cycle Time
45
55
ns
t
SCE
CE
1
LOW and CE
2
HIGH to Write End
35
40
ns
t
AW
Address Setup to Write End
35
40
ns
t
HA
Address Hold from Write End
0
0
ns
t
SA
Address Setup to Write Start
0
0
ns
t
PWE
WE Pulse Width
35
40
ns
t
SD
Data Setup to Write End
25
25
ns
t
HD
Data Hold from Write End
0
0
ns
t
HZWE
WE LOW to High-Z
18
20
ns
t
LZWE
WE HIGH to Low-Z
10
10
ns
Notes
12. Test conditions for all parameters other than tri-state parameters assume signal transition time of 3ns (1V/ns) or less, timing reference levels of 1.5V, input pulse
levels of 0 to 3V, and output loading of the specified I
OL
/I
OH
as shown in the
13. At any given temperature and voltage condition, t
HZCE
is less than t
LZCE
, t
HZOE
is less than t
LZOE
, and t
HZWE
is less than t
LZWE
for any given device.
14. t
HZOE
, t
HZCE
, and t
HZWE
transitions are measured when the outputs enter a high impedance state.
15. The internal Write time of the memory is defined by the overlap of WE, CE
= V
IL
. All signals must be ACTIVE to initiate a write and any of these signals can
terminate a write by going INACTIVE. The data input setup and hold timing must be referenced to the edge of the signal that terminates the write.