CY62147CV25/30/33
MoBL™
Switching Characteristics
Over the Operating Range
[8]
55 ns
Parameter
READ CYCLE
t
RC
t
AA
t
OHA
t
ACE
t
DOE
t
LZOE
t
HZOE
t
LZCE
t
HZCE
t
PU
t
PD
t
DBE
t
LZBE[10]
t
HZBE
WRITE CYCLE
t
WC
t
SCE
t
AW
t
HA
t
SA
t
PWE
t
BW
t
SD
t
HD
t
HZWE
t
LZWE
[12]
70 ns
Max
Min
70
55
70
10
55
25
70
35
5
20
25
10
20
25
0
55
55
70
70
5
20
25
70
60
60
0
0
50
60
30
0
20
25
5
Max
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Description
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
[9]
OE HIGH to High Z
[9, 11]
CE LOW to Low Z
[9]
CE HIGH to High Z
[9, 11]
CE LOW to Power-Up
CE HIGH to Power-Down
BHE / BLE LOW to Data Valid
BHE / BLE LOW to Low Z
[9]
BHE / BLE HIGH to High Z
[9, 11]
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
BHE / BLE Pulse Width
Data Set-Up to Write End
Data Hold from Write End
WE LOW to High Z
[9, 11]
WE HIGH to Low Z
[9]
Min
55
10
5
10
0
5
55
45
45
0
0
45
50
25
0
5
Notes:
8. Test conditions assume signal transition time of 5 ns or less, timing reference levels of V
CC(typ.)
/2, input pulse levels of 0 to V
CC(typ.)
, and output loading of the
specified I
OL
/I
OH
and 30-pF load capacitance.
9. At any given temperature and voltage condition, t
HZCE
is less than t
LZCE
, t
HZBE
is less than t
LZBE
, t
HZOE
is less than t
LZOE
, and t
HZWE
is less than t
LZWE
for
any given device.
10. If both byte enables are toggled together this value is 10 ns.
11. t
HZOE
, t
HZCE
, t
HZBE
, and t
HZWE
transitions are measured when the outputs enter a high impedance state.
12. The internal write time of the memory is defined by the overlap of WE, CE = V
IL
, BHE and/or BLE = 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 set-up and hold timing should be referenced to the edge of the signal that terminates
the write.
Document #: 38-05202 Rev. *A
Page 6 of 14
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