Cypress Semiconductor MoBL CY62138F Arkusz specyfikacji - Strona 5

Przeglądaj online lub pobierz pdf Arkusz specyfikacji dla Sprzęt komputerowy Cypress Semiconductor MoBL CY62138F. Cypress Semiconductor MoBL CY62138F 11 stron. 2-mbit (256k x 8) static ram

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Switching Characteristics

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
[14]
Write Cycle
t
WC
t
SCE
t
AW
t
HA
t
SA
t
PWE
t
SD
t
HD
t
HZWE
t
LZWE
Notes
11. Test conditions for all parameters other than tri-state parameters assume signal transition time of 3 ns (1V/ns) or less, timing reference levels of V
pulse levels of 0 to V
, and output loading of the specified I
CC(typ)
12. At any given temperature and voltage condition, t
13. t
, t
, and t
transitions are measured when the outputs enter a high impedance state.
HZOE
HZCE
HZWE
14. The internal write time of the memory is defined by the overlap of WE, CE
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.
Document #: 001-13194 Rev. *A
(Over the Operating Range)
Description
Read Cycle Time
Address to Data Valid
Data Hold from Address Change
CE
LOW and CE
HIGH to Data Valid
1
2
OE LOW to Data Valid
[12]
OE LOW to Low-Z
[12, 13]
OE HIGH to High-Z
CE
LOW and CE
HIGH to Low Z
1
2
CE
HIGH or CE
LOW to High-Z
1
2
HIGH to power up
CE
LOW and CE
1
2
LOW to power down
CE
HIGH or CE
1
2
Write Cycle Time
HIGH to Write End
CE
LOW and CE
1
2
Address Setup to Write End
Address Hold from Write End
Address Setup to Write Start
WE Pulse Width
Data Setup to Write end
Data Hold from Write End
[12, 13]
WE LOW to High-Z
[12]
WE HIGH to Low-Z
/I
OL
OH
is less than t
HZCE
LZCE
[11]
Min
45
10
5
[12]
10
[12, 13]
0
45
35
35
0
0
35
25
0
10
as shown in the
AC Test Loads and Waveforms on page
, t
is less than t
, and t
HZOE
LZOE
HZWE
= V
, and CE
= V
. All signals must be ACTIVE to initiate a write and any of these
1
IL
2
IH
CY62138F MoBL
45 ns
Unit
Max
45
45
22
18
18
45
18
CC(typ)
4.
is less than t
for any given device.
LZWE
Page 5 of 10
®
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
/2, input
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