Cypress CY62146DV30 Lembar Spesifikasi - Halaman 5

Jelajahi secara online atau unduh pdf Lembar Spesifikasi untuk Perangkat Keras Komputer Cypress CY62146DV30. Cypress CY62146DV30 12 halaman. 4-mbit (256k x 16) static ram

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Switching Characteristics

Parameter
Read Cycle
t
Read Cycle Time
RC
t
Address to Data Valid
AA
t
Data Hold from Address Change
OHA
t
CE LOW to Data Valid
ACE
t
OE LOW to Data Valid
DOE
t
OE LOW to LOW Z
LZOE
t
OE HIGH to High Z
HZOE
t
CE LOW to Low Z
LZCE
t
CE HIGH to High Z
HZCE
t
CE LOW to Power-Up
PU
t
CE HIGH to Power-Down
PD
t
BLE/BHE LOW to Data Valid
DBE
t
BLE/BHE LOW to Low Z
LZBE
t
BLE/BHE HIGH to HIGH Z
HZBE
[15]
Write Cycle
t
Write Cycle Time
WC
t
CE LOW to Write End
SCE
t
Address Set-up to Write End
AW
t
Address Hold from Write End
HA
t
Address Set-up to Write Start
SA
t
WE Pulse Width
PWE
t
BLE/BHE LOW to Write End
BW
t
Data Set-up to Write End
SD
t
Data Hold from Write End
HD
t
WE LOW to High-Z
HZWE
t
WE HIGH to Low-Z
LZWE
Notes:
12. Test conditions for all parameters other than three-state parameters assume signal transition time of 3 ns (1V/ns) or less, timing reference levels of V
input pulse levels of 0 to V
CC(typ.)
13. At any given temperature and voltage condition, t
given device.
14. t
, t
, t
, and t
transitions are measured when the outputs enter a high-impedence state.
HZOE
HZCE
HZBE
HZWE
15. The internal Write time of the memory is defined by the overlap of WE, CE = V
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 #: 38-05339 Rev. *A
Over the Operating Range
Description
[13]
[13, 14]
[13]
[13, 14]
[13]
[13, 14]
[13, 14]
[13]
, and output loading of the specified I
OL
is less than t
HZCE
LZCE
[12]
[10]
45 ns
55 ns
Min.
Max.
Min.
45
55
45
10
10
45
25
5
5
15
10
10
20
0
0
45
25
10
10
15
45
55
40
40
40
40
0
0
0
0
35
40
40
40
25
25
0
0
15
10
10
/I
as shown in the "AC Test Loads and Waveforms" section.
OH
, t
is less than t
, t
is less than t
HZBE
LZBE
HZOE
, BHE and/or BLE = V
. All signals must be ACTIVE to initiate a write and any
IL
IL
CY62146DV30
70 ns
Max.
Min.
Max.
70
55
70
10
55
70
25
35
5
20
25
10
20
25
0
55
70
25
35
10
20
25
70
60
60
0
0
45
60
30
0
20
25
10
CC(typ)
, and t
is less than t
LZOE
HZWE
LZWE
Page 5 of 11
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
/2,
for any
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