Cypress CY62128B Spécifications - Page 5

Parcourez en ligne ou téléchargez le pdf Spécifications pour {nom_de_la_catégorie} Cypress CY62128B. Cypress CY62128B 12 pages. Mobl 1-mbit (128k x 8) 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, CE
ACE
1
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, CE
LZCE
1
t
CE
HIGH to High Z, CE
HZCE
1
t
CE
LOW to Power-up, CE
PU
1
t
CE
HIGH to Power-down, CE
PD
1
[10]
WRITE CYCLE
t
Write Cycle Time
WC
t
CE
LOW to Write End, CE
SCE
1
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
Data Set-up to Write End
SD
t
Data Hold from Write End
HD
t
WE HIGH to Low Z
LZWE
t
WE LOW to High Z
HZWE
Switching Waveforms
[12, 13]
Read Cycle No.1
ADDRESS
DATA OUT
Notes:
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
I
/I
and 100-pF load capacitance.
OL
OH
are specified with a load capacitance of 5 pF as in (b) of AC Test Loads. Transition is measured ±500 mV from steady-state voltage.
8.
t
, t
, and t
HZOE
HZCE
HZWE
9.
At any given temperature and voltage condition, t
10. The internal write time of the memory is defined by the overlap of CE
and the transition of any of these signals can terminate the write. The input data set-up and hold timing should be referenced to the leading edge of the signal that terminates
the write.
11. No input may exceed V
+ 0.5V.
CC
12. Device is continuously selected. OE, CE
13. WE is HIGH for read cycle.
Document #: 38-05300 Rev. *C
[7]
Over the Operating Range
Description
HIGH to Data Valid
2
[7, 9]
[9]
HIGH to Low Z
2
LOW to High Z
2
HIGH to Power-up
2
LOW to Power-down
2
HIGH to Write End
2
[9]
[8, 9]
t
AA
t
OHA
PREVIOUS DATA VALID
is less than t
HZCE
LZCE
1
= V
, CE
= V
.
1
IL
2
IH
62128B-55
Min.
55
5
0
5
[8, 9]
0
55
45
45
0
0
45
25
0
5
t
RC
, t
is less than t
, and t
is less than t
HZOE
LZOE
HZWE
LOW, CE
HIGH, and WE LOW. CE
and WE must be LOW and CE
2
1
CY62128B
MoBL
62128B-70
Max.
Min.
Max.
70
55
70
5
55
70
20
35
0
20
25
5
20
25
0
55
70
70
60
60
0
0
50
30
0
5
20
25
DATA VALID
for any given device.
LZWE
HIGH to initiate a write,
2
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
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