CY7C1049-20VM CYPRESS [Cypress Semiconductor], CY7C1049-20VM Datasheet - Page 4

• Manufacturer Part Number: CY7C1049-20VM
• Description: 512K x 8 Static RAM
• Manufacturer: CYPRESS [Cypress Semiconductor]

Document #: 38-05063 Rev. **
Switching Characteristics
READ CYCLE
t
t
t
t
t
t
t
t
t
t
t
WRITE CYCLE
t
t
t
t
t
t
t
t
t
t
Shaded areas contain advance information.
Notes:
Parameter
RC
AA
OHA
ACE
DOE
LZOE
HZOE
LZCE
HZCE
PU
PD
WC
SCE
AW
HA
SA
PWE
SD
HD
LZWE
HZWE
4.
5.
6.
7.
8.
Test conditions assume signal transition time of 3 ns or less, timing reference levels of 1.5V, input pulse levels of 0 to 3.0V, and output loading of the specified
I
t
At any given temperature and voltage condition, t
The internal write time of the memory is defined by the overlap of CE LOW, and WE LOW. CE and WE must be LOW to initiate a write, and the transition of either 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.
The minimum write cycle time for Write Cycle no. 3 (WE controlled, OE LOW) is the sum of t
OL
HZOE
/I
OH
, t
and 30-pF load capacitance.
HZCE
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
OE HIGH to High Z
CE LOW to Low Z
CE HIGH to High Z
CE LOW to Power-Up
CE HIGH to Power-Down
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
Data Set-Up to Write End
Data Hold from Write End
WE HIGH to Low Z
WE LOW to High Z
, and t
[7,8]
HZWE
are specified with a load capacitance of 5 pF as in part (b) of AC Test Loads. Transition is measured 500 mV from steady-state voltage.
Description
[6]
[6]
[5, 6]
[6]
[5, 6]
[5, 6]
[4]
Over the Operating Range
PRELIMINARY
HZCE
is less than t
LZCE
, t
HZOE
Min.
12
12
10
10
10
7C1049-12
3
0
3
0
0
0
7
0
3
is less than t
Max.
LZOE
12
12
12
6
6
6
6
, and t
HZWE
HZWE
and t
Min.
15
15
12
12
12
7C1049-15
3
0
3
0
0
0
8
0
3
SD
is less than t
.
Max.
15
15
15
7
7
7
7
LZWE
for any given device.
Min.
17
17
12
12
12
7C1049-17
3
0
3
0
0
0
8
0
3
CY7C1049
Max.
17
17
17
8
7
7
8
Page 4 of 10
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns