CY7C185-25ZC Cypress Semiconductor, CY7C185-25ZC Datasheet - Page 4

• Manufacturer Part Number: CY7C185-25ZC
• Description: 8K x 8 Static RAM
• Manufacturer: Cypress Semiconductor

Switching Characteristics
READ CYCLE
t
t
t
t
t
t
t
t
t
t
t
t
t
WRITE CYCLE
t
t
t
t
t
t
t
t
t
t
t
Shaded areas contain preliminary information.
Notes:
Parameter
RC
AA
OHA
ACE1
ACE2
DOE
LZOE
HZOE
LZCE1
LZCE2
HZCE
PU
PD
WC
SCE1
SCE2
AW
HA
SA
PWE
SD
HD
HZWE
LZWE
5.
6.
7.
8.
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
t
At any given temperature and voltage condition, t
The internal write time of the memory is defined by the overlap of CE
either signal can terminate a write by going HIGH. The data input set-up and hold timing should be referenced to the rising edge of the signal that terminates
the write.
OL
HZOE,
/I
OH
t
HZCE
and 30-pF load capacitance.
Read Cycle Time
Address to Data Valid
Data Hold from
Address Change
CE
CE
OE LOW to Data Valid
OE LOW to Low Z
OE HIGH to High Z
CE
CE
CE
CE
CE
CE
CE
CE
Write Cycle Time
CE
CE
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 LOW to High Z
WE HIGH to Low Z
, and t
[8]
1
2
1
2
1
2
1
2
1
2
1
2
LOW to Power-Down
LOW to Data Valid
HIGH to Data Valid
LOW to Low Z
HIGH to Low Z
HIGH to High Z
LOW to High Z
LOW to Power-Up
to HIGH to Power-Up
HIGH to Power-Down
LOW to Write End
HIGH to Write End
HZWE
Description
are specified with C
[7]
[6]
[6]
Over the Operating Range
[6, 7]
L
= 5 pF as in part (b) of AC Test Loads. Transition is measured 500 mV from steady state voltage.
HZCE
FOR REVIEW ONLY
Min.
is less than t
7C185–12
12
12
3
2
3
3
0
8
8
9
0
0
8
6
0
3
Max.
12
12
12
12
6
6
6
6
LZCE1
1
LOW, CE
[5]
Min.
and t
4
7C185–15
15
15
12
12
12
12
3
3
3
3
0
0
0
8
0
3
LZCE2
2
HIGH, and WE LOW. All 3 signals must be active to initiate a write and
Max.
15
15
15
15
8
7
7
7
for any given device.
Min.
7C185–20
20
20
15
15
15
15
10
5
3
5
3
0
0
0
0
5
Max.
20
20
20
20
9
8
8
7
Min.
7C185–25
25
25
20
20
20
15
10
5
3
5
3
0
0
0
0
5
Max.
25
25
25
12
10
10
20
7
Min.
7C185–35
35
35
20
20
25
20
12
5
3
5
3
0
0
0
0
5
CY7C185
Max.
35
35
35
15
10
10
20
8
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