cym1840 Cypress Semiconductor Corporation., cym1840 Datasheet - Page 4

• Manufacturer Part Number: cym1840
• Description: 256k X 32 Static Ram Module
• Manufacturer: Cypress Semiconductor Corporation.

Switching Characteristics
Switching Waveforms
Read Cycle No. 1
READ CYCLE
t
t
t
t
t
t
t
t
WRITE CYCLE
t
t
t
t
t
t
t
t
t
t
RC
AA
OHA
ACS
LZCS
HZCS
PU
PD
WC
SCS
AW
HA
SA
PWE
SD
HD
LZWE
HZWE
DATA OUT
Parameter
ADDRESS
[6]
Read Cycle Time
Address to Data Valid
Output Hold from Address Change
CS LOW to Data Valid
CS LOW to Low Z
CS HIGH to High Z
CS LOW to Power-Up
CS HIGH to Power-Down
Write Cycle Time
CS 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
[7,8]
PREVIOUS DATA VALID
Over the Operating Range
Description
[4]
[4,5]
[5]
t
OHA
t
AA
[3]
4
(continued)
t
Min.
RC
35
35
30
30
25
25
5
5
0
6
6
6
0
0
1840-35
Max.
35
35
25
35
25
Min.
45
45
40
40
30
30
5
5
0
6
6
6
0
0
1840-45
Max.
45
45
25
45
25
DATA VALID
Min.
55
55
50
50
40
35
5
5
0
6
6
6
0
0
1840-55
Max.
CYM1840
55
55
25
55
25
1840–5
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns