cym1464 Cypress Semiconductor Corporation., cym1464 Datasheet - Page 3

• Manufacturer Part Number: cym1464
• Description: 512kx8 Static Ram Module Semiconductor
• Manufacturer: Cypress Semiconductor Corporation.

Switching Characteristics
Switching Characteristics
Document #: 38-05272 Rev. **
READ CYCLE
t
t
t
t
t
t
t
t
t
WRITE CYCLE
t
t
t
t
t
t
t
t
t
t
READ CYCLE
t
t
t
t
t
t
t
t
t
Notes:
RC
AA
OHA
ACS
DOE
LZOE
HZOE
LZCS
HZCS
WC
SCS
AW
HA
SA
PWE
SD
HD
LZWE
HZWE
RC
AA
OHA
ACS
DOE
LZOE
HZOE
LZCS
HZCS
Parameter
3.
4.
5.
Parameter
Test conditions assume signal transition times 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
The internal write time of the memory is defined by the overlap of CS LOW and WE LOW. Both signals must be LOW to initiate a write and 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
HZCS
/I
OH
and t
and 30-pF load capacitance.
HZWE
Read Cycle Time
Address to Data Valid
Data Hold from Address Change
CS LOW to Data Valid
OE LOW to Data Valid
OE LOW to Low Z
OE HIGH to High Z
CS LOW to Low Z
CS HIGH to High Z
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
[5]
Read Cycle Time
Address to Data Valid
Data Hold from Address Change
CS LOW to Data Valid
OE LOW to Data Valid
OE LOW to Low Z
OE HIGH to High Z
CS LOW to Low Z
CS HIGH to High Z
are specified with C
Description
Description
L
Over the Operating Range
Over the Operating Range
[4]
[4]
= 5 pF as in part (b) of AC Test Loads and Waveforms. Transition is measured 500 mV from steady-state voltage.
[4]
Min.
20
20
15
15
15
12
5
0
0
5
0
3
5
2
0
1464-20
Max.
Min.
[3]
35
10
20
20
13
10
15
15
5
0
0
0
[3]
1464-35
Min.
22
22
17
15
15
12
Max.
5
0
0
5
0
3
5
2
0
1464-22
35
35
20
15
20
Max.
22
22
13
10
15
15
Min.
45
10
5
0
0
0
1464-45
Min.
25
25
20
20
15
15
5
0
0
5
0
3
5
2
0
1464-25
Max.
45
45
25
20
15
Max.
25
25
15
10
15
15
Min.
55
10
5
0
0
0
Min.
1464-55
30
10
30
25
25
20
15
5
0
0
0
3
5
2
0
1464-30
Max.
Max.
55
55
30
15
20
CYM1464
30
30
15
10
20
15
Page 3 of 8
Unit
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
ns
ns
ns