cym1465a Cypress Semiconductor Corporation., cym1465a Datasheet - Page 3

• Manufacturer Part Number: cym1465a
• Description: 512k X 8 Pdip Static Ram Semiconductor
• Manufacturer: Cypress Semiconductor Corporation.

Switching Characteristics
Data Retention Characteristics
Document #: 38-05269 Rev. **
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
V
I
t
t
Notes:
Parameter
RC
AA
OHA
ACE
DOE
LZOE
HZOE
LZCS
HZCS
PU
PD
WC
SCE
AW
HA
SA
PWE
SD
HD
LZWE
HZWE
CCDR3
CDR
R
3.
4.
5.
DR
[5]
Parameter
C
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.
Guaranteed, not tested.
[5]
L
= 5 pF as in part (b) of AC Test Loads and Waveforms. Transition is measured 500 mV from steady-state voltage.
V
Data Retention Current
Chip Deselect to Data Retention Time
Operation Recovery Time
CC
[4]
for Retention Data
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 Down
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
Description
Over the Operating Range
Description
[3]
[3]
[3]
Over the Operating Range (L Version Only)
No Input may exceed
Vcc+0.3V
V
CE > V
V
V
DR
IN
IN
[2]
> V
< 0.3V
= 3.0V,
Test Conditions
CC
CC
– 0.3V,
– 0.3V or
Min.
CYM1465A-70
70
10
10
70
60
60
55
30
5
0
0
0
0
5
Max.
Commercial
Min.
70
70
35
25
25
70
25
t
RC
2
0
Max.
20
Min.
CYM1465A-85
85
10
10
85
75
75
65
35
5
0
0
0
0
5
Min.
t
Industrial
RC
2
0
Max.
CYM1465A
85
85
45
30
30
85
30
Max.
20
Page 3 of 7
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Unit
ns
ns
V
A