CY7C148 Cypress Semiconductor, CY7C148 Datasheet - Page 5

• Manufacturer Part Number: CY7C148
• Description: (CY7C148 / CY7C149) 1K x 4 Static RAM
• Manufacturer: Cypress Semiconductor

Switching Waveforms
Typical DC and AC Characteristics
Notes:
13. If CS goes HIGH simultaneously with WE HIGH, the output remains in a high-impedance state.
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
1.4
1.3
1.2
1.1
1.0
0.9
0.8
Write Cycle No. 2 (CSControlled)
4.0
DATA OUT
4.0
ADDRESS
NORMALIZED SUPPLY CURRENT
vs.SUPPLY VOLTAGE
NORMALIZED ACCESS TIME
vs.SUPPLY VOLTAGE
DATA IN
SUPPLY VOLTAGE(V)
CS
WE
SUPPLY VOLTAGE(V)
4.5
4.5
I
SB
I
CC
5.0
5.0
V
T
IN
A
=25°C
T
=5.0V
A
=25°C
5.5
5.5
(continued)
DATA UNDEFINED
6.0
6.0
[13]
1.2
1.0
0.8
0.6
0.4
0.2
0.0
1.6
1.4
1.2
1.0
0.8
0.6
55
55
NORMALIZED SUPPLY CURRENT
vs.AMBIENT TEMPERATURE
NORMALIZED ACCESS TIME
vs.AMBIENT TEMPERATURE
AMBIENT TEMPERATURE(°C)
AMBIENT TEMPERATURE(°C)
t
I
AW
SB
t
CW
t
25
25
WC
5
I
CC
V
V
V
CC
t
CC
IN
WZ
=5.0V
=5.0V
=5.0V
DATA
t
DW
t
WP
IN
VALID
125
125
140
120
100
120
100
80
60
40
20
80
60
40
20
HIGH IMPEDANCE
0
0.0
0
0.0
OUTPUT SINK CURRENT
vs.OUTPUT VOLTAGE
OUTPUT SOURCE CURRENT
vs.OUTPUT VOLTAGE
t
DH
t
WR
OUTPUT VOLTAGE(V)
1.0
OUTPUT VOLTAGE(V)
1.0
2.0
2.0
V
T
V
T
A
CC
A
CC
=25°C
=25°C
CY7C148
CY7C149
3.0
=5.0V
3.0
=5.0V
C148–9
4.0
4.0