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CY7C197N-25PXC

P1-P3P4-P6P7-P9P10-P12P13-P13
CY7C197N
Document #: 001-06495 Rev. *D Page 7 of 13
Figure 6. Write Cycle No. 2 (CE Controlled)
[13, 14]
Switching Waveforms (continued)
t
WC
DATA VALID
HIGH IMPEDANCE
t
SCE
t
AW
t
SA
t
PWE
t
HA
t
HD
t
SD
ADDRESS
CE
WE
DATA IN
DATA OUT
Notes
13. The internal write time of the memory is defined by the overlap of CE
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.
14. If CE
goes HIGH simultaneously with WE HIGH, the output remains in a high-impedance state.
CY7C197N
Document #: 001-06495 Rev. *D Page 8 of 13
Typical DC and AC Characteristics
1.2
1.4
1.0
0.6
0.4
0.2
4.0 4.5 5.0 5.5 6.0
1.6
1.4
1.2
1.0
0.8
55 25 125
–55 25 125
1.2
1.0
0.8
NORMALIZED t
AA
120
100
80
60
40
20
0.0 1.0 2.0 3.0 4.0
OUTPUT SOURCE CURRENT (mA)
SUPPLY VOLTAGE (V)
NORMALIZED SUPPLY CURRENT
vs. SUPPLY VOLTAGE
AMBIENT TEMPERATURE(°C)
vs. AMBIENT TEMPERATURE
AMBIENT TEMPERATURE (°C)
OUTPUT VOLTAGE(V)
OUTPUT SOURCE CURRENT
vs. OUTPUT VOLTAGE
0.0
0.8
1.4
1.1
1.0
0.9
4.0 4.5 5.0 5.5 6.0
NORMALIZED t
AA
SUPPLY VOLTAGE(V)
NORMALIZED ACCESS TIME
vs. SUPPLY VOLTAGE
120
140
100
60
40
20
0.0 1.0 2.0 3.0 4.0
OUTPUT SINK CURRENT (mA)
0
80
OUTPUT VOLTAGE(V)
0.6
0.4
0.2
0.0
NORMALIZED I
CC
, I
SB
I
CC
I
SB
0.6
0.8
0
1.3
1.2
T
A
= 25°C
1.4
NORMALIZED I
CC
, I
SB
NORMALIZED SUPPLY CURRENT
I
SB
I
CC
V
IN
= 5.0 V
V
CC
= 5.0 V
V
CC
= 5.0 V
T
A
= 25°C
V
IN
= 5.0 V
NORMALIZED ACCESS TIME
vs. AMBIENT TEMPERATURE
vs. OUTPUT VOLTAGE
OUTPUT SINK CURRENT
T
A
= 25°C
V
CC
= 5.0 V
V
CC
= 5.0 V
T
A
= 25°C
3.0
2.5
2.0
1.5
1.0
0.5
0.0 1.0 2.0 3.0 4.0
NORMALIZED I
PO
SUPPLY VOLTAGE (V)
TYPICAL POWER-ON CURRENT
vs. SUPPLY VOLTAGE
30.0
25.0
20.0
15.0
10.0
5.0
0 200 400 600 800
DELTA t (ns)
AA
CAPACITANCE (pF)
TYPICAL ACCESS TIME CHANGE
vs. OUTPUT LOADING
1.25
1.00
0.75
10 20 30 40
NORMALIZED I
CC
CYCLE FREQUENCY (MHz)
NORMALIZED I
CC
vs. CYCLE TIME
0.0
5.0
0.0
1000
0.50
V
CC
= 4.5 V
T
A
= 25°C
V
CC
= 5.0 V
T
A
= 25°C
V
IN
= 5.0 V
CY7C197N
Document #: 001-06495 Rev. *D Page 9 of 13
Ordering Code Definitions
CY7C197N Truth Table
CE WE Input/Output Mode
H X High Z Deselect/Power-Down
L H Data Out Read
L L Data In Write
Ordering Information
Speed
(ns)
Ordering Code
Package
Diagram
Package Type
Operating
Range
25 CY7C197N-25PXC 51-85013 24-pin (300-Mil) Molded DIP (Pb-free) Commercial
Contact your local sales representative regarding availability of these parts.
C = Temperature range (Commercial)
PX = 24-pin molded DIP (Pb-free)
25 = Speed grade
197N = 256 K × 1 architecture
Family: 7C = Fast asynchronous SRAM
Company ID: CY = Cypress
7CCY 197N
-
PX
25
C
P1-P3P4-P6P7-P9P10-P12P13-P13

CY7C197N-25PXC

Mfr. #:
Buy CY7C197N-25PXC
Manufacturer:
Cypress Semiconductor
Description:
SRAM 256Kx1 SEP IO SRAM
Lifecycle:
New from this manufacturer.
Delivery:
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