STK22C48-SF25TR Cypress Semiconductor Corp, STK22C48-SF25TR Datasheet - Page 10
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STK22C48-SF25TR
Manufacturer Part Number
STK22C48-SF25TR
Description
STK22C48-SF25TR
Manufacturer
Cypress Semiconductor Corp
Type
NVSRAMr
Specifications of STK22C48-SF25TR
Format - Memory
RAM
Memory Type
NVSRAM (Non-Volatile SRAM)
Memory Size
16K (2K x 8)
Speed
25ns
Interface
Parallel
Voltage - Supply
4.5 V ~ 5.5 V
Operating Temperature
0°C ~ 70°C
Package / Case
28-SOIC (8.69mm width)
Word Size
8b
Organization
2Kx8
Density
16Kb
Interface Type
Parallel
Access Time (max)
25ns
Operating Supply Voltage (typ)
5V
Package Type
SOIC
Operating Temperature Classification
Commercial
Operating Supply Voltage (max)
5.5V
Operating Supply Voltage (min)
4.5V
Operating Temp Range
0C to 70C
Pin Count
28
Mounting
Surface Mount
Supply Current
85mA
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Switching Waveforms
Notes
Document Number: 001-51000 Rev. *D
SRAM Write Cycle
t
t
t
t
t
t
t
t
t
t
10. Measured ±200 mV from steady state output voltage.
11. If WE is Low when CE goes Low, the outputs remain in the high impedance state.
12. HSB must be high during SRAM Write cycles.
13. CE or WE must be greater than V
WC
PWE
SCE
SD
HD
AW
SA
HA
HZWE
LZWE
Parameter
Cypress
[10]
[10, 11]
ADDRESS
DATA OUT
ADDRESS
DATA OUT
DATA IN
DATA IN
WE
CE
CE
WE
Parameter
t
t
t
t
t
t
t
t
t
t
AVAV
WLWH,
ELWH,
DVWH,
WHDX,
AVWH,
AVWL,
WHAX,
WLQZ
WHQX
t
t
t
t
t
t
t
ELEH
AVEL
AVEH
EHAX
WLEH
DVEH
EHDX
Alt
IH
during address transitions.
PREVIOUS DATA
t
SA
Figure 10. SRAM Write Cycle 2: CE Controlled
Figure 9. SRAM Write Cycle 1: WE Controlled
t
SA
Write cycle time
Write pulse width
Chip enable to end of write
Data setup to end of write
Data hold after end of write
Address setup to end of write
Address setup to start of write
Address hold after end of write
Write enable to output disable
Output active after end of write
Description
HIGH IMPEDANCE
t
t
AW
PWE
t
AW
t
HZWE
t
t
t
SCE
WC
SCE
t
WC
t
t
SD
HIGH IMPEDANCE
PWE
DATA VALID
DATA VALID
t
SD
Min
[12, 13]
[12, 13]
25
20
20
10
20
t
0
0
0
–
5
HA
t
t
t
HD
25 ns
HD
HA
Max
10
t
–
–
–
–
–
–
–
–
–
LZWE
Min
45
30
30
15
30
0
0
0
–
5
45 ns
STK22C48
Max
14
Page 10 of 17
–
–
–
–
–
–
–
–
–
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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