STK25C48-W25 Cypress Semiconductor Corp, STK25C48-W25 Datasheet

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STK25C48-W25

Manufacturer Part Number
STK25C48-W25
Description
Manufacturer
Cypress Semiconductor Corp
Type
NVSRAMr
Datasheet

Specifications of STK25C48-W25

Word Size
8b
Organization
2Kx8
Density
16Kb
Interface Type
Parallel
Access Time (max)
25ns
Operating Supply Voltage (typ)
5V
Package Type
PDIP
Operating Temperature Classification
Commercial
Operating Supply Voltage (max)
5.5V
Operating Supply Voltage (min)
4.5V
Operating Temp Range
0C to 70C
Pin Count
24
Mounting
Through Hole
Supply Current
85mA
Lead Free Status / RoHS Status
Not Compliant
FEATURES
• Nonvolatile Storage without Battery Problems
• Directly Replaces 2K x 8 Static RAM, Battery-
• 25ns, 35ns and 45ns Access Times
• STORE to Nonvolatile Elements Initiated by
• RECALL to SRAM Initiated by Power Restore
• 10mA Typical I
• Unlimited READ, WRITE and RECALL Cycles
• 1,000,000 STORE Cycles to Nonvolatile Ele-
• 100-Year Data Retention over Full Industrial
• Commercial and Industrial Temperatures
• 24-Pin 600 PDIP Package
BLOCK DIAGRAM
March 2006
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ
A
A
A
A
A
Backed RAM or EEPROMs
AutoStore™ on Power Down
ments
Temperature Range
5
6
7
8
9
0
1
2
3
4
5
6
7
CC
at 200ns Cycle Time
A
0
COLUMN DEC
STATIC RAM
COLUMN I/O
A
32 x 512
1
ARRAY
A
2
A
3
QUANTUM TRAP
A
4
32 x 512
A
10
Obsolete - Not Recommend for new Designs
RECALL
STORE
2K x 8 AutoStore™ nvSRAM
CONTROL
RECALL
STORE/
1
DESCRIPTION
The STK25C48 is a fast
incorporated in each static memory cell. The
be read and written an unlimited number of times, while
independent nonvolatile data resides in the
Elements
tile Elements
matically on power down using charge stored in system
capacitance. Transfers from the
the
cally on restoration of power. The nv
place of existing 2K x 8
pinout of 2K x 8 battery-backed
EEPROM
performance. No support circuitry is required for micro-
processor interfacing.
SRAM
Nonvolatile Static RAM
QuantumTrap™ CMOS
CONTROL
POWER
Document Control # ML0005 rev 0.2
G
E
W
V
s, allowing direct substitution while enhancing
CC
. Data transfers from the
(the
(the
RECALL
STORE
PIN CONFIGURATIONS
PIN NAMES
DQ
DQ
DQ
SRAM
STK25C48
A
A
A
A
A
A
A
operation) take place automati-
A
A
W
DQ
E
G
V
V
SRAM
7
6
5
4
3
2
0
operation) can take place auto-
1
0
1
0
CC
SS
- A
0
- DQ
1
2
3
4
5
6
7
8
9
10
11
12
10
with a nonvolatile element
Nonvolatile Elements
s and also matches the
7
SRAM
SRAM
SRAM
24
23
22
21
20
19
18
17
16
15
14
13
Address Inputs
Write Enable
Data In/Out
Chip Enable
Output Enable
Power (+ 5V)
Ground
s,
to the
can be used in
E
DQ
DQ
DQ
DQ
V
A
W
G
A
DQ
A
EPROM
CC
10
8
9
4
3
7
6
5
Nonvolatile
SRAM
24 - 600 PDIP
Nonvola-
s and
can
to

Related parts for STK25C48-W25

STK25C48-W25 Summary of contents

Page 1

... AutoStore™ nvSRAM QuantumTrap™ CMOS Nonvolatile Static RAM Obsolete - Not Recommend for new Designs DESCRIPTION The STK25C48 is a fast incorporated in each static memory cell. The be read and written an unlimited number of times, while independent nonvolatile data resides in the Elements tile Elements matically on power down using charge stored in system capacitance ...

Page 2

... STK25C48 ABSOLUTE MAXIMUM RATINGS Voltage on Input Relative to Ground . . . . . . . . . . . . . .–0.5V to 7.0V Voltage on Input Relative –0. Voltage –0. 0-7 Temperature under Bias . . . . . . . . . . . . . . . . . . . . . –55°C to 125°C Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1W DC Output Current (1 output at a time, 1s duration 15mA DC CHARACTERISTICS ...

Page 3

... March 2006 PARAMETER ; device is continuously selected AVAV 3 t AVQV 5 t AXQX AVAV 1 t ELQV 6 t ELQX 4 t GLQV 8 t GLQX 10 t ELICCH ACTIVE 3 Document Control # ML0005 rev 0.2 STK25C48 ± 5.0V CC STK25C48-25 STK25C48-35 STK25C48-45 MIN MAX MIN MAX MIN MAX DATA VALID 11 t ...

Page 4

... ELWH 17 t AVWH 13 t WLWH 15 t DVWH DATA VALID 20 t WLQZ HIGH IMPEDANCE AVAV 14 t ELEH AVEH 13 t WLEH 15 t DVEH DATA VALID HIGH IMPEDANCE 4Document Control # ML0005 rev 0.2 ± 5.0V 10%) CC STK25C48-35 STK25C48-45 UNITS MAX MIN MAX MIN MAX ...

Page 5

... DELAY BROWN OUT AutoStore™ NO RECALL NO RECALL (V DID NOT GO DID NOT GO CC BELOW V ) RESET RESET 5 Document Control # ML0005 rev 0.2 STK25C48 (V = 5.0V ± 10%) CC STK25C48 UNITS MIN MAX 550 4.0 4.5 3 STORE BROWN OUT AutoStore™ RECALL WHEN V RETURNS CC ) ABOVE V ...

Page 6

... STK25C48 The STK25C48 is a versatile memory chip that pro- vides several modes of operation. The STK25C48 can operate as a standard Nonvolatile Elements shadow to which the information can be copied, or from which the SRAM can be updated in nonvolatile mode. SRAM NOISE CONSIDERATIONS Note that the STK25C48 is a high-speed memory and so must have a high-frequency bypass capaci- tor of approximately 0.1μ ...

Page 7

... Cycle Time (ns) Figure 2: I (max) Reads CC March 2006 100 TTL 20 CMOS 0 200 7 Document Control # ML0005 rev 0.2 STK25C48 TTL CMOS 50 100 150 200 Cycle Time (ns) Figure 3: I (max) Writes CC ...

Page 8

... STK25C48 STK25C48 March 2006 ORDERING INFORMATION - Temperature Range Access Time Lead Finish Package 8Document Control # ML0005 rev 0.2 Blank = Commercial (0 to 70° Industrial (–40 to 85° 25ns 35 = 35ns 45 = 45ns Blank = 85%Sn/15% 100% Sn (Matte Tin Plastic 24-pin 600 mil DIP ...

Page 9

... Document Revision History Date Revision December 2002 0.0 September 2003 0.1 March 2006 0.2 March 2006 Summary Removed 20 nsec device. Added lead-free lead finish Marked as Obsolete, Not recommended for new design. 9 Document Control # ML0005 rev 0.2 STK25C48 ...

Page 10

... STK25C48 March 2006 10Document Control # ML0005 rev 0.2 ...

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