STK16C68-W45I Cypress Semiconductor Corp, STK16C68-W45I Datasheet

STK16C68-W45I

Manufacturer Part Number
STK16C68-W45I
Description
Manufacturer
Cypress Semiconductor Corp
Type
NVSRAMr
Datasheet

Specifications of STK16C68-W45I

Word Size
8b
Organization
8Kx8
Density
64Kb
Interface Type
Parallel
Access Time (max)
45ns
Operating Supply Voltage (typ)
5V
Package Type
PDIP
Operating Temperature Classification
Industrial
Operating Supply Voltage (max)
5.5V
Operating Supply Voltage (min)
4.5V
Operating Temp Range
-40C to 85C
Pin Count
28
Mounting
Through Hole
Supply Current
65mA
Lead Free Status / RoHS Status
Not Compliant
FEATURES
• Internal Capacitor Guarantees AutoStore™
• Nonvolatile Storage without Battery Problems
• Directly Replaces 8K x 8 Static RAM, Battery-
• 25ns, 35ns and 45ns Access Times
• STORE to Nonvolatile Elements Initiated by
• RECALL to SRAM Initiated by Software or
• 10mA Typical I
• Unlimited READ, WRITE and RECALL Cycles
• 1,000,000 STORE Cycles to Nonvolatile Ele-
• 100-Year Data Retention over Full Industrial
• No Data Loss from Undershoot
• Commercial and Industrial Temperatures
• 28-Pin 600 mil PDIP Package
BLOCK DIAGRAM
March 2006
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ
Regardless of Power-Down Slew Rate
Backed RAM or EEPROM
Software or AutoStorePlus™ on Power Down
Power Restore
ments
Temperature Range
A
A
A
A
A
A
A
5
6
7
8
9
11
12
0
1
2
3
4
5
6
7
CC
at 200ns Cycle Time
A
0
COLUMN DEC
STATIC RAM
COLUMN I/O
A
128 x 512
1
ARRAY
A
2
A
3
QUANTUM TRAP
A
4
128 x 512
A
10
Obsolete - Not Recommend for new Designs
RECALL
STORE
8K x 8 AutoStorePlus™ nvSRAM
CONTROL
RECALL
STORE/
1
SOFTWARE
DESCRIPTION
The STK16C68 is a fast
ment incorporated in each static memory cell. The
SRAM
times, while independent nonvolatile data resides in
Nonvolatile Elements. Data transfers from the
the Nonvolatile Elements (the
take place automatically on power down. An internal
capacitor guarantees the
of power-down slew rate. Transfers from the Nonvola-
tile Elements to the
place automatically on restoration of power. Initiation
of
entering control sequences on the
STK16C68 is pin-compatible with 8k x 8
battery-backed
while enhancing performance. The STK12C68, which
uses an external capacitor, and the STK15C68, which
uses charge stored in system capacitance, are alter-
natives for systems needing AutoStore™ operation.
DETECT
STORE
Nonvolatile Static RAM
QuantumTrap™ CMOS
CAPACITOR
CONTROL
INTERNAL
can be read and written an unlimited number of
POWER
Document Control # ML0010 rev 0.2
G
E
W
V
CC
and
A
RECALL
0
- A
SRAM
12
SRAM
PIN CONFIGURATIONS
PIN NAMES
DQ
DQ
DQ
V
s, allowing direct substitution
A
NC
cycles can also be controlled by
A
A
A
A
A
A
A
A
SS
12
STK16C68
2
7
6
5
4
3
1
0
0
2
1
A
W
DQ
E
G
V
V
0
CC
SS
SRAM
STORE
(the
- A
1
2
3
4
5
6
7
8
9
10
11
12
13
14
0
- DQ
12
RECALL
7
STORE
with a nonvolatile ele-
28
27
26
25
24
23
22
21
20
19
18
17
16
15
operation regardless
SRAM
E
DQ
DQ
DQ
DQ
DQ
V
NC
A
A
A
G
A
W
Address Inputs
Write Enable
Data In/Out
Chip Enable
Output Enable
Power (+ 5V)
Ground
CC
8
9
11
10
7
6
5
4
3
operation) take
operation) can
28 - 600 PDIP
SRAM
inputs. The
SRAM
s and
to

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STK16C68-W45I Summary of contents

Page 1

... Elements to the place automatically on restoration of power. Initiation of STORE entering control sequences on the STK16C68 is pin-compatible with battery-backed while enhancing performance. The STK12C68, which uses an external capacitor, and the STK15C68, which uses charge stored in system capacitance, are alter- natives for systems needing AutoStore™ operation. ...

Page 2

... STK16C68 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 # ML0010 rev 0.2 STK16C68 ± 5.0V CC STK16C68-25 STK16C68-35 STK16C68-45 MIN MAX MIN MAX MIN MAX DATA VALID 11 t ...

Page 4

... 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 4 Document Control # ML0010 rev 0.2 ± 5.0V 10%) CC STK16C68-35 STK16C68-45 UNITS MAX MIN MAX MIN MAX WHAX ...

Page 5

... SWITCH BROWN OUT AutoStorePlus™ NO RECALL NO RECALL DID NOT GO (V DID NOT GO CC BELOW V ) RESET RESET 5 Document Control # ML0010 rev 0.2 STK16C68 ± 5.0V CC STK16C68 UNITS MIN MAX μs 550 500 ns 4.0 4 stg BROWN OUT AutoStorePlus™ RECALL WHEN V ...

Page 6

... Output Data Output High Z Output High Z Output High Z Output Data Output High Z Output Data Output High Z Output Data Output High Z Output Data Output High Z Output Data Output High Z Output High Z Output High Z = 5.0V ± 10 STK16C68-35 STK16C68-45 MAX MIN MAX MIN MAX ...

Page 7

... The AutoStorePlus™ STK16C68 is a fast SRAM that does not lose its data on power-down. The data is preserved in integral QuantumTrap™ Nonvolatile Elements while power is unavailable. The nonvolatility of the STK16C68 does not require any system intervention or support: AutoStore- Plus™ on power-down and automatic RECALL on power-up guarantee data integrity without the use of batteries ...

Page 8

... WRITE less than 100%, only standby current is drawn Valid READ when the chip is disabled. The overall average cur- Valid READ rent drawn by the STK16C68 depends on the fol- Valid READ Valid READ lowing items: 1) Valid READ duty cycle of chip enable; 3) the overall cycle rate Initiate RECALL cycle for accesses ...

Page 9

... STK16C68 March 2006 ORDERING INFORMATION - Temperature Range Access Time Lead Finish Package 9 Document Control # ML0010 rev 0.2 STK16C68 Blank = Commercial (0 to 70° Industrial (–40 to 85° 25ns 35 = 35ns 45 = 45ns Blank = 85%Sn/15% 100% Sn (Matte Tin Plastic 28-pin 600 mil DIP ...

Page 10

Document Revision History Date Revision December 2002 0.0 September 2003 0.1 March 2006 0.2 Summary Publish new datasheet Added lead-free lead finish Marked as Obsolete, Not recommended for new design. ...

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