STK15C68-SF25I SIMTEK [Simtek Corporation], STK15C68-SF25I Datasheet

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STK15C68-SF25I

Manufacturer Part Number
STK15C68-SF25I
Description
32Kx8 PowerStore nvSRAM
Manufacturer
SIMTEK [Simtek Corporation]
Datasheet
This product conforms to specifications per the
terms of Simtek standard warranty. The product
has completed Simtek internal qualification testing
and has reached production status.
FEATURES
• 25, 45 ns Read Access & R/W Cycle Time
• Unlimited Read/Write Endurance
• Pin compatible with industry standard SRAMs
• Automatic Non-volatile STORE on Power Loss
• Automatic RECALL to SRAM on Power Up
• Non-Volatile STORE or RECALL under
• Unlimited RECALL Cycles
• 1 Million Store Cycles
• 100-Year Non-volatile Data Retention
• Single 5V ± 10% Power Supply
• Commercial and Industrial Temperatures
• 28-pin 300-mil and 330 mil SOIC Packages
BLOCK DIAGRAM
Software Control
(RoHS-Compliant)
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ
A
A
A
A
A
A
A
A
A
5
6
7
8
9
11
12
13
14
0
1
2
3
4
5
6
7
A
COLUMN DEC
0
COLUMN I/O
A
STATIC RAM
1
512 X 512
A
ARRAY
2
A
3
QUANTUM TRAP
A
4
A
512 x 512
10
1
STORE
RECALL
DESCRIPTION
The Simtek STK15C88 is a 256Kb fast static RAM
with a non-volatile Quantum Trap storage element
included with each memory cell.
The SRAM provides the fast access & cycle times,
ease of use and unlimited read & write endurance of
a normal SRAM.
Data transfers automatically to the non-volatile stor-
age cells when power loss is detected (the STORE
operation). On power up, data is automatically
restored to the SRAM (the RECALL operation). Both
STORE and RECALL operations are also available
under software control.
PowerStore nvSRAM products depend on the intrin-
sic system capacitance to maintain system power
long enough for an automatic store on power loss. If
the power ramp from 5 volts to 3.6 volts is faster
than 10 ms, consider our 14C88 or 16C88 for more
reliable operation.
The Simtek nvSRAM is the first monolithic non-vola-
tile memory to offer unlimited writes and reads. It is
the highest performance, most reliable non-volatile
memory available.
CONTROL
RECALL
Document Control #ML0016 Rev 0.3
STORE/
SOFTWARE
32Kx8 PowerStore nvSRAM
DETECT
February, 2007
A
13
– A
G
STK15C88
E
W
0

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STK15C68-SF25I Summary of contents

Page 1

... The Simtek nvSRAM is the first monolithic non-vola- tile memory to offer unlimited writes and reads the highest performance, most reliable non-volatile memory available. QUANTUM TRAP ...

Page 2

STK15C88 PIN CONFIGURATIONS A14 A12 DQ0 DQ1 17 16 ...

Page 3

ABSOLUTE MAXIMUM RATINGS Voltage on Input Relative to Ground . . . . . . . . . . . . . –0.5V to 7.0V Voltage on Input Relative ...

Page 4

STK15C88 SRAM READ CYCLES #1 & #2 SYMBOLS NO. #1, #2 Alt ELQV ACS AVAV AVQV GLQV AXQX OH ...

Page 5

SRAM WRITE CYCLES #1 & #2 SYMBOLS NO Alt AVAV AVAV WLWH WLEH ELWH ELEH DVWH DVEH DW 16 ...

Page 6

STK15C88 AutoStore/POWER-UP RECALL SYMBOLS NO. Standard 22 t Power-up RECALL Duration RESTORE 23 t STORE Cycle Duration STORE 24 V Low Voltage Trigger Level SWITCH 25 V Low Voltage Reset Level RESET Note k: t starts from the time V ...

Page 7

SOFTWARE STORE/RECALL MODE SELECTION 0E38 31C7 03E0 L H 3C1F 303F 0FC0 0E38 31C7 03E0 L H 3C1F 303F 0C63 Note l: The six consecutive addresses must be in the order listed. W must ...

Page 8

... STK15C88 The STK15C88 is a versatile memory chip that pro- vides several modes of operation. The STK15C88 can operate as a standard 32K x 8 32K x 8 nonvolatile element shadow to which the information can be copied, or from which the SRAM can be updated in nonvolatile mode. SRAM NOISE CONSIDERATIONS ...

Page 9

Internally two-step procedure. First, RECALL the data is cleared, and second, the nonvola- SRAM tile information is transferred into the After the t cycle time the RECALL be ready for and READ WRITE operation in no way alters ...

Page 10

STK15C88 ORDERING INFORMATION STK15C88 - Document Control #ML0016 Rev 0.3 February, 2007 Packaging Options Blank = Tube TR = Tape and Reel Temperature Range Blank = Commercial (0 to 70° Industrial (–40 to ...

Page 11

ORDERING CODES STK15C88-SF25 5V 32Kx8 PowerStore nvSRAM SOP28-330 STK15C88-SF45 5V 32Kx8 PowerStore nvSRAM SOP28-330 STK15C88-NF25 5V 32Kx8 PowerStore nvSRAM SOP28-300 STK15C88-NF45 5V 32Kx8 PowerStore nvSRAM SOP28-300 STK15C88-SF25TR 5V 32Kx8 PowerStore nvSRAM SOP28-330 STK15C88-SF45TR 5V 32Kx8 PowerStore nvSRAM SOP28-330 STK15C88-NF25TR 5V ...

Page 12

STK15C88 28 Pin 300 mil SOIC Pin 1 Index ) 0.014 0.35 ( 0.019 0.48 0.009 0. 0.013 0.32 Document Control #ML0016 Rev 0.3 February, 2007 PACKAGE DRAWINGS 0.292 7.42 0.300 7.59 .050 (1.27) BSC 0.701 17.81 ( ...

Page 13

Pin 330 mil SOIC 0.713 0.733 0.020 0.508 ( ) 0.014 0.356 0.336 8.534 ( ) 0.326 8.280 Pin 1 0.014 0.356 ( ) 0.008 0.203 Document Control #ML0016 Rev 0.3 February, 2007 18. 18.62 0.112 (2.845) ...

Page 14

STK15C88 Document Revision History Date Revision December 2002 0.0 September 2003 0.1 March 2006 0.2 0.3 February 2007 SIMTEK STK15C88 Datasheet, February 2007 Copyright 2007, Simtek Corporation. All rights reserved. This datasheet may only be printed for the expressed use ...

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