STK14C88_08 SIMTEK [Simtek Corporation], STK14C88_08 Datasheet

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STK14C88_08

Manufacturer Part Number
STK14C88_08
Description
32Kx8 AutoStore 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.
BLOCK DIAGRAM
FEATURES
• 25, 35, 45 ns Read Access & R/W Cycle Time
• Unlimited Read/Write Endurance
• Automatic Non-volatile STORE on Power Loss
• Non-Volatile STORE Under Hardware or
• Automatic RECALL to SRAM on Power Up
• Unlimited RECALL Cycles
• 1 Million STORE Cycles
• 100-Year Non-volatile Data Retention
• Single 5V +10% Power Supply
• Commercial, Industrial, Military Temperatures
• 32-Pin 300 mil SOIC (RoHS-Compliant)
• 32-pin CDIP and LCC Packages
Software Control
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
STATIC RAM
COLUMN I/O
0
512 x 512
A
ARRAY
1
A
2
A
3
A
Quantum Trap
4
512 x 512
A
10
RECALL
STORE
1
DESCRIPTION
The Simtek STK14C88 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.
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.
V
CCX
CONTROL
CONTROL
RECALL
POWER
STORE/
Document Control #ML0014 Rev 2.0
V
CAP
SOFTWARE
DETECT
Feb, 2008
32Kx8 AutoStore nvSRAM
A
0
HSB
G
E
W
- A
STK14C88
13

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STK14C88_08 Summary of contents

Page 1

... SRAM (the RECALL operation). Both STORE and RECALL operations are also available under software control. 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. V Quantum Trap ...

Page 2

STK14C88 PIN CONFIGURATIONS V CAP (TOP ...

Page 3

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

Page 4

STK14C88 SRAM READ CYCLES #1 & #2 SYMBOLS NO. #1, #2 Alt Chip Enable Access Time ELQV ACS Read Cycle Time AVAV , ELEH Address Access ...

Page 5

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

Page 6

STK14C88 HARDWARE MODE SELECTION E W HSB Note m: HSB STORE operation occurs only if an SRAM WRITE has been done since the last nonvolatile cycle. After ...

Page 7

AutoStore™/POWER-UP RECALL SYMBOLS NO. Standard Alternate 27 t RESTORE STORE HLHZ 29 t VSBL DELAY BLQZ 31 V SWITCH 32 V RESET Note p: t starts from the time V RESTORE μ s Note ...

Page 8

STK14C88 SOFTWARE STORE/RECALL MODE SELECTION (hex 0E38 31C7 L H 03E0 3C1F 303F 0FC0 0E38 31C7 03E0 L H 3C1F 303F 0C63 SOFTWARE-CONTROLLED STORE/RECALL CYCLE SYMBOLS NO. Standard Alternate STORE ...

Page 9

... goes high at the end of the cycle. The data on the common I/O pins DQ will be written into the memory valid t 0-7 before the end controlled before the end controlled It is recommended that G be kept high during the ...

Page 10

STK14C88 SOFTWARE NONVOLATILE RECALL A software cycle is initiated with a sequence RECALL of operations in a manner similar to the soft- READ ware initiation. To initiate the STORE the following sequence of E tions must be performed: 1. Read ...

Page 11

... AA, 55, 00, FF, A5, or 5A. End product’s firmware should not assume an NV array set programmed state. Routines that check memory content val- ues to determine first time system configuration, cold or warm boot status, etc. should always pro- gram a unique NV pattern (e ...

Page 12

STK14C88 • Power up boot firmware routines should rewrite the nvSRAM into the desired state (autostore enabled, etc.). While the nvSRAM is shipped in a preset state, best practice is to again rewrite the nvSRAM into the desired state as ...

Page 13

Commercial and Industrial Ordering Information STK14C88 - Document Control #ML0014 Rev 2.0 Feb, 2008 Packaging Option Blank = Tube TR = Tape and Reel Temperature Range Blank = Commercial (0 to 70° Industrial ...

Page 14

STK14C88 STK14C88 - Document Control #ML0014 Rev 2.0 Feb, 2008 Military Ordering Information Temperature Range Access Time Package Retention / Endurance Military (-55 to 125° 35ns 45 = 45ns L=Ceramic 32-pad ...

Page 15

Ordering Information Part Number STK14C88-NF25 5V 32Kx8 AutoStore nvSRAM SOP32-300 STK14C88-NF35 5V 32Kx8 AutoStore nvSRAM SOP32-300 STK14C88-NF45 5V 32Kx8 AutoStore nvSRAM SOP32-300 STK14C88-NF25TR 5V 32Kx8 AutoStore nvSRAM SOP32-300 STK14C88-NF35TR 5V 32Kx8 AutoStore nvSRAM SOP32-300 STK14C88-NF45TR 5V 32Kx8 AutoStore nvSRAM SOP32-300 ...

Page 16

STK14C88 32 Lead 300 mil SOIC Gull Wing Pin 1 Index 0.026 0.66 ( 0.032 0.81 0.12 0. 0.014 0.36 0.020 0.51 0.006 ( ) 0.013 Document Control #ML0014 Rev 2.0 Feb, 2008 Package Diagrams 0.810 20.57 ( ...

Page 17

Lead 300 mil Side Braze DIL Pin 1 Index ( ) --- --- .060 1.52 ( .124 3.15 ) .162 4.12 .016 .020 Document Control #ML0014 Rev 2.0 Feb, 2008 ( ) 1.585 40.25 1.615 41. ...

Page 18

STK14C88 32 Lead 450 mil Ceramic LCC Pad 32 Pad 1 C.020±.010 TYP .050±.005 .450-.010 (R.009) (C.004) .025±.003 .050 .400 [P=.050X8] Document Control #ML0014 Rev 2.0 Feb, 2008 .550±.005 +.005 NOTES: Pad 1 Index Pad 32 1. GOLD PLATE 85~220‚ ...

Page 19

Document Revision History Date Revision 0.0 December 2002 0.1 September 2003 0.2 March 2003 0.3 February 2007 0.4 July 2007 2.0 February 2008 SIMTEK STK14C88 Datasheet, February 2008 Copyright 2008, Simtek Corporation. All rights reserved. This datasheet may only be ...

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