stk14c88-n25m Simtek Corporation, stk14c88-n25m Datasheet

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stk14c88-n25m

Manufacturer Part Number
stk14c88-n25m
Description
32kx8 Autostore Nvsram
Manufacturer
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-n25m Summary of contents

Page 1

... Simtek standard warranty. The product has completed Simtek internal qualification testing and has reached production status. 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 & ...

Page 2

... STK14C88 PIN CONFIGURATIONS V CAP (TOP 32-Pin 300 mil SOIC 32-Pin 300 mil CDIP PIN DESCRIPTIONS Pin Name I Input ...

Page 3

... STK14C88 Ratings” may cause permanent damage to the device. This is a stress rating only, and functional operation of the device at con- ditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rat- ing conditions for extended periods may affect reliability. ...

Page 4

... ELQ ELI IVE ST AND 5.0V ± 10 STK14C88-25 STK14C88-35 STK14C88-45 MIN MAX MIN MAX MIN ...

Page 5

... DATA VALID 20 t WLQZ HIGH IMPEDANCE AVAV 14 t ELEH 17 t AVEH 13 t WLEH 15 t DVEH HIGH IMPEDANCE 5 STK14C88 = 5.0V ± 10 STK14C88-25 STK14C88-35 STK14C88-45 MIN MAX MIN MAX MIN MAX ...

Page 6

... STORE 26 t HLBL 23 t DELAY DATA VALID 6 I/O POWER Output High Z Standby Output Data Active Input Data Active Output High 5.0V ± 10 STK14C88 UNITS MIN MAX 10 ms μ 700 300 RECOVER HIGH IMPEDANCE DATA VALID NOTES ...

Page 7

... DELAY BROWN OUT BROWN OUT NO STORE AutoStore (NO SRAM WRITES) NO RECALL NO RECALL (V DID NOT GO (V DID NOT BELOW V ) BELOW V RESET 7 STK14C88 = 5.0V ± 10 STK14C88 UNITS MIN MAX 550 10 300 1 4.0 4.5 3 STORE BROWN OUT AutoStore RECALL WHEN V RETURNS CC ) ABOVE V RESET SWITCH e NOTES μ ...

Page 8

... Note r: The six consecutive addresses must be in the order listed. W must be high during all six consecutive E controlled cycles to enable a nonvolatile cycle. Note s: While there are 15 addresses on the STK14C88, only the lower 14 are used to control software modes. Note t: I/O state assumes G < Activation of nonvolatile cycles does not depend on state of G. ...

Page 9

... The STK14C88 has two separate modes of opera- tion: mode and nonvolatile mode. In SRAM mode, the memory operates as a standard fast static . In nonvolatile mode, data is transferred RAM from to nonvolatile elements (the SRAM operation) or from nonvolatile elements to (the operation). In this mode RECALL tions are disabled. ...

Page 10

... WRITE operation in no way alters the data in the nonvolatile elements. The nonvolatile data can be recalled an unlimited number of times. AutoStore MODE The STK14C88 can be powered in one of three modes. During normal AutoStore operation, the STK14C88 will draw current from V to charge a capacitor con- ...

Page 11

... Figure 2: AutoStore Inhibit Mode HSB OPERATION The STK14C88 provides the HSB pin for controlling and acknowledging the STORE pin can be used to request a hardware When the HSB pin is driven low, the STK14C88 will conditionally initiate a STORE an actual cycle will only begin if a STORE ...

Page 12

... and V crosses V CAP CC SWITCH the STK14C88 will attempt to pull HSB low; if HSB doesn’t actually get below V ing to pull HSB low and abort the HARDWARE PROTECT The STK14C88 offers hardware protection against inadvertent operation and STORE ing low-voltage conditions. When V ...

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 (-40 to 85°C) Access Time 25 = 25ns 35 = 35ns 45 = 45ns Lead Finish F = 100% Sn (Matte Tin) Package ...

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 LCC C=Ceramic 32-pin 300 mil CDIP K=Ceramic 32-pin 300 mil CDIP with solder dip finish ...

Page 15

... STK14C88-NF35ITR 5V 32Kx8 AutoStore nvSRAM SOP32-300 STK14C88-NF45ITR 5V 32Kx8 AutoStore nvSRAM SOP32-300 STK14C88-C45I 5V 32Kx8 AutoStore nvSRAM CDIP32-300 STK14C88-5L35M 5V 32Kx8 AutoStore nvSRAM LCC32-450 STK14C88-5L45M 5V 32Kx8 AutoStore nvSRAM LCC32-450 STK14C88-5C35M 5V 32Kx8 AutoStore nvSRAM CDIP32-300 STK14C88-5C45M 5V 32Kx8 AutoStore nvSRAM CDIP32-300 STK14C88-5K35M 5V 32Kx8 AutoStore nvSRAM CDIP32-300 STK14C88-5K45M 5V 32Kx8 AutoStore nvSRAM CDIP32-300 Document Control #ML0014 Rev 2 ...

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. 0.822 20.88 ) 0.15 0.32 MIN DIM = INCHES MAX ( MIN ) DIM = mm MAX 16 0.292 7. 0.300 7.60 0.405 10.29 ( 0.419 10.64 .050 (1.27) BSC 0.090 2. 0.100 2. 2.18 0.086 ...

Page 17

... Document Control #ML0014 Rev 2.0 Feb, 2008 ( ) 1.585 40.25 1.615 41. 0.41 .048 1.22 0.51 .052 1. .290 7.37 .310 7.87 .009 .012 ( ) .300 7.62 .320 8.13 MIN DIM = INCHES MAX ( MIN ) DIM = mm MAX 17 STK14C88 .280 .310 PIN 16 .125 (3.18) MIN .090 ( 2.29 ) .110 2. 0.23 0. 7.36 7.87 .040 .060 ( ) 1.02 1.52 ...

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‚ INCHES OVER 50~350 INCHES NICKEL. ...

Page 19

... Page 8: in Software Store/Recall Mode Selection table, added footnote n to both rows. Page 11: added best practices section. Under HSB Operation, revised first paragraph to read “The HSB pin has a very resistive pullup...” Page 15: added access times column to the Ordering codes; removed STK14C88-L45I row from the Ordering Information page. 19 STK14C88 ...

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