STK12C68C35M Cypress Semiconductor Corp, STK12C68C35M Datasheet

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STK12C68C35M

Manufacturer Part Number
STK12C68C35M
Description
Manufacturer
Cypress Semiconductor Corp
Type
NVSRAMr
Datasheet

Specifications of STK12C68C35M

Word Size
8b
Organization
8Kx8
Density
64Kb
Interface Type
Parallel
Access Time (max)
35ns
Operating Supply Voltage (typ)
5V
Package Type
CDIP
Operating Temperature Classification
Military
Operating Supply Voltage (max)
5.5V
Operating Supply Voltage (min)
4.5V
Operating Temp Range
-55C to 125C
Pin Count
28
Mounting
Through Hole
Supply Current
75mA
Lead Free Status / RoHS Status
Compliant
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, 35, 45, 55 ns Read Access & Write Cycle Time
• Unlimited Read/Write Endurance
• Automatic Non-volatile STORE on Power Loss
• Non-Volatile STORE Under Hardware or Software
• 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
• 28-pin 330-mil SOIC, 300-mil PDIP, and 600-mil
• 28-Pin CDIP and LCC Military Packages
Block Diagram
Control
PDIP Packages (RoHS-Compliant)
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ
A
A
A
A
A
A
A
5
6
7
8
9
11
12
0
1
2
3
4
5
6
7
A
COLUMN DEC
0
COLUMN I/O
A
STATIC RAM
1
128 X 512
A
STK12C68, STK12C68-5 (SMD5962-94599)
ARRAY
2
A
3
QUANTUM TRAP
A
4
A
128 x 512
10
1
STORE
RECALL
DESCRIPTION
The Simtek STK12C68 is a 64Kb 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
CONTROL
cc
CONTROL
RECALL
STORE/
POWER
Document Control #ML0008 Rev 2.0
V
CAP
SOFTWARE
DETECT
June, 2008
8Kx8 AutoStore nvSRAM
A
0
– A
G
E
W
12

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STK12C68C35M Summary of contents

Page 1

FEATURES • 25, 35, 45 Read Access & Write Cycle Time • Unlimited Read/Write Endurance • Automatic Non-volatile STORE on Power Loss • Non-Volatile STORE Under Hardware or Software Control • Automatic RECALL to SRAM on Power Up ...

Page 2

STK12C68, STK12C68-5 (SMD5962-94599) Packages ...

Page 3

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

Page 4

STK12C68, STK12C68-5 (SMD5962-94599) SRAM READ CYCLES #1 & #2 SYMBOLS NO. #1, #2 Alt Chip Enable Access Time ELQV ACS Read Cycle Time AVAV , ELEH ...

Page 5

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

Page 6

STK12C68, STK12C68-5 (SMD5962-94599) HARDWARE MODE SELECTION E W HSB Note m: HSB STORE operation occurs only if an SRAM WRITE ...

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 s: t starts from the time V RESTORE μs Note t: ...

Page 8

STK12C68, STK12C68-5 (SMD5962-94599) SOFTWARE-CONTROLLED STORE/RECALL CYCLE SYMBOLS NO. Standard Alternate STORE/RECALL Initiation Cycle Time AVAV Address Set-up Time AVEL Clock Pulse Width ELEH Address Hold Time ...

Page 9

The STK12C68, STK12C68-5 has two separate modes of operation: SRAM mode. In mode, the memory operates as a SRAM standard fast static . In nonvolatile mode, data RAM is transferred from to Nonvolatile Elements SRAM (the operation) or from Nonvolatile ...

Page 10

STK12C68, STK12C68-5 (SMD5962-94599) 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: ...

Page 11

HSB OPERATION The STK12C68, STK12C68-5 provides the HSB pin for controlling and acknowledging the tions. The HSB pin is used to request a hardware cycle. When the HSB pin is driven low, the STORE STK12C68, STK12C68-5 will conditionally initiate a ...

Page 12

STK12C68, STK12C68-5 (SMD5962-94599) 100 100 Cycle Time (ns) Figure 4: I (max) Reads cc BEST PRACTICES nvSRAM products have been used effectively for over 15 years. While ease-of-use is one of the product’s main ...

Page 13

COMMERCIAL AND INDUSTRIAL ORDERING INFORMATION STK12C68 - Document Control #ML0008 Rev 2.0 June, 2008 STK12C68, STK12C68-5 (SMD5962-94599) Packing Option Blank = Tube TR = Tape and Reel Temperature Range Blank = Commercial (0 to 70°C) ...

Page 14

STK12C68, STK12C68-5 (SMD5962-94599) MILITARY ORDERING INFORMATION STK12C68 - 5962 - 94599 Document Control #ML0008 Rev 2.0 June, 2008 Temperature Range M = Military (–55 to 125°C) Access Time 35 = 35ns 55 = ...

Page 15

ORDERING INFORMATION Part Number STK12C68-C35 STK12C68-C45 STK12C68-L35 STK12C68-L45 STK12C68-PF25 STK12C68-PF45 STK12C68-SF25 STK12C68-SF25TR STK12C68-SF45 STK12C68-SF45TR STK12C68-WF25 STK12C68-WF45 STK12C68-C35I STK12C68-C45I STK12C68-L35I STK12C68-L45I STK12C68-PF25I STK12C68-PF45I STK12C68-SF25I STK12C68-SF25ITR STK12C68-SF45I STK12C68-SF45ITR STK12C68-WF25I STK12C68-WF45I SMD5962-9459901MXA SMD5962-9459901MXC SMD5962-9459901MXX SMD5962-9459901MYA SMD5962-9459901MYX SMD5962-9459903MXA SMD5962-9459903MXC SMD5962-9459903MXX SMD5962-9459903MYA SMD5962-9459903MYX STK12C68-5C35M STK12C68-5C55M ...

Page 16

STK12C68, STK12C68-5 (SMD5962-94599) 28-Lead, 330 mil SOIC Gull Wing 0.020 ( 0.014 0.336 8.534 ( ) 0.326 8.280 Pin 1 0.014 0.356 ( 0.008 0.203 Document Control #ML0008 Rev 2.0 June, 2008 Package Diagrams 0.713 18. 0.733 18.62 ...

Page 17

PDIP Pin 1 Index ( ) .020 0.51 .030 0. ---- ---- 4.57 .180 ( ) .030 0.76 .045 1.14 Document Control #ML0008 Rev 2.0 June, 2008 STK12C68, STK12C68-5 (SMD5962-94599 1.345 34.16 1.385 ...

Page 18

STK12C68, STK12C68-5 (SMD5962-94599) 28-Lead, 600 mil PDIP Pin 1 Index 0.040 ( ) 1.02 0.050 1.27 ---- ---- (4.57) .180 Document Control #ML0008 Rev 2.0 June, 2008 1.440 ( 36.58 ) 1.460 37.08 0.014 0.36 ( ...

Page 19

Side Braze DIL ( ) --- --- .060 1. 3.15 .124 4.14 .162 .016 .020 ( ) .290 .310 .300 7. .320 8.13 Document Control #ML0008 Rev 2.0 June, 2008 STK12C68, STK12C68-5 (SMD5962-94599) ...

Page 20

STK12C68, STK12C68-5 (SMD5962-94599) 28-Pad, 350 mil Ceramic LCC ο (1.02) 0.040 REF places ο (0.51) 0.020 REF X 45 (0.23) 0.009 REF 28 places 0.006 0.022 0.022 0.028 ( 0. 0.56 ) 0.56 0.71 --- ...

Page 21

Document Revision History Date Summary Revision December 2002 Combined commercial, industrial and military data sheets. Removed 20 nsec device. 0.0 January 2003 Added 35ns SMD to order information 0.1 July 2003 Added “28 - SOIC” label to page 1 pinout ...

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