stk16c88-45i Simtek Corporation, stk16c88-45i Datasheet

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stk16c88-45i

Manufacturer Part Number
stk16c88-45i
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.
FEATURES
• 25, 45 ns Read Access & R/W Cycle Time
• Unlimited Read/Write Endurance
• Directly replaces battery-backed SRAM mod-
• 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 and Industrial Temperatures
• 28-pin 600-mil PDIP Package (RoHS-Compliant)
BLOCK DIAGRAM
ules such as Dallas/Maxim DS1230 AB
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
0
COLUMN I/O
A
STATIC RAM
1
512 X 512
A
ARRAY
2
A
3
QUANTUM TRAP
A
4
A
512 x 512
1
10
STORE
RECALL
DESCRIPTION
The Simtek STK16C88 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.
Document Control #ML0018 Rev 2.0
CONTROL
RECALL
STORE/
32Kx8 AutoStore+ nvSRAM
Jan, 2008
SOFTWARE
DETECT
STK16C88
A
13
– A
G
E
W
0

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stk16c88-45i Summary of contents

Page 1

... Simtek standard warranty. The product has completed Simtek internal qualification testing and has reached production status. DESCRIPTION The Simtek STK16C88 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

... STK16C88 PIN CONFIGURATIONS (TOP Pin 600 mil PDIP PIN CONFIGURATIONS Pin Name I Input -DQ I Input W Input G Input ...

Page 3

... V – 2.4 2.4 0 – 40 ° 1.0MHz) MAX UNITS CONDITIONS Δ Δ OUTPUT 3 STK16C88 (V = 5.0V CC UNITS NOTES MAX 100 25ns AVAV 45ns AVAV 3 mA All Inputs Don’t Care ≥ (V – 0.2V ...

Page 4

... ELQ ELI IVE ST AND BY 4 ± 5.0V CC STK16C88-25 STK16C88-45 UNITS MIN MAX MIN MAX ...

Page 5

... WLWH 15 t DVWH 20 t WLQZ HIGH IMPEDANCE AVAV 14 t ELEH 17 t AVEH 13 t WLEH 15 t DVEH HIGH IMPEDANCE 5 STK16C88 (V = 5.0V CC STK16C88-25 STK16C88-45 MIN MAX MIN WHAX 16 t WHDX DATA VALID 21 ...

Page 6

... STORE BROWN OUT BROWN OUT NO STORE DUE TO AutoStorePluse NO SRAM WRITES NO RECALL NO RECALL (V DID NOT GO (V DID NOT BELOW V BELOW V ) RESET 5.0V CC STK16C88 UNITS NOTES MIN MAX 550 500 4.0 4.5 3 stg BROWN OUT AutoStorePluse RECALL WHEN V RETURNS CC ) ABOVE V RESET SWITCH ± ...

Page 7

... Note l: The six consecutive addresses must be in the order listed. W must be high during all six consecutive E controlled cycles to enable a nonvola- tile cycle. Note m: While there are 15 addresses on the STK16C88, only the lower 14 are used to control software modes. SOFTWARE STORE/RECALL CYCLE NO. ...

Page 8

... initiated and will take t ELQV cycle #2). The data If the STK16C88 WRITE state at the end of power-up RECALL, the SRAM data will be cor- rupted. To help avoid this situation, a 10kΩ resistor should be connected either between W and system V or between E and system V ...

Page 9

... Figure 3 shows the same relationship for WRITE RECALL than 100%, only standby current is drawn when the operations chip is disabled. The overall average current drawn READ by the STK16C88 depends on the following items: 1) CMOS Valid READ chip enable; 3) the overall cycle rate for accesses; Valid READ 4) the ratio of ...

Page 10

... STK16C88 BEST PRACTICES nvSRAM products have been used effectively for over 15 years. While ease-of-use is one of the prod- uct’s main system values, experience gained work- ing with hundreds of applications has resulted in the following suggestions as best practices: • The non-volatile cells in an nvSRAM are pro- grammed on the test floor during final test and quality assurance ...

Page 11

... ORDERING INFORMATION STK16C88 - ORDERING CODES Part Number STK16C88-WF25 5V 32Kx8 AutoStore+ nvSRAM PDIP28-600 STK16C88-WF45 5V 32Kx8 AutoStore+ nvSRAM PDIP28-600 STK16C88-WF25I 5V 32Kx8 AutoStore+ nvSRAM PDIP28-600 STK16C88-WF45I 5V 32Kx8 AutoStore+ nvSRAM PDIP28-600 Document Control #ML0018 Rev 2.0 Jan, 2008 Temperature Range Blank = Commercial (0 to 70° Industrial (– ...

Page 12

... STK16C88 28 Pin 600 mil PDIP Pin 1 Index 0.040 ( ) 1.02 0.050 1.27 ---- ---- (4.57) .180 0.595 0.625 0.600 0.660 Document Control #ML0018 Rev 2.0 Jan, 2008 PACKAGE DRAWING Darla 1.440 ( 36.58 ) 1.460 37.08 0.014 0. 0.045 1. 0.56 0.022 0.060 1.52 15. 15.88 0.008 ( 0.20 ) 0.38 0.015 ) ( 15.24 16.76 12 0.530 ( 13.46 ) 0.550 13.97 Darla 0.015 (0.38) ---- ---- 0.125 (3.18) MIN 0.10 (2.54) BSC MIN ...

Page 13

... July 2007 2.0 January 2008 SIMTEK STK16C88 Datasheet, January 2008 Copyright 2008, Simtek Corporation. All rights reserved. This datasheet may only be printed for the expressed use of Simtek Customers. No part of the datasheet may be reproduced in any other form or means without the express written permission from Simtek Corporation. The information contained in this publication is believed to be accurate, but changes may be made without notice ...

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