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Simtek
Simtek

STK14C88 Datasheet Preview

STK14C88 Datasheet

32Kx8 AutoStore nvSRAM

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STK14C88 pdf
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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
Software Control
• 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
STK14C88
32Kx8 AutoStore nvSRAM
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.
BLOCK DIAGRAM
A5
A6
A7
A8
A9
A11
A12
A13
A14
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
Quantum Trap
512 x 512
STATIC RAM
ARRAY
512 x 512
STORE
RECALL
COLUMN I/O
COLUMN DEC
A0 A1 A2 A3 A4 A10
VCCX VCAP
POWER
CONTROL
STORE/
RECALL
CONTROL
HSB
SOFTWARE
DETECT
A0 - A13
G
E
W
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.
1 Document Control #ML0014 Rev 0.3
February 2007



Simtek
Simtek

STK14C88 Datasheet Preview

STK14C88 Datasheet

32Kx8 AutoStore nvSRAM

No Preview Available !

STK14C88 pdf
STK14C88
PIN CONFIGURATIONS
VCAP
A14
A12
A7
A6
A5
A4
A3
NC
A2
A1
A0
DQ0
DQ1
DQ2
VSS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32 VCCX
31 HSB
30 W
29 A13
28 A8
27 A9
26 A11
25 G
24 NC
23 A10
22 E
21 DQ7
20 DQ6
19 DQ5
18 DQ4
17 DQ3
32-Pin 300 mil SOIC
32-Pin 300 mil CDIP
32-Pin 450 mil LCC
PIN DESCRIPTIONS
Pin Name
A14-A0
DQ7-DQ0
E
W
G
VCCX
HSB
VCAP
VSS
Input
I/O
Input
Input
I/O
Input
Power Supply
I/O
Power Supply
Power Supply
Description
Address: The 15 address inputs select one of 32,768 bytes in the nvSRAM array
Data: Bi-directional 8-bit data bus for accessing the nvSRAM
Chip Enable: The active low E input selects the device
Write Enable: The active low W enables data on the DQ pins to be written to the address
location latched by the falling edge of E
Output Enable: The active low G input enables the data output buffers during read cycles.
De-asserting G high caused the DQ pins to tri-state.
Power: 5.0V, ± 10%
Hardware Store Busy: When low this output indicates a Store is in progress. When pulled
low external to the chip, it will initiate a nonvolatile STORE operation. A weak pull up resistor
keeps this pin high if not connected. (Connection Optional).
AutoStore Capacitor: Supplies power to nvSRAM during power loss to store data from
SRAM to nonvolatile storage elements.
Ground
Document Control #ML0014 Rev 0.3
February, 2007
2


Part Number STK14C88
Description 32Kx8 AutoStore nvSRAM
Maker Simtek
Total Page 19 Pages
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