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Simtek
Simtek

STK15C88 Datasheet Preview

STK15C88 Datasheet

32Kx8 PowerStore nvSRAM

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STK15C88 pdf
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FEATURES
• 25, 45 ns Read Access & R/W Cycle Time
• Unlimited Read/Write Endurance
• Pin compatible with industry standard SRAMs
• Automatic Non-volatile STORE on Power Loss
• Automatic RECALL to SRAM on Power Up
• Non-Volatile STORE or RECALL under
Software Control
• Unlimited RECALL Cycles
• 1 Million Store Cycles
• 100-Year Non-volatile Data Retention
• Single 5V ± 10% Power Supply
• Commercial and Industrial Temperatures
• 28-pin 300-mil and 330 mil SOIC Packages
(RoHS-Compliant)
STK15C88
32Kx8 PowerStore nvSRAM
DESCRIPTION
The Simtek STK15C88 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.
PowerStore nvSRAM products depend on the intrin-
sic system capacitance to maintain system power
long enough for an automatic store on power loss. If
the power ramp from 5 volts to 3.6 volts is faster
than 10 ms, consider our 14C88 or 16C88 for more
reliable operation.
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
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
STORE/
RECALL
CONTROL
SOFTWARE
DETECT
A13 – A0
G
E
W
Document Control #ML0016 Rev 0.3
February, 2007



Simtek
Simtek

STK15C88 Datasheet Preview

STK15C88 Datasheet

32Kx8 PowerStore nvSRAM

No Preview Available !

STK15C88 pdf
STK15C88
PIN CONFIGURATIONS
A14 1
28 VCC
A12 2
A7 3
27 W
26 A13
A6 4
25 A8
A5 5
A4 6
A3 7
A2 8
A1 9
24 A9
23 A11
22 G
21 A10
20 E
A0 10
DQ0 11
19 DQ7
18 DQ6
DQ1 12
17 DQ5
DQ2 13
VSS 14
16 DQ4
15 DQ3
28 Pin 300 mil SOIC
28 Pin 330 mil SOIC
PIN NAMES
Pin Name
A14-A0
DQ7-DQ0
E
W
Input
I/O
Input
Input
I/O
G Input
VCC Power Supply
VSS 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%
Ground
Document Control #ML0016 Rev 0.3
February, 2007
2


Part Number STK15C88
Description 32Kx8 PowerStore nvSRAM
Maker Simtek
Total Page 14 Pages
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