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STK20C04-W25 Folha de dados(PDF) 1 Page - Simtek Corporation

Nome de Peças STK20C04-W25
Descrição Electrónicos  512 x 8 nvSRAM QuantumTrap??CMOS Nonvolatile Static RAM
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Fabricante Electrônico  SIMTEK [Simtek Corporation]
Página de início  http://www.simtek.com
Logo SIMTEK - Simtek Corporation

STK20C04-W25 Folha de dados(HTML) 1 Page - Simtek Corporation

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March 2006
1
Document Control # ML0001 rev 0.2
STK20C04
512 x 8 nvSRAM
QuantumTrap™ CMOS
Nonvolatile Static RAM
Obsolete - Not Recommend for new Designs
DESCRIPTION
The Simtek STK20C04 is a fast static RAM with a non-
volatile element incorporated in each static memory
cell. The SRAM can be read and written an unlimited
number of times, while independent nonvolatile data
resides in nonvolatile elements. Data may easily be
transferred from the SRAM to the Nonvolatile Elements
(the STORE operation), or from the Nonvolatile Ele-
ments to the SRAM (the RECALL operation), using the
NE pin. Transfers from the Nonvolatile Elements to the
SRAM
(the RECALL operation) also take place auto-
matically on restoration of power. The STK20C04
combines the high performance and ease of use of a
fast SRAM with nonvolatile data integrity.
The STK20C04 features industry-standard pinout for
nonvolatile RAMs in a 28-pin 600 mil plastic DIP.
BLOCK DIAGRAM
Quantum Trap
16 x 256
STORE
RECALL
COLUMN I/O
COLUMN DEC
STATIC RAM
ARRAY
16 x 256
STORE/
RECALL
CONTROL
A7
A8
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
G
E
W
A6
A5
A3
A2
A0 A1
NE
A4
PIN NAMES
A0 - A8
Address Inputs
W
Write Enable
DQ0 - DQ7
Data In/Out
E
Chip Enable
G
Output Enable
NE
Nonvolatile Enable
VCC
Power (+ 5V)
VSS
Ground
PIN CONFIGURATIONS
NE
NC
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
DQ1
DQ2
VSS
VCC
NC
A8
NC
NC
G
W
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
NC
E
DQ7
DQ6
DQ5
DQ4
DQ3
28 - 600 PDIP
FEATURES
• 25ns, 35ns and 45ns Access Times
• STORE to Nonvolatile Elements Initiated by
Hardware
• RECALL to SRAM Initiated by Hardware or
Power Restore
• Automatic STORE Timing
• 10mA Typical I
CC at 200ns Cycle Time
• Unlimited READ, WRITE and RECALL Cycles
• 1,000,000 STORE Cycles to Nonvolatile Ele-
ments
• 100-Year Data Retention over Full Industrial
Temperature Range
• Commercial and Industrial Temperatures


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