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STK15C68-SF35I bảng dữ liệu(PDF) 1 Page - Simtek Corporation

tên linh kiện STK15C68-SF35I
Giải thích chi tiết về linh kiện  8K x 8 AutoStore??nvSRAM QuantumTrap??CMOS Nonvolatile Static RAM
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nhà sản xuất  SIMTEK [Simtek Corporation]
Trang chủ  http://www.simtek.com
Logo SIMTEK - Simtek Corporation

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March 2006
1
Document Control # ML0009 rev 0.2
STK15C68
8K x 8 AutoStore™ nvSRAM
QuantumTrap™ CMOS
Nonvolatile Static RAM
Obsolete - Not Recommend for new Deisgns
FEATURES
• Nonvolatile Storage without Battery Problems
• Directly Replaces 8K x 8 Static RAM, Battery-
Backed RAM or EEPROM
• 25ns, 35ns and 45ns Access Times
• STORE to Nonvolatile Elements Initiated by
Software or AutoStore™ on Power Down
• RECALL to SRAM Initiated by Software or
Power Restore
• 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
• No Data Loss from Undershoot
• Commercial and Industrial Temperatures
• 28-Pin 600 or 300 mil PDIP and 350 mil SOIC
Packages
DESCRIPTION
The STK15C68 is a fast SRAM with a nonvolatile ele-
ment 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 transfers from the SRAM to
the Nonvolatile Elements (the STORE operation) can
take place automatically on power down using charge
stored in system capacitance. Transfers from the Non-
volatile Elements to the SRAM (the RECALL operation)
take place automatically on restoration of power. Initia-
tion of STORE and RECALL cycles can also be con-
trolled by entering control sequences on the SRAM
inputs. The STK15C68 is pin-compatible with 8k x 8
SRAM
s and battery-backed SRAMs, allowing direct
substitution while enhancing performance. A similar
device (STK16C68) with an internally integrated
capacitor is available for systems with very fast slew
rates. The STK12C68, which uses an external capaci-
tor, is an alternative for these applications.
BLOCK DIAGRAM
COLUMN I/O
COLUMN DEC
STATIC RAM
ARRAY
128 x 512
QUANTUM TRAP
128 x 512
STORE/
RECALL
CONTROL
STORE
RECALL
POWER
CONTROL
A5
A6
A9
A11
A12
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
SOFTWARE
DETECT
VCC
A0 - A12
G
E
W
A8
A7
A10
A3
A2
A0 A1
A4
PIN NAMES
A0 - A12
Address Inputs
W
Write Enable
DQ0 - DQ7
Data In/Out
E
Chip Enable
G
Output Enable
VCC
Power (+ 5V)
VSS
Ground
PIN CONFIGURATIONS
NC
A12
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
DQ1
DQ2
VSS
VCC
NC
A8
A9
A11
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
A10
E
DQ7
DQ6
DQ5
DQ4
DQ3
28 - 300 PDIP
28 - 600 PDIP
28 - 350 SOIC


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