STK11C48 Datasheet, PDF (1/10 Pages) List of Unclassifed Manufacturers – 2K x 8 nvSRAM QuantumTrap CMOS Nonvolatile Static RAM

STK11C48
2K x 8 nvSRAM
QuantumTrap™ CMOS
Nonvolatile Static RAM
FEATURES
• 25ns, 35ns and 45ns Access Times
• STORE to Nonvolatile Elements Initiated by
Software
• 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 in Nonvolatile Ele-
ments
• Commercial and Industrial Temperatures
• 28-Pin 300 mil PDIP, 300 mil SOIC and
350 mil SOIC Packages
DESCRIPTION
The Simtek STK11C48 is a fast static RAM with a
nonvolatile element incorporated in each static
memory cell. The SRAM can be read and written an
unlimited number of times, while independent, non-
volatile data resides in the Nonvolatile Elements.
Data transfers from the SRAM to the Nonvolatile Ele-
ments (the STORE operation), or from Nonvolatile
Elements to SRAM (the RECALL operation), take
place using a software sequence. Transfers from the
Nonvolatile Elements to the SRAM (the RECALL
operation) also take place automatically on restora-
tion of power.
BLOCK DIAGRAM
Quantum Trap
32 x 512
A₅
STORE
A₆
STATIC RAM
A₇
ARRAY
RECALL
A₈
32 x 512
A₉
DQ₀
DQ₁
DQ₂
DQ₃
DQ₄
DQ₅
DQ₆
DQ₇
COLUMN I/O
COLUMN DEC
A₀ A₁ A₂ A₃ A₄ A₁₀
STORE/
RECALL
CONTROL
SOFTWARE
DETECT
G
E
W
A₀ - A₁₀
PIN CONFIGURATIONS
NC 1
NC 2
A₇ 3
A₆ 4
A₅ 5
A₄ 6
A₃ 7
A₂ 8
A₁ 9
A₀ 10
DQ₀ 11
DQ₁ 12
DQ₂ 13
V_SS 14
28 V_CC
27 W
26 NC
25 A₈
24 A₉
23 NC
22 G
21 A₁₀
20 E
19 DQ₇
18 DQ₆
17 DQ₅
16 DQ₄
15 DQ₃
28 - 300 PDIP
28 - 300 SOIC
28 - 350 SOIC
PIN NAMES
A₀ - A₁₀
W
Address Inputs
Write Enable
DQ₀ - DQ₇
E
Data In/Out
Chip Enable
G
Output Enable
V_CC
Power (+ 5V)
V_SS
Ground
December 2002
1 Document Control # ML0003 rev 0.0