STK11C88
32K x 8 nvSRAM
QuantumTrap™ CMOS
Nonvolatile Static RAM
FEATURES
DESCRIPTION
• 25ns, 35ns and 45ns Access Times
The Simtek STK11C88 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 Nonvolatile Elements. Data
transfers from the SRAM to the Nonvolatile Elements
(the STORE operation), or from Nonvolatile Elements
to SRAM (the RECALL operation), are initiated using
a software sequence. Data transfers from the Non-
volatile Elements to the SRAM (the RECALL opera-
tion) also occur upon restoration of power.
• STORE to Nonvolatile Elements Initiated by
Software
• RECALL to SRAM Initiated by Software or
Power Restore
• 10mA Typical ICC at 200ns Cycle Time
• Unlimited READ, WRITE and RECALL Cycles
• 1,000,000 STORE Cycles to Nonvolatile Ele-
ments (Commercial/Industrial)
• 100-Year Data Retention in Nonvolatile Ele-
ments (Commercial/Industrial)
The STK11C88 is pin-compatible with industry-
standard SRAMs.
• Single 5V + 10% Operation
• Commercial and Industrial Temperatures
• 28-Pin PDIP and SOIC Packages
BLOCK DIAGRAM
PIN CONFIGURATIONS
A14
A12
A7
1
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VCC
W
QUANTUM TRAP
2
3
4
5
6
7
8
9
10
11
12
13
14
512 x 512
A13
A8
A5
A6
A5
A9
A6
STORE
STORE/
RECALL
A4
A11
G
A10
E
DQ7
DQ6
DQ5
DQ4
DQ3
A7
A3
A8
STATIC RAM
ARRAY
A2
CONTROL
RECALL
A9
A1
A11
A12
A13
A14
512 x 512
A0
28 - 300 PDIP
28 - 600 PDIP
28 - 300 SOIC
28 - 350 SOIC
DQ0
DQ1
DQ2
VSS
SOFTWARE
DETECT
A
- A
13
0
DQ
DQ
DQ
0
1
2
COLUMN I/O
PIN NAMES
COLUMN DEC
A
- A
Address Inputs
Write Enable
Data In/Out
Chip Enable
Output Enable
Power (+5V)
Ground
0
14
DQ
3
4
DQ
W
DQ
DQ
DQ
5
6
7
A
0
A A A
A A
1 4
2 3
10
DQ - DQ
0
7
G
E
E
W
G
V
V
CC
SS
September 2003
1
Document Control # ML0012 rev 0.1
SIMTEK [ SIMTEK CORPORATION ]
