STK11C68-M Datasheet, PDF (1/10 Pages) List of Unclassifed Manufacturers – CMOS NV SRAM

STK11C68-M
STK11C68-M
CMOS nvSRAM
High Performance
8K x 8 Nonvolatile Static RAM
MIL-STD-883/SMD # 5962-92324
FEATURES
• 35, 45 and 55ns Access Times
• 17, 20 and 25ns Output Enable Access
• Unlimited Read and Write to SRAM
• Software STORE Initiation
• Automatic STORE Timing
• 100,000 STORE cycles to EEPROM
• 10 year data retention in EEPROM
• Automatic RECALL on Power Up
• Software RECALL Initiation
• Unlimited RECALL cycles from EEPROM
• Single 5V ± 10% Operation
• Available in multiple standard packages
DESCRIPTION
The Simtek STK11C68-M is a fast static RAM (35, 45
and 55ns), with a nonvolatile electrically-erasable PROM
(EEPROM) 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 EEPROM. Data transfers from the SRAM to
the EEPROM (STORE), or from the EEPROM to the
SRAM (RECALL) are initiated through software se-
quences. It combines the high performance and ease
of use of a fast SRAM with nonvolatile data integrity.
The STK11C68-M is pin compatible with industry stan-
dard SRAMs and is available in a 28-pin 300 mil
ceramic DIP or 28-pad LCC package. Commercial and
industrial devices are also available.
LOGIC BLOCK DIAGRAM
A₃
A₄
A
5
A₆
A₇
A₈
A₉
A₁₂
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
EEPROM ARRAY
256 x 256
STATIC RAM
ARRAY
256 x 256
STORE
RECALL
COLUMN I/O
COLUMN DECODER
A ₀ A ₁ A ₂ A₁₀ A₁₁
A ₀ A ₁₂
STORE/
RECALL
CONTROL
PIN CONFIGURATIONS
A6
A₅
A4
A3
A2
A₁
A0
DQ₀
DQ₁
32
28 27
4
1
26
5
25
6
24
7
23
8 TOP VIEW 22
9
21
10
20
11
19
12
18
13 14 15 16 17
NC
A8
A9
A11
G
A₁₀
E
DQ₇
DQ 6
28 - LCC
NC 1
A 12 ²
A₇ 3
A₆ 4
A5 5
A₄ 6
A₃ 7
A₂ 8
A₁ ⁹
A ₀ 10
DQ ₀ 11
DQ ₁ 12
DQ ₂ 13
VSS 14
28 V_CC
27 W
26 NC
25 A 8
24 _{A 9}
23 A 11
22 G
21 A ₁₀
20 E
19 DQ 7
18 DQ ₆
17 _{DQ 5}
16 DQ 4
15 DQ ₃
28 - 300 C-DIP
PIN NAMES
A₀ - A₁₂
W
Address Inputs
Write Enable
DQ₀ - DQ₇
E
Data In/Out
Chip Enable
G
G
Output Enable
V_CC
Power (+5V)
V_SS
Ground
E
W
4-31