STK10C68-P30 데이터 시트보기 (PDF) - Simtek Corporation
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STK10C68-P30 Datasheet PDF : 10 Pages
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STK10C68
STK10C68
CMOS nvSRAM
High Performance
8K x 8 Nonvolatile Static RAM
FEATURES
• 25, 30, 35 and 45ns Access Times
• 12, 15, 20 and 25ns Output Enable Access
• Unlimited Read and Write to SRAM
• Hardware STORE Initiation
• Automatic STORE Timing
• 100,000 STORE cycles to EEPROM
• 10 year data retention in EEPROM
• Automatic RECALL on Power Up
• Hardware RECALL Initiation
• Unlimited RECALL cycles from EEPROM
• Single 5V±10% Operation
• Commercial and Industrial Temperatures
• Available in multiple standard packages
DESCRIPTION
The Simtek STK10C68 is a fast static RAM (25, 30, 35,
and 45ns), 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 may easily be transferred
from the SRAM to the EEPROM (STORE), or from the
EEPROM to the SRAM (RECALL) using the NE pin. It
combines the high performance and ease of use of a
fast SRAM with nonvolatile data integrity.
The STK10C68 features industry standard pinout for
nonvolatile RAMs in a 28-pin 300 mil plastic or ceramic
DIP, and a 28-pin SOIC package. MIL-STD-883 and
Standard Military Drawing (SMD #5962-93056) de-
vices are also available.
LOGIC BLOCK DIAGRAM
A3
A4
A
5
A6
A7
A8
A9
A
12
DQ 0
DQ 1
DQ 2
DQ 3
DQ 4
DQ 5
DQ 6
DQ 7
EEPROM ARRAY
256 x 256
STATIC RAM
ARRAY
256 x 256
STORE
RECALL
COLUMN I/O
COLUMN DECODER
A 0 A 1 A 2 A 10 A 11
PIN CONFIGURATIONS
STORE/
RECALL
CONTROL
G
NE
E
W
NE 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 VCC
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 PDIP
28 - 300 CDIP
28 - 350 SOIC
PIN NAMES
A0 - A12
W
Address Inputs
Write Enable
DQ0 - DQ7
E
Data In/Out
Chip Enable
G
Output Enable
NE
Nonvolatile Enable
VCC
Power (+5V)
VSS
Ground
4-1
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