STK11C88-S25I 데이터 시트보기 (PDF) - Simtek Corporation
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STK11C88-S25I Datasheet PDF : 9 Pages
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STK11C88
32K x 8 nvSRAM
QuantumTrap™ CMOS
Nonvolatile Static RAM
FEATURES
• 20ns, 25ns, 35ns and 45ns Access Times
• STORE to EEPROM 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 EEPROM
• 100-Year Data Retention in EEPROM
• Commercial and Industrial Temperatures
• 28-Pin PDIP and SOIC Packages
DESCRIPTION
The Simtek STK11C88 is a fast static RAM with a
nonvolatile, electrically erasable PROM 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 (the STORE operation), or from EEPROM to
SRAM (the RECALL operation), take place using a
software sequence. Transfers from the EEPROM to
the SRAM (the RECALL operation) also take place
automatically on restoration of power.
The STK11C88 is pin-compatible with industry-
standard SRAMs.
BLOCK DIAGRAM
A5
A6
A7
A8
A9
A11
A12
A13
A14
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
EEPROM ARRAY
512 x 512
STATIC RAM
ARRAY
512 x 512
STORE
RECALL
COLUMN I/O
COLUMN DEC
A0 A1 A2 A3 A4A10
STORE/
RECALL
CONTROL
SOFTWARE
DETECT
G
E
W
PIN CONFIGURATIONS
A0 - A13
A14 1
A12 2
A7 3
A6 4
A5 5
A4 6
A3 7
A2 8
A1 9
A0 10
DQ0 11
DQ1 12
DQ2 13
VSS 14
28 VCC
27 W
26 A13
25 A8
24 A9
23 A11
22 G
21 A10
20 E
19 DQ7 28 - 300 PDIP
18
17
DQ6
DQ5
28 - 600 PDIP
16 DQ4 28 - 300 SOIC
15 DQ3 28 - 350 SOIC
PIN NAMES
A0 - A14
W
Address Inputs
Write Enable
DQ0 - DQ7
E
Data In/Out
Chip Enable
G
Output Enable
VCC
Power (+5V)
VSS
Ground
July 1999
5-1
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