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参数资料
| 型号： | STK22C48-S45 |
| 英文描述： | NVRAM (EEPROM Based) |
| 中文描述： | NVRAM中（EEPROM的基础） |
| 文件页数： | 1/10页 |
| 文件大小： | 110K |
| 代理商： | STK22C48-S45 |
July 1999
3-21
PIN CONFIGURATIONS
V
CAP
NC
A
7
A
6
A
5
A
4
A
3
A
2
A
1
A
0
DQ
0
DQ
1
DQ
2
V
SS
V
CCX
W
HSB
A
8
A
9
NC
G
A
10
E
DQ
7
DQ
6
DQ
5
DQ
4
DQ
3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
28 - 300 PDIP
28 - 600 PDIP
28 - 300 SOIC
28 - 350 SOIC
PIN NAMES
A
0
- A
10
DQ
0
-DQ
7
E
W
G
HSB
V
CCX
V
CAP
V
SS
Address Inputs
Data In/Out
Chip Enable
Write Enable
Output Enable
Hardware Store Busy (I/O)
Power (+ 5V)
Capacitor
Ground
STK22C48
2K x 8
AutoStore
nvSRAM
QuantumTrap
CMOS
Nonvolatile Static RAM
FEATURES
20ns, 25ns, 35ns and 45ns Access Times
“
Hands-off
”
Automatic
STORE
with External
68
μ
F Capacitor on Power Down
STORE
to EEPROM Initiated by Hardware or
AutoStore
on Power Down
Automatic
RECALL
on
Power Up
10mA Typical I
CC
at 200ns Cycle Time
Unlimited READ, WRITE and
RECALL
Cycles
1,000,000
STORE
Cycles to EEPROM
100-Year Data Retention in EEPROM
Single 5V + 10% Operation
Not Sensitive to Power On/Off Ramp Rates
No Data Loss from Undershoot
Commercial and Industrial Temperatures
28-Pin DIP and SOIC Packages
DESCRIPTION
The Simtek STK22C48 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) can take place
automatically on power down. A 68
μ
F or larger
capacitor tied from V
CAP
to ground guarantees the
STORE
operation, regardless of power-down slew
rate or loss of power from “hot swapping”. Transfers
from the
EEPROM
to the
SRAM
(the
RECALL
opera-
tion) take place automatically on restoration of
power. A hardware
STORE
may be initiated with the
HSB pin.
BLOCK DIAGRAM
COLUMN I/O
COLUMN DEC
STATIC RAM
ARRAY
32 x 512
R
I
EEPROM ARRAY
32 x 512
STORE/
RECALL
CONTROL
STORE
RECALL
POWER
CONTROL
A
5
A
6
A
7
A
9
DQ
0
DQ
1
DQ
2
DQ
3
DQ
4
DQ
5
DQ
6
DQ
7
G
E
W
A
8
A
10
A
3
A
2
A
0
A
1
A
4
V
CCX
V
CAP
HSB
相关PDF资料 |
PDF描述 |
|---|---|
| STK22C48-S45I | NVRAM (EEPROM Based) |
| STK22C48-W20 | NVRAM (EEPROM Based) |
| STK22C48-W25 | NVRAM (EEPROM Based) |
| STK22C48-W25I | DIODE TVS 300V 400W UNI 5% SMA |
| STK22C48-W35 | DIODE TVS 30V 400W BIDIR 5% SMA |
相关代理商/技术参数 |
参数描述 |
|---|---|
| STK22C48S45I | 制造商:未知厂家 制造商全称:未知厂家 功能描述:2K x 8 AutoStore⑩ nvSRAM QuantumTrap⑩ CMOS Nonvolatile Static RAM |
| STK22C48-S45I | 制造商:SIMTEK 制造商全称:Simtek Corporation 功能描述:2Kx8 AutoStore nvSRAM |
| STK22C48-S45ITR | 制造商:SIMTEK 制造商全称:Simtek Corporation 功能描述:2Kx8 AutoStore nvSRAM |
| STK22C48-S45TR | 制造商:SIMTEK 制造商全称:Simtek Corporation 功能描述:2Kx8 AutoStore nvSRAM |
| STK22C48-SF25 | 功能描述:NVRAM 2Kbx8 4.5-5.5V AutoStore RoHS:否 制造商:Maxim Integrated 数据总线宽度:8 bit 存储容量:1024 Kbit 组织:128 K x 8 接口类型:Parallel 访问时间:70 ns 电源电压-最大:5.5 V 电源电压-最小:4.5 V 工作电流:85 mA 最大工作温度:+ 70 C 最小工作温度:0 C 封装 / 箱体:EDIP 封装:Tube |
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