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參數(shù)資料
| 型號(hào)： | STK1744 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 32K x 8 AutoStore nvSRAM with Real-Time Clock |
| 中文描述： | 32K的× 8自動(dòng)存儲(chǔ)非易失實(shí)時(shí)時(shí)鐘 |
| 文件頁(yè)數(shù)： | 1/12頁(yè) |
| 文件大小： | 315K |
| 代理商： | STK1744 |
January 2003
1
Document Control # ML0020 rev 0.0
STK1744
nvTime
32K x 8
AutoStore
nvSRAM
with Real-Time Clock
FEATURES
Data Integrity of Simtek nvSRAM Combined
with Full-Featured Real-Time Clock
Stand-Alone Nonvolatile Memory and Time-
Keeping Solution
—
No Other Parts Required
No Batteries to Fail
Fast 25ns, 35ns and 45ns Access Times
Software- and
AutoStore
-Controlled
Nonvolatile Cycles
Year 2000 Compliant with Leap Year
Compensation
24-Hour BCD Format
100-Year Data Retention over Full Industrial
Temperature Range
Full 30-Day RTC Operation on Each Power
Loss
Single 5V
±
10% Power Supply
DESCRIPTION
The Simtek STK1744
DIP
module houses 256Kb of
nonvolatile static
RAM
, a real-time clock (
RTC
) with
crystal and a high-value capacitor to support sys-
tems that require high reliability and ease of manu-
facturing.
READ
and
WRITE
access to all
RTC
functions and the memory is the same as a conven-
tional x 8
SRAM
. The highest eight addresses of the
RAM
support clock registers for centuries, years,
months, dates, days, hours, minutes and seconds.
Independent data resides in the integral Nonvolatile
Elements at all times. Automatic
RECALL
on power
up transfers the Nonvolatile Elements data to the
SRAM
, while an automatic
STORE
on power down
transfers
SRAM
data to the Nonvolatile Elements. A
software
RECALL
and
STORE
are also possible on
user command.
nvTime
allows unlimited
READ
and
WRITE
accesses to
SRAM
, unlimited
RECALL
s
and 10
6
STORE
s.
BLOCK DIAGRAM
QUANTUM TRAP
512 x 512
STORE
RECALL
COLUMN I/O
COLUMN DEC
STATIC RAM
ARRAY
512 x 512
R
I
STORE/
RECALL
CONTROL
POWER
CONTROL
A
6
A
7
A
8
A
11
A
12
A
13
A
14
DQ
0
DQ
1
DQ
2
DQ
3
DQ
4
DQ
5
DQ
6
DQ
7
SOFTWARE
DETECT
V
CC
A
0
-
A
13
G
E
W
A
9
A
10
A
3
A
2
A
0
A
1
A
4
A
5
RTC
MUX
A
0
-
A
14
PIN CONFIGURATIONS
A
14
A
12
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
CC
W
A
13
A
8
A
9
A
11
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 - 600 DIP
Module
(See application
note for surface
mount)
PIN NAMES
A
0
- A
14
Address Inputs
W
Write Enable
DQ
0
- DQ
7
Data In/Out
E
Chip Enable
G
Output Enable
V
CC
Power (+ 5V)
V
SS
Ground
PRELIMINARY
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| STK1744-D25 | 32K x 8 AutoStore nvSRAM with Real-Time Clock |
| STK1744-D25I | 32K x 8 AutoStore nvSRAM with Real-Time Clock |
| STK1744-D35 | 32K x 8 AutoStore nvSRAM with Real-Time Clock |
| STK1744-D35I | 32K x 8 AutoStore nvSRAM with Real-Time Clock |
| STK1744-D45 | 32K x 8 AutoStore nvSRAM with Real-Time Clock |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| STK17T88-RF25 | 功能描述:NVRAM 32Kbx8+RTC 2.7-3.6V RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)總線寬度:8 bit 存儲(chǔ)容量:1024 Kbit 組織:128 K x 8 接口類型:Parallel 訪問時(shí)間:70 ns 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 工作電流:85 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 封裝 / 箱體:EDIP 封裝:Tube |
| STK17T88-RF25I | 功能描述:NVRAM 32Kbx8+RTC 2.7-3.6V RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)總線寬度:8 bit 存儲(chǔ)容量:1024 Kbit 組織:128 K x 8 接口類型:Parallel 訪問時(shí)間:70 ns 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 工作電流:85 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 封裝 / 箱體:EDIP 封裝:Tube |
| STK17T88-RF25ITR | 功能描述:NVRAM 32Kbx8+RTC 2.7-3.6V RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)總線寬度:8 bit 存儲(chǔ)容量:1024 Kbit 組織:128 K x 8 接口類型:Parallel 訪問時(shí)間:70 ns 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 工作電流:85 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 封裝 / 箱體:EDIP 封裝:Tube |
| STK17T88-RF25TR | 功能描述:NVRAM 32Kbx8+RTC 2.7-3.6V RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)總線寬度:8 bit 存儲(chǔ)容量:1024 Kbit 組織:128 K x 8 接口類型:Parallel 訪問時(shí)間:70 ns 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 工作電流:85 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 封裝 / 箱體:EDIP 封裝:Tube |
| STK17T88-RF45 | 功能描述:NVRAM 32Kbx8+RTC 2.7-3.6V RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)總線寬度:8 bit 存儲(chǔ)容量:1024 Kbit 組織:128 K x 8 接口類型:Parallel 訪問時(shí)間:70 ns 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 工作電流:85 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 封裝 / 箱體:EDIP 封裝:Tube |
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