參數(shù)資料
型號(hào)： STK1743-D35I
元件分類： 時(shí)鐘/數(shù)據(jù)恢復(fù)及定時(shí)提取
英文描述： 0 TIMER(S), REAL TIME CLOCK, DIP28
封裝： 0.600 INCH, MODULE, DIP-28
文件頁(yè)數(shù)： 1/12頁(yè)
文件大?。?/td> 314K
代理商： STK1743-D35I
January 2003
1
Document Control # ML0011 rev 0.0
STK1743
nvTime
8K x 8 AutoStorenvSRAM
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 STK1743 DIP module houses 64Kb 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 RECALLs
and 106 STOREs.
BLOCK DIAGRAM
QUANTUM TRAP
128 x 512
STORE
RECALL
COLUMN I/O
COLUMN DEC
STATIC RAM
ARRAY
128 x 512
ROW
DEC
O
DER
IN
PUT
BU
FFERS
STORE/
RECALL
CONTROL
POWER
CONTROL
A6
A7
A11
A12
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
SOFTWARE
DETECT
VCC
A0 - A12
G
E
W
A9
A8
A10
A3
A2
A0 A1
A4
A5
RTC
MUX
A0 -
A12
PIN CONFIGURATIONS
NC
A12
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
DQ1
DQ2
VSS
VCC
NC
A8
A9
A11
G
W
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
A10
E
DQ7
DQ6
DQ5
DQ4
DQ3
28 - 600
DIP
PIN NAMES
A0 - A12
Address Inputs
W
Write Enable
DQ0 - DQ7
Data In/Out
E
Chip Enable
G
Output Enable
NC
No Connect
VCC
Power (+ 5V)
VSS
Ground
PRELIMINARY
28 - 600 DIP
Module
(See application
note for surface
mount)
相關(guān)PDF資料
PDF描述
STK17CA8-W45I REAL TIME CLOCK, PDIP40
STK17T88-RF45TR PROGRAMMABLE TIMER, PDSO48
STK17T88-RF45 PROGRAMMABLE TIMER, PDSO48
STK17T88-RF25ITR PROGRAMMABLE TIMER, PDSO48
STK17TA8-R25I REAL TIME CLOCK, PDSO48
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