參數(shù)資料
型號： DS1643P-70
廠商： DALLAS SEMICONDUCTOR
元件分類： Timer or RTC
英文描述： 0 TIMER(S), REAL TIME CLOCK, DMA34
封裝： POWERCAP MODULE-34
文件頁數(shù)： 1/14頁
文件大小： 180K
代理商： DS1643P-70
1 of 14
022101
FEATURES
Integrated NV SRAM, real time clock,
crystal, power-fail control circuit and lithium
energy source
Clock registers are accessed identically to the
static RAM. These registers are resident in the
eight top RAM locations.
Totally nonvolatile with over 10 years of
operation in the absence of power
Access times of 70 ns and 100 ns
BCD coded year, month, date, day, hours,
minutes,
and
seconds
with
leap
year
compensation valid up to 2100
Power-fail write protection allows for ±10%
VCC power supply tolerance
Lithium
energy
source
is
electrically
disconnected to retain freshness until power is
applied for the first time
DS1643 only (DIP Module)
–
Standard JEDEC byte-wide 8K x 8 RAM
pinout
DS1643P only (PowerCap Module Board)
–
Surface mountable package for direct
connection
to
PowerCap
containing
battery and crystal
–
Replaceable battery (PowerCap)
–
Power-fail output
–
Pin-for-pin
compatible
with
other
densities of DS164XP Timekeeping RAM
ORDERING INFORMATION
DS1643-XXX
28-pin DIP module
-70
70 ns access
-100
100 ns access
*DS1643P-XXX
34-pin PowerCap Module Board
-70
70 ns access
-100
100 ns access
*DS9034PCX
PowerCap
(Required; must be ordered
separately)
PIN ASSIGNMENT
DS1643/DS1643P
Nonvolatile Timekeeping RAM
www.dalsemi.com
13
27
28-PIN Encapsulated Package
(700-mil Extended)
A7
A5
A3
A2
A1
A0
DQ0
DQ1
GND
DQ2
VCC
WE
CE2
A8
A9
A11
OE
A10
CE
DQ7
DQ6
DQ5
DQ3
DQ4
1
2
3
4
5
6
7
8
9
10
11
12
14
28
26
25
24
23
22
21
20
19
18
17
15
16
A12
A6
A4
NC
1
NC
2
3
NC
PFO
VCC
WE
OE
CE
DQ7
DQ6
DQ5
DQ4
DQ3
DQ2
DQ1
DQ0
GND
4
5
6
7
8
9
10
11
12
13
14
15
16
17
NC
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
NC
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
34
NC
X1
GND
VBAT
X2
34-PIN PowerCap Module Board
(USES DS9034PCX PowerCap)
相關(guān)PDF資料
PDF描述
DS1643-70 0 TIMER(S), REAL TIME CLOCK, DMA28
DS1644-120 0 TIMER(S), REAL TIME CLOCK, DMA28
DS1644P-120 0 TIMER(S), REAL TIME CLOCK, DMA34
DS1644P 0 TIMER(S), REAL TIME CLOCK, DMA34
DS1644 0 TIMER(S), REAL TIME CLOCK, DMA28
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS1643P-70+ 功能描述:實時時鐘 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
DS1643P-85 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Nonvolatile Timekeeping RAMs
DS1643P-85+ 功能描述:實時時鐘 NV Timekeeping RAM RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
DS1644 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Nonvolatile Timekeeping RAM
DS1644+120 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Nonvolatile Timekeeping RAM
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