- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385271 > DS1286 (MAXIM INTEGRATED PRODUCTS INC) Watchdog Timekeeper(看門狗計時器芯片) PDF資料下載
參數(shù)資料
| 型號： | DS1286 |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | XO, clock |
| 英文描述： | Watchdog Timekeeper(看門狗計時器芯片) |
| 中文描述： | 1 TIMER(S), REAL TIME CLOCK, DMA28 |
| 封裝： | EDIP MODULE-28 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大?。?/td> | 122K |
| 代理商： | DS1286 |
DS1286
Watchdog Timekeeper
DS1286
022798 1/12
FEATURES
Keeps track of hundredths of seconds, seconds, min-
utes, hours, days, date of the month, months, and
years; valid leap year compensation up to 2100
Watchdog timer restarts an out–of–control processor
Alarm function schedules real time–related activities
Embedded lithium energy cell maintains time, watch-
dog, user RAM, and alarm information
Programmable interrupts and square wave outputs
maintain 28–pin JEDEC footprint
All registers are individually addressable via the ad-
dress and data bus
Accuracy is better than
±
1 minute/month at 25
°
C
Greater than 10 years of timekeeping in the absence
of V
CC
50 bytes of user NV RAM
PIN ASSIGNMENT
V
CC
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
NC
NC
NC
A5
A4
A3
A2
A1
A0
DQ0
DQ1
DQ2
GND
NC
NC
SQW
NC
CE
DQ7
DQ6
DQ5
DQ4
DQ3
INTA
WE
OE
INTB(INTB)
28–PIN ENCAPSULATED PACKAGE
(720 MIL FLUSH)
PIN DESCRIPTION
INTA
INTB(INTB)
A0–A5
DQ0-DQ7
CE
OE
WE
V
CC
GND
NC
SQW
– Interrupt Output A (open drain)
– Interrupt Output B (open drain)
– Address Inputs
– Data Input/Output
– Chip Enable
– Output Enable
– Write Enable
– +5 Volts
– Ground
– No Connection
– Square Wave Output
DESCRIPTION
The DS1286 Watchdog Timekeeper is a self–contained
real time clock, alarm, watchdog timer, and interval tim-
er in a 28–pin JEDEC DIP package. The DS1286 con-
tains an embedded lithium energy source and a quartz
crystal which eliminates the need for any external cir-
cuitry. Data contained within 64 eight–bit registers can
be read or written in the same manner as bytewide static
RAM. Data is maintained in the Watchdog Timekeeper
by intelligent control circuitry which detects the status of
V
CC
and write protects memory when V
CC
is out of tol-
erance. The lithium energy source can maintain data
and real time for over ten years in the absence of V
CC
.
Watchdog Timekeeper information includes hun-
dredths of seconds, seconds, minutes, hours, day, date,
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS1287A | Real Time Clock(實時時鐘) |
| DS1287 | Real Time Clock(實時時鐘) |
| DS12885 | Real Time Clock(實時時鐘) |
| DS12885Q | Real Time Clock(實時時鐘) |
| DS12885T | Real Time Clock(實時時鐘) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1286+ | 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 |
| DS1286I | 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 |
| DS1286I+ | 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 |
| DS12885 | 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 |
| DS12885+ | 功能描述:實時時鐘 RTC 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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。