參數(shù)資料
型號(hào)： DS1284
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： Timer or RTC
英文描述： 1 TIMER(S), REAL TIME CLOCK, PDIP28
封裝： 0.600 INCH, PLASTIC, DIP-28
文件頁(yè)數(shù)： 1/18頁(yè)
文件大?。?/td> 299K
代理商： DS1284
DS1284/DS1286
Watchdog Timekeepers
1 of 18
REV: 032406
GENERAL DESCRIPTION
www.maxim-ic.com
The DS1284/DS1286 watchdog timekeepers are
self-contained real-time clocks, alarms, watchdog
timers, and interval timers in a 28-pin JEDEC DIP
and encapsulated DIP package. The DS1286
contains an embedded lithium energy source and a
quartz crystal, which eliminates the need for any
external circuitry. The DS1284 requires an external
quartz crystal and a VBAT source, which could be a
lithium battery. Data contained within 64 8-bit
registers can be read or written in the same manner
as byte-wide static RAM. Data is maintained in the
watchdog timekeeper by intelligent control circuitry
that detects the status of VCC and write protects
memory when VCC is out of tolerance. The lithium
energy source can maintain data and real time for
over 10 years in the absence of VCC. Watchdog
timekeeper information includes hundredths of
seconds, seconds, minutes, hours, day, date, month,
and year. The date at the end of the month is
automatically adjusted for months with fewer than
31 days, including correction for leap year. The
DS1284/DS1286 operate in either 24-hour or 12-
hour format with an AM/PM indicator. The devices
provide alarm windows and interval timing between
0.01 seconds and 99.99 seconds. The real-time
alarm provides for preset times of up to one week.
ORDERING INFORMATION
FEATURES
Keeps Track of Hundredths of Seconds,
Seconds, Minutes, 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, Watchdog, User RAM, and Alarm
Information
Programmable Interrupts and Square-Wave
Outputs Maintain JEDEC Footprint
All Registers are Individually Addressable via
the Address and Data Bus
Accuracy is Better than ±1 Minute/Month at
+25°C (EDIP)
Greater than 10 Years of Timekeeping in the
Absence of VCC
50 Bytes of User NV RAM
Underwriters Laboratory (UL) Recognized
-40°C to +85°C Industrial Temperature Range
Option
Pin Configurations appear at end of data sheet.
PART
TEMP RANGE
VOLTAGE (V)
PIN-PACKAGE
TOP MARK*
DS1284
0°C to +70°C
5.0
28 DIP (600 mils)
DS1284
DS1284N
-40°C to +85°C
5.0
28 DIP (600 mils)
DS1284 N
DS1284Q
0°C to +70°C
5.0
28 PLCC
DS1284Q
DS1284Q+
0°C to +70°C
5.0
28 PLCC
DS1284Q
DS1284Q/T&R
0°C to +70°C
5.0
28 PLCC/Tape and Reel
DS1284Q
DS1284Q+T&R
0°C to +70°C
5.0
28 PLCC/Tape and Reel
DS1284Q
DS1284QN
-40°C to +85°C
5.0
28 PLCC
DS1284QN
DS1284QN+
-40°C to +85°C
5.0
28 PLCC
DS1284QN
DS1284QN/T&R
-40°C to +85°C
5.0
28 PLCC/Tape and Reel
DS1284QN
DS1284QN+T&R
-40°C to +85°C
5.0
28 PLCC/Tape and Reel
DS1284QN
DS1286
0°C to +70°C
5.0
28 EDIP (720 mils)
DS1286
DS1286I
-40°C to +85°C
5.0
28 EDIP (720 mils)
DS1286 IND
DS1286I+
-40°C to +85°C
5.0
28 EDIP (720 mils)
DS1286 IND
+ Denotes a lead(Pb)-free/RoHS-compliant package.
* A “+” anywhere on the top mark indicates a lead-free package.
相關(guān)PDF資料
PDF描述
DS1284QN 1 TIMER(S), REAL TIME CLOCK, PQCC28
DS1286 1 TIMER(S), REAL TIME CLOCK, DIP28
DS12885 1 TIMER(S), REAL TIME CLOCK, PDIP24
DS12885T 1 TIMER(S), REAL TIME CLOCK, PQFP32
DS12887A 1 TIMER(S), REAL TIME CLOCK, PDIP24
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS1284+ 功能描述:實(shí)時(shí)時(shí)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(shí)間格式:HH:MM:SS RTC 存儲(chǔ)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
DS1284N 功能描述:實(shí)時(shí)時(shí)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(shí)間格式:HH:MM:SS RTC 存儲(chǔ)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
DS1284Q 功能描述:實(shí)時(shí)時(shí)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(shí)間格式:HH:MM:SS RTC 存儲(chǔ)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
DS1284Q/T&R 制造商:Maxim Integrated Products 功能描述:IC TIMEKEEPER WATCHDOG 28-PLCC
DS1284Q/T&R 功能描述:實(shí)時(shí)時(shí)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(shí)間格式:HH:MM:SS RTC 存儲(chǔ)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
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