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DS1308U-3+ 其他数据使用手册 - Maxim Integrated（美信）
制造商:
Maxim Integrated（美信）
分类:
实时时钟芯片
封装:
uSOP-8
描述:
NV 存储器，IntegratedMaxim 一系列实时时钟产品包含用于数据保存的非易失 RAM 存储器。 时钟/日历功能提供秒、分钟、小时、日、日期、月和年份信息。 此时钟通常以 12 或 24 小时格式操作，带有 AM/PM 指示器。 附加功能包括监控计时器、警报和涓流充电设备（用于外部备用电池）；还提供一些设备，包括集成晶体时钟振荡器。### 实时时钟 (RTC)
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DS1308U-3+数据手册
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若手册格式错乱，请下载阅览PDF原文件
DS1308
Low-Current I
2
C RTC with 56-Byte NV RAM
General Description
The DS1308 serial real-time clock (RTC) is a low-power,
full binary-coded decimal (BCD) clock/calendar plus
56 bytes of NV RAM. Address and data are transferred
serially through an I
2
C interface. The clock/calendar
provides seconds, minutes, hours, day, date, month,
and year information. The end of the month date is auto-
matically adjusted for months with fewer than 31 days,
including corrections for leap year. The clock operates
in either the 24-hour or 12-hour format with an AM/PM
indicator. The DS1308 has a built-in power-sense circuit
that detects power failures and automatically switches to
the backup supply, maintaining time and date operation.
Applications
Handhelds (GPS, POS Terminal)
Consumer Electronics (Set-Top Box, Digital
Recording, Network Appliance)
Office Equipment (Fax/Printer, Copier)
Medical (Glucometer, Medicine Dispenser)
Telecommunications (Router, Switcher, Server)
Other (Utility Meter, Vending Machine,
Thermostat, Modem)
Features
S Low Timekeeping Current of 250nA (typ)
S Compatible with Crystal ESR Up to 100kω
S RTC Counts Seconds, Minutes, Hours, Date,
Month, Day of the Week, and Year with Leap-Year
Compensation Up to 2400
S 56-Byte, Battery-Backed, General-Purpose RAM
with Unlimited Writes
S I
2
C Serial Interface
S External Clock Source for Synchronization Clock
Reference (e.g., 32kHz, 50Hz/60Hz Powerline, GPS
1PPS)
S Programmable Square-Wave Output Signal
S Automatic Power-Fail Detect and Switch Circuitry
S -40NC to +85NC Operating Temperature Range
S Underwriters Laboratories (UL) Recognized
Typical Operating Circuit
19-6353; Rev 1; 4/13
Ordering Information appears at end of data sheet.
For related parts and recommended products to use with this part, refer to: www.maximintegrated.com/DS1308.related
DS1308
SCL
SDA
SQW/CLKIN
X1
X2
V
BAT
GND
V
CC
V
CC
R
PU
R
PU
R
PU
CPU
V
CC
For pricing, delivery, and ordering information, please contact Maxim Direct at
1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
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