M41T81S集成电路(IC)实时时钟规格书PDF中文资料
厂商型号 |
M41T81S |
参数属性 | M41T81S 封装/外壳为8-SOIC(0.154",3.90mm 宽);包装为管件;类别为集成电路(IC) > 实时时钟;产品描述:IC RTC CLK/CALENDAR I2C 8-SOIC |
功能描述 | Serial Access Real-Time Clock with Alarms |
文件大小 |
438.76 Kbytes |
页面数量 |
29 页 |
生产厂商 | STMicroelectronics |
企业简称 |
STMICROELECTRONICS【意法半导体】 |
中文名称 | 意法半导体(ST)集团官网 |
原厂标识 | |
数据手册 | |
更新时间 | 2024-9-22 23:43:00 |
M41T81S规格书详情
Summary description
The M41T81S is a low power Serial RTC with a built-in 32.768kHz oscillator (external crystal controlled). Eight bytes of the SRAM (see Table 2: Clock register map on page 15) are used for the clock/calendar function and are configured in binary coded decimal (BCD) format. An additional 12 bytes of SRAM provide status/control of Alarm, Watchdog and Square Wave functions. Addresses and data are transferred serially via a two line, bi-directional I2C interface. The built-in address register is incremented automatically after each WRITE or READ data byte.
The M41T81S has a built-in power sense circuit which detects power failures and automatically switches to the battery supply when a power failure occurs. The energy needed to sustain the clock operations can be supplied by a small lithium button supply when a power failure occurs. Functions available to the user include a non-volatile, time-ofday clock/calendar, Alarm interrupts, Watchdog Timer and programmable Square Wave output. The eight clock address locations contain the century, year, month, date, day, hour, minute, second and tenths/hundredths of a second in 24 hour BCD format. Corrections for 28, 29 (leap year - valid until year 2100), 30 and 31 day months are made automatically. The M41T81S is supplied in either an 8-pin SOIC or an 18-pin (MY), 300mil SOIC package which includes an embedded 32kHz crystal.
The 18-pin, embedded crystal SOIC requires only a user-supplied battery to provide nonvolatile operation.
Features
■ Counters for tenths/hundredths of seconds,
seconds, minutes, hours, day, date, month,
year, and century
■ 32KHz crystal oscillator with integrated load
capacitance (12.5pf) which provides
exceptional oscillator stability and high crystal
series resistance operation)
■ Oscillator stop detection (monitors clock operation)
■ Serial interface supports i2c bus (400kHz protocol)
■ Ultra-low battery supply current of 0.6μA (typ)
■ 2.0 to 5.5v clock operating voltage
■ Automatic switchover and deselect circuitry
(fixed reference) which provides full operation
in 3.0V applications)
■ VCC = 2.7 to 5.5V
■ 2.5V ≤ VPFD ≤ 2.7V
■ Power-down time stamp (ht bit) which allows
determination of time elapsed in battery backup
■ Battery low flag
■ Programmable alarm and interrupt function
(valid even during battery back-up mode)
■ Accurate programmable watchdog timer (from 62.5ms to 128s)
■ Software clock calibration (to compensate for
crystal deviation due to temperature)
■ Operating temperature of –40 to 85°C
■ Package options include an 8-lead SOIC or 18-
lead embedded crystal SOIC
M41T81S属于集成电路(IC) > 实时时钟。意法半导体(ST)集团制造生产的M41T81S实时时钟实时时钟 (RTC) 为几乎所有需要保持精确时间的电子设备提供时间和/或日期信息。时钟类型有二进制计数器、时钟/日历/监控器、历时计时器、幻时钟芯片、便携式系统控制器、温度记录器、时间事件记录器和计时器时钟外设。其包含 2 B 至 2 MB 不等的存储器,接口选项有 I2C、并行、串行、SPI、1 线式、2 线式、3 线式和 4 线式。
产品属性
更多- 产品编号:
M41T81SM6F
- 制造商:
STMicroelectronics
- 类别:
集成电路(IC) > 实时时钟
- 包装:
管件
- 类型:
时钟/日历
- 特性:
警报器,闰年,方波输出,监视计时器
- 时间格式:
HH:MM:SS:hh(24 小时)
- 日期格式:
YY-MM-DD-dd
- 接口:
I²C,2 线串口
- 电压 - 供电:
2.7V ~ 5.5V
- 电压 - 供电,电池:
2V ~ 3.5V
- 电流 - 计时(最大值):
100µA @ 2.7V ~ 5.5V
- 工作温度:
-40°C ~ 85°C
- 安装类型:
表面贴装型
- 封装/外壳:
8-SOIC(0.154",3.90mm 宽)
- 供应商器件封装:
8-SOIC
- 描述:
IC RTC CLK/CALENDAR I2C 8-SOIC
供应商 | 型号 | 品牌 | 批号 | 封装 | 库存 | 备注 | 价格 |
---|---|---|---|---|---|---|---|
STMicroelect |
23+ |
8-SOIC |
53079 |
询价 | |||
ST(意法) |
23+ |
NA/ |
8735 |
原厂直销,现货供应,账期支持! |
询价 | ||
ST |
2016+ |
SOP8 |
1000 |
只做原装,假一罚十,公司可开17%增值税发票! |
询价 | ||
ST |
2020+ |
SOP8 |
80000 |
只做自己库存,全新原装进口正品假一赔百,可开13%增 |
询价 | ||
ST |
20+ |
SOP18 |
2960 |
诚信交易大量库存现货 |
询价 | ||
ST |
23+ |
SOP8 |
20000 |
原厂原装正品现货 |
询价 | ||
STM |
2020+ |
SOP-8 |
16800 |
绝对原装进口现货,假一赔十,价格优势!? |
询价 | ||
ST/意法 |
23+ |
SOP8 |
90000 |
只做原厂渠道价格优势可提供技术支持 |
询价 | ||
ST |
SOP-8 |
893993 |
集团化配单-有更多数量-免费送样-原包装正品现货-正规 |
询价 | |||
STM |
2018+ |
26976 |
代理原装现货/特价热卖! |
询价 |