M41ST87W集成电路(IC)实时时钟规格书PDF中文资料
厂商型号 |
M41ST87W |
参数属性 | M41ST87W 封装/外壳为28-SOIC(0.295",7.50mm 宽);包装为卷带(TR)剪切带(CT)Digi-Reel® 得捷定制卷带;类别为集成电路(IC) > 实时时钟;产品描述:IC RTC CLK/CALENDAR I2C 28-SOIC |
功能描述 | 5.0, 3.3, or 3.0V, 1280 bit (160 x8) Secure Serial RTC and NVRAM Supervisor with Tamper Detection |
文件大小 |
733.27 Kbytes |
页面数量 |
42 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 | 2024-6-14 22:59:00 |
M41ST87W规格书详情
Description
The M41ST87Y/W secure serial RTC and NVRAM supervisor is a low power 1280-bit, static CMOS SRAM organized as 160 bytes by 8 bits. A built-in 32.768 kHz oscillator (internal crystal-controlled) and 8 bytes of the SRAM (see Table 7 ) are used for the clock/calendar function and are configured in binary coded decimal (BCD) format.
An additional 11 bytes of RAM provide calibration, status/control of alarm, watchdog, tamper, and square wave functions. 8 bytes of ROM and finally 128 bytes of user RAM are also provided. Addresses and data are transferred serially via a two line, bidirectional I2C interface. The built-in address register is incremented automatically after each WRITE or READ data byte. The M41ST87Y/W 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 SRAM and clock operations can be supplied by a small lithium button-cell supply when a power failure occurs.
Features
■ 5.0, 3.3, or 3.0 V operation
■ 400 kHz I2C bus
■ NVRAM supervisor to non-volatize external LPSRAM
■ 2.5 to 5.5 V oscillator operating voltage
■ Automatic switchover and deselect circuitry
■ Choice of power-fail deselect voltages
– M41ST87Y:
THS = 1: VPFD≈ 4.63 V; VCC = 4.75 to 5.5 V
THS = 0: VPFD≈ 4.37 V; VCC = 4.5 to 5.5 V
– M41ST87W:
THS = 1: VPFD ≈ 2.9 V; VCC = 3.0 to 3.6 V
THS = 0: VPFD ≈ 2.63 V; VCC = 2.7 to 3.6 V
■ Two independent power-fail comparators
(1.25 V reference)
■ Counters for tenths/hundredths of seconds, seconds, minutes, hours, day, date, month, year, and century
■ 128 bytes of clearable, general purpose NVRAM
■ Programmable alarm and interrupt function
(valid even during battery backup mode)
■ Programmable watchdog timer
■ Unique electronic serial number (8-byte)
■ 32 kHz frequency output available upon power on
■ Microprocessor power-on reset output
■ Battery low flag
■ Ultra-low battery supply current of 500 nA (typ)
Security features
■ Tamper indication circuits with timestamp and RAM clear
■ LPSRAM clear function (TPCLR)
■ Packaging includes a 28-lead, embedded crystal SOIC and a 20-lead SSOP
■ Oscillator stop detection
M41ST87W属于集成电路(IC) > 实时时钟。意法半导体(ST)集团制造生产的M41ST87W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
- 产品编号:
M41ST87WMX6TR
- 制造商:
STMicroelectronics
- 类别:
集成电路(IC) > 实时时钟
- 包装:
卷带(TR)剪切带(CT)Digi-Reel® 得捷定制卷带
- 类型:
时钟/日历
- 特性:
警报器,闰年,NVSRAM,方波输出,监控器,监视计时器
- 存储容量:
128B
- 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 ~ 3.6V
- 电压 - 供电,电池:
2.5V ~ 3.6V
- 电流 - 计时(最大值):
0.5mA @ 2.7V ~ 3.6V
- 工作温度:
-40°C ~ 85°C
- 安装类型:
表面贴装型
- 封装/外壳:
28-SOIC(0.295",7.50mm 宽)
- 供应商器件封装:
28-SO
- 描述:
IC RTC CLK/CALENDAR I2C 28-SOIC
供应商 | 型号 | 品牌 | 批号 | 封装 | 库存 | 备注 | 价格 |
---|---|---|---|---|---|---|---|
ST(意法半导体) |
23+ |
SOX28 |
7350 |
现货供应,当天可交货!免费送样,原厂技术支持!!! |
询价 | ||
ST/意法 |
23+ |
NA/ |
749 |
优势代理渠道,原装正品,可全系列订货开增值税票 |
询价 | ||
ST |
2016+ |
SOP28 |
1980 |
只做原装,假一罚十,公司可开17%增值税发票! |
询价 | ||
ST/意法 |
2020+ |
NA |
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 | ||
STM |
15+ |
SOX-28 |
1000 |
原装正品长期供货,如假包赔包换 徐小姐13714450367 |
询价 | ||
ST/意法 |
21+ |
SOP28 |
5000 |
原装现货/假一赔十/支持第三方检验 |
询价 | ||
ST |
18+ |
SSOP-20 |
34508 |
全新原装现货,可出样品,可开增值税发票 |
询价 | ||
ST |
21+ |
SOP28 |
3637 |
全新原装亏本出13157115792 |
询价 | ||
ST |
2020+ |
SOP-28 |
350000 |
100%进口原装正品公司现货库存 |
询价 | ||
ST/意法半导体 |
23+ |
SO-28 |
12700 |
买原装认准中赛美 |
询价 |