M41ST87W

批量生产

5.0 V, 3.3/3.0 V secure real-time clock , NVRAM supervisor with tamper detection and 128 bytes of clearable NVRAM

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样片和购买
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  • 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 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.
    Functions available to the user include a non-volatile, time-of-day clock/calendar, alarm interrupts, tamper detection, watchdog timer, and programmable square wave output. Other features include a power-on reset as well as two additional debounced inputs (RSTIN1and RSTIN2) which can also generate an output reset (RST). 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), 30 and 31 day months are made automatically.

    主要特性

    • 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: (not recommended for new design, contact ST sales office for availability) 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

电路原理图

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样片和购买

产品型号
封装
包装类型
温度(ºC) 供货状态
NVRAM size (B)
ECCN (US)
Country of Origin
Budgetary Price (US$)*/Qty
从ST订购
从分销商订购
最小值
最大值
M41ST87WMX6TR SO28 WITH EMBEDDED CRYSTAL Tape And Reel -40 85
批量生产
128 EAR99 PHILIPPINES 3.94 / 1k 查看供货情况

...的经销商可用性M41ST87WMX6TR

代理商名称
地区 库存 最小订购量 第三方链接
RS COMPONENTS EUROPE 2686 1 马上订购
Newark Element14 AMERICA 50 0 马上订购

代理商库存报告日期: 2020-05-19

代理商名称

RS COMPONENTS

库存

2686

Min.Order

1

地区

EUROPE 马上订购

Newark Element14

库存

50

Min.Order

0

地区

AMERICA 马上订购

代理商库存报告日期: 2020-05-19

M41ST87WSS6F SSOP 20 7.2x5.3 Tape And Reel -40 85
批量生产
128 EAR99 MALAYSIA 获取样片 查看供货情况

...的经销商可用性M41ST87WSS6F

代理商名称
地区 库存 最小订购量 第三方链接
DIGIKEY WORLDWIDE 2457 1 马上订购
RS COMPONENTS EUROPE 1062 1 马上订购
ARROW EUROPE 4050 0 马上订购
MOUSER WORLDWIDE 2125 1 马上订购
ANGLIA Live EUROPE 1000 1 马上订购

代理商库存报告日期: 2020-05-19

代理商名称

DIGIKEY

库存

2457

Min.Order

1

地区

WORLDWIDE 马上订购

RS COMPONENTS

库存

1062

Min.Order

1

地区

EUROPE 马上订购

ARROW

库存

4050

Min.Order

0

地区

EUROPE 马上订购

MOUSER

库存

2125

Min.Order

1

地区

WORLDWIDE 马上订购

ANGLIA Live

库存

1000

Min.Order

1

地区

EUROPE 马上订购

代理商库存报告日期: 2020-05-19

M41ST87WMX6TR

封装

SO28 WITH EMBEDDED CRYSTAL

包装类型

Tape And Reel

Budgetary Price (US$)*/Qty

3.94 / 1k

...的经销商可用性M41ST87WMX6TR

代理商名称
地区 库存 最小订购量 第三方链接
RS COMPONENTS EUROPE 2686 1 马上订购
Newark Element14 AMERICA 50 0 马上订购

代理商库存报告日期: 2020-05-19

代理商名称

RS COMPONENTS

库存

2686

Min.Order

1

地区

EUROPE 马上订购

Newark Element14

库存

50

Min.Order

0

地区

AMERICA 马上订购

代理商库存报告日期: 2020-05-19

Operating Temperature (°C)

(最小值)

-40

(最大值)

85

供货状态

批量生产

Budgetary Price (US$)* / Qty

3.94 / 1k

NVRAM size (B)

128

ECCN (US)

EAR99

Country of Origin

PHILIPPINES

M41ST87WSS6F

封装

SSOP 20 7.2x5.3

包装类型

Tape And Reel

Budgetary Price (US$)*/Qty

...的经销商可用性M41ST87WSS6F

代理商名称
地区 库存 最小订购量 第三方链接
DIGIKEY WORLDWIDE 2457 1 马上订购
RS COMPONENTS EUROPE 1062 1 马上订购
ARROW EUROPE 4050 0 马上订购
MOUSER WORLDWIDE 2125 1 马上订购
ANGLIA Live EUROPE 1000 1 马上订购

代理商库存报告日期: 2020-05-19

代理商名称

DIGIKEY

库存

2457

Min.Order

1

地区

WORLDWIDE 马上订购

RS COMPONENTS

库存

1062

Min.Order

1

地区

EUROPE 马上订购

ARROW

库存

4050

Min.Order

0

地区

EUROPE 马上订购

MOUSER

库存

2125

Min.Order

1

地区

WORLDWIDE 马上订购

ANGLIA Live

库存

1000

Min.Order

1

地区

EUROPE 马上订购

代理商库存报告日期: 2020-05-19

Operating Temperature (°C)

(最小值)

-40

(最大值)

85

供货状态

批量生产

Budgetary Price (US$)* / Qty

NVRAM size (B)

128

ECCN (US)

EAR99

Country of Origin

MALAYSIA

(*) 建议转售单价(美元)仅用于预算用途。如需以当地货币计价的报价,请联系您当地的 ST销售办事处 或我们的 经销商

适合您的资源

软件

00 选择要下载的文档

技术文档

    • 描述 版本 文档大小 操作
      DS3301
      5.0 V and 3.3/3.0 V secure serial RTC and NVRAM supervisor with tamper detection and 128 bytes of clearable NVRAM
      11.0
      1.06 MB
      PDF
      DS3301

      5.0 V and 3.3/3.0 V secure serial RTC and NVRAM supervisor with tamper detection and 128 bytes of clearable NVRAM

    • 描述 版本 文档大小 操作
      AN3060
      串行实时时钟(RTC)应用指南
      1.0
      453.19 KB
      PDF
      AN1011
      ST NVRAM 和实时时钟(RTC)产品中使用的电池技术
      4.0
      416.58 KB
      PDF
      AN1879
      如何使用M41ST87W的入侵检测及RAM清除功能
      1.0
      455.88 KB
      PDF
      AN934
      How to use the digital calibration feature in TIMEKEEPER® and serial real-time clock (RTC) products
      4.1
      123.42 KB
      PDF
      AN1216
      Implementing a periodic alarm with TIMEKEEPER® and serial real-time clocks (RTCs)
      2.0
      192.89 KB
      PDF
      AN4641
      集成TIMEKEEPER® 与实时时钟监控器功能
      1.0
      508.26 KB
      PDF
      AN923
      Managing century information using serial real-time clocks and TIMEKEEPER® NVRAMs
      4.0
      142.23 KB
      PDF
      AN1572
      串行实时时钟(RTC)的掉电时间戳功能
      2.0
      394.88 KB
      PDF
      AN1336
      Power-fail comparator for NVRAM supervisory devices
      2.0
      127.81 KB
      PDF
      AN1012
      预测NVRAM 和串行RTC 的电池寿命和数据保存期限
      1.0
      813.03 KB
      PDF
      AN3060

      串行实时时钟(RTC)应用指南

      AN1011

      ST NVRAM 和实时时钟(RTC)产品中使用的电池技术

      AN1879

      如何使用M41ST87W的入侵检测及RAM清除功能

      AN934

      How to use the digital calibration feature in TIMEKEEPER® and serial real-time clock (RTC) products

      AN1216

      Implementing a periodic alarm with TIMEKEEPER® and serial real-time clocks (RTCs)

      AN4641

      集成TIMEKEEPER® 与实时时钟监控器功能

      AN923

      Managing century information using serial real-time clocks and TIMEKEEPER® NVRAMs

      AN1572

      串行实时时钟(RTC)的掉电时间戳功能

      AN1336

      Power-fail comparator for NVRAM supervisory devices

      AN1012

      预测NVRAM 和串行RTC 的电池寿命和数据保存期限

硬件型号、CAD库及SVD

    • 描述 版本 文档大小 操作
      Ibis model 1.0
      14.7 KB
      ZIP

      Ibis model

出版刊物和宣传资料

    • 描述 版本 文档大小 操作
      Serial real-time clock ICs 1.0
      827.11 KB
      PDF

      Serial real-time clock ICs

产品型号 供货状态 封装 等级规格 符合RoHS级别 材料声明**
M41ST87WMX6TR
批量生产
SO28 WITH EMBEDDED CRYSTAL Industrial Ecopack1
M41ST87WSS6F
批量生产
SSOP 20 7.2x5.3 Industrial Ecopack2

M41ST87WMX6TR

Package:

SO28 WITH EMBEDDED CRYSTAL

Material Declaration**:

PDF XML

Marketing Status

批量生产

Package

SO28 WITH EMBEDDED CRYSTAL

Grade

Industrial

RoHS Compliance Grade

Ecopack1

M41ST87WSS6F

Package:

SSOP 20 7.2x5.3

Material Declaration**:

PDF XML

Marketing Status

批量生产

Package

SSOP 20 7.2x5.3

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) st.com上提供的材料声明表单可能是基于包装系列中最常用的封装的通用文档。因此,它们可能不是100%适用于特定的设备。有关特定设备的信息,请联系 销售支持