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M41ST87W Folha de dados (PDF) - STMicroelectronics

M41ST87W Datasheet PDF - STMicroelectronics
Nome de Peças M41ST87W
Download  M41ST87W Download

Tamanho do Arquivo   733.27 Kbytes
página   42 Pages
Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics
Descrição Electrónicos 5.0, 3.3, or 3.0V, 1280 bit (160 x8) Secure Serial RTC and NVRAM Supervisor with Tamper Detection

M41ST87W Datasheet (PDF)

Go To PDF Page Download Folha de dados
M41ST87W Datasheet PDF - STMicroelectronics

Nome de Peças M41ST87W
Download  M41ST87W Click to download

Tamanho do Arquivo   733.27 Kbytes
página   42 Pages
Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics
Descrição Electrónicos 5.0, 3.3, or 3.0V, 1280 bit (160 x8) Secure Serial RTC and NVRAM Supervisor with Tamper Detection

M41ST87W Folha de dados (HTML) - STMicroelectronics

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M41ST87W Detalhes do produto

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




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Sobre a STMicroelectronics


A STMicroelectronics é um fabricante multinacional de eletrônicos e semicondutores com sede em Genebra, Suíça.

A empresa oferece uma ampla gama de produtos, incluindo microcontroladores, sensores, amplificadores de energia e circuitos integrados para várias aplicações nos mercados automotivo, industrial e de consumo.

Fundada em 1987, a STMicroelectronics possui operações em mais de 100 países e é uma das maiores empresas de semicondutores do mundo.

*Esta informação é apenas para fins informativos gerais, não seremos responsáveis por qualquer perda ou dano causado pelas informações acima.




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