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M41ST87Y - 5.0 V and 3.3/3.0 V secure serial RTC and NVRAM supervisor

Download the M41ST87Y datasheet PDF. This datasheet also covers the M41ST87W variant, as both devices belong to the same 5.0 v and 3.3/3.0 v secure serial rtc and nvram supervisor family and are provided as variant models within a single manufacturer datasheet.

General Description

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Key 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 compara.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (M41ST87W_STMicroelectronics.pdf) that lists specifications for multiple related part numbers.

📁 Similar Datasheet

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M41ST85W 5.0 OR 3.0V / 512 bit 64 x 8 SERIAL RTC and NVRAM SUPERVISOR ST Microelectronics
M41ST85Y 5.0 OR 3.0V / 512 bit 64 x 8 SERIAL RTC and NVRAM SUPERVISOR ST Microelectronics
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Other Datasheets by STMicroelectronics

Part Number Description
M41ST87W 5.0 V and 3.3/3.0 V secure serial RTC and NVRAM supervisor
M41T00AUD Serial real-time clock
M41T00CAP Serial access real-time clock
M41T00S Serial real-time clock
M41T00SC64 Real-Time Clock 64-Kbit EEPROM

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
M41ST87Y M41ST87W 5.0 V and 3.3/3.0 V secure serial RTC and NVRAM supervisor with tamper detection and 128 bytes of clearable NVRAM 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.