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M41ST85WMH Datasheet (PDF) - STMicroelectronics

M41ST85WMH Datasheet PDF - STMicroelectronics
Part # M41ST85WMH
Download  M41ST85WMH Download

File Size   530.95 Kbytes
Page   34 Pages
Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics
Description 5.0 OR 3.0V, 512 bit 64 x 8 SERIAL RTC and NVRAM SUPERVISOR

M41ST85WMH Datasheet (PDF)

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M41ST85WMH Datasheet PDF - STMicroelectronics

Part # M41ST85WMH
Download  M41ST85WMH Click to download

File Size   530.95 Kbytes
Page   34 Pages
Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics
Description 5.0 OR 3.0V, 512 bit 64 x 8 SERIAL RTC and NVRAM SUPERVISOR

M41ST85WMH Datasheet (HTML) - STMicroelectronics

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M41ST85WMH Product details

SUMMARY DESCRIPTION

The M41ST85Y/W Serial TIMEKEEPER®/Controller SRAM is a low power 512-bit, static CMOS SRAM organized as 64 words by 8 bits. A built-in 32.768 kHz oscillator (external crystal controlled) and 8 bytes of the SRAM (see Table 2., page 14) are used for the clock/calendar function and are configured in binary coded decimal (BCD) format.



FEATURES SUMMARY

■ 5.0 OR 3.0V OPERATING VOLTAGE

■ SERIAL INTERFACE SUPPORTS I2C BUS(400 KHz)

■ NVRAM SUPERVISOR FOR EXTERNAL LPSRAM

■ OPTIMIZED FOR MINIMAL INTERCONNECT TO MCU

■ 2.5 TO 5.5V OSCILLATOR OPERATING VOLTAGE

■ AUTOMATIC SWITCH-OVER AND DESELECT CIRCUITRY

■ CHOICE OF POWER-FAIL DESELECT VOLTAGES

– M41ST85Y: VCC= 4.5 to 5.5V; 4.20V ≤VPFD ≤4.50V

– M41ST85W: VCC= 2.7 to 3.6V; 2.55V ≤VPFD ≤2.70V

■ 1.25V REFERENCE (for PFI/PFO)

■ COUNTERS FOR TENTHS/HUNDREDTHS OF SECONDS, SECONDS, MINUTES, HOURS, DAY, DATE, MONTH, YEAR, AND

CENTURY

■ 44 BYTES OF GENERAL PURPOSE RAM

■ PROGRAMMABLE ALARM AND INTERRUPT FUNCTION (VALID EVEN DURING BATTERY BACK-UP MODE)

■ WATCHDOG TIMER

■ MICROPROCESSOR POWER-ON RESET

■ BATTERY LOW FLAG

■ POWER-DOWN TIMESTAMP (HT BIT)

■ ULTRA-LOW BATTERY SUPPLY CURRENT OF 500nA (MAX)

■ PACKAGING INCLUDES A 28-LEAD SOIC AND SNAPHAT® TOP (to be ordered separately)

■ SOIC SNAPHAT PACKAGE PROVIDES DIRECT CONNECTION FOR A SNAPHAT TOP WHICH CONTAINS THE BATTERY

AND CRYSTAL

■ SOIC EMBEDDED CRYSTAL PACKAGE (MX) OPTION

Fi

Fi




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About STMicroelectronics


STMicroelectronics is a multinational electronics and semiconductor manufacturer based in Geneva, Switzerland.

The company offers a wide range of products including microcontrollers, sensors, power amplifiers, and integrated circuits for various applications in the automotive, industrial, and consumer markets.

Founded in 1987, STMicroelectronics has operations in over 100 countries and is one of the largest semiconductor companies in the world.

*This information is for general informational purposes only, we will not be liable for any loss or damage caused by the above information.




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