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M41T93ZMY6F
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  • M41T93ZMY6F
ID: 209800
Serial SPI bus real-time clock (RTC) with battery switchover, embedded crystal 32768 Hz, SOX18, STM, RoHS
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M41T93ZMY6F
Serial SPI bus real-time clock (RTC) with battery switchover, embedded crystal 32768 Hz, SOX18, STM, RoHS

The M41T93ZMY6F is a low-power serial SPI bus real-time clock (RTC) with a built-in 32.768 kHz oscillator. Eight bytes of the register map are used for the clock/calendar function and are configured in binary coded decimal (BCD) format. An additional 17 bytes of the register map provide status/control of the two alarms, watchdog, 8-bit counter, and square wave functions. An additional seven bytes are made available as user SRAM.

Addresses and data are transferred serially via a serial SPI bus-compatible interface. The built-in address register is incremented automatically after each WRITE or READ data byte. The M41T93ZMY6F 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 clock operations can be supplied by a small lithium button battery when a power failure occurs.

Features:

  • Ultra-low battery supply current of 365 nA
  • Factory calibrated accuracy ±5 ppm typical after 2 reflows (SOX18) (much better accuracies are achievable using built-in programmable analog and digital calibration circuits)
  • 2.0 V to 5.5 V clock operating voltage
  • Counters for tenths/hundredths of seconds, seconds, minutes, hours, day, date, month, year, and century
  • Automatic switchover and reset output circuitry: VCC= 2.38 V to 5.50 V
  • Compatible with SPI bus serial interface (supports SPI mode 0 [CPOL = 0, CPHA = 0])
  • Programmable alarm with interrupt function (valid even during battery backup mode)
  • Optional 2ndprogrammable alarm available
  • Square wave output (defaults to 32 KHz on power-up)
  • RESET (RST) output
  • Watchdog timer
  • Programmable 8-bit counter/timer
  • 7 bytes of battery-backed user SRAM
  • Battery low flag
  • Low operating current of 80 µA
  • Oscillator stop detection
  • Battery or supercapacitor backup
  • Operating temperature of –40 °C to +85 °C
  • Package: 18-lead embedded crystal SOIC

209800

Manufacturer

  • BTC Korporacja sp. z o. o.
  • Ludwinowo Zegrzyńskie 52G
  • 05-140 Ludwinowo Zegrzyńskie
  • Poland
  • [email protected]
  • 22 767 36 20

Responsible person

  • BTC Korporacja sp. z o. o.
  • Ludwinowo Zegrzyńskie 52G
  • 05-140 Ludwinowo Zegrzyńskie
  • Poland
  • [email protected]
  • 22 767 36 20

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