STMicroelectronics | M41T93RMY6F

The M41T93RMY6F is a part of M41T series I2C RTC. It has an operating temperature ranging from -40 °C to +85 °C and it comes in SOIC-18 Packaging.

The M41T93 is a low-power serial SPI bus real-time clock with a built-in 32.768 kHz oscillator (external crystal-controlled for the QFN16 package, and embedded crystal for the SOX18 package). 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.

Features:

• Ultra-low battery supply current of 365 nA
• Factory calibrated accuracy ±5 ppm guaranteed after 2 reflows (SOX18)
  • Much better accuracies 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 (fixed reference)
  • M41T93R: VCC= 2.7 V to 5.5 V (2.55 V ≤ VRST≤ 2.70 V)
• Compatible with SPI bus serial interface (supports SPI mode 0 [CPOL = 0, CPHA = 0])
• Programmable alarm with interrupt function (valid even during battery back-up 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
• Power-down time stamp (HT bit)
• Low operating current of 80 μA
• Oscillator stop detection
• Battery or SuperCap™ backup
• Operating temperature of –40 °C to +85 °C
• Package options include:
  • a 16-lead QFN or an 18-lead embedded crystal SOIC
• RoHS compliance: lead-free components are compliant with the RoHS directive