Features
· Ultra-low battery supply current of 365 nA
· Factory-calibrated accuracy of ±5 ppm typical
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)
– M41T83S: VCC = 3.00 V to 5.50 V
– M41T83R: VCC = 2.70 V to 5.50 V
– M41T83Z: VCC = 2.38 V to 5.50 V
· Serial interface supports I2C bus (400 kHz
protocol)
· Programmable alarm with interrupt function
(valid even during battery backup mode)
· Optional 2nd programmable alarm available
· Square wave output defaults to 32 KHz on
power-up (M41T83 only)
· 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 SuperCap™ backup
· Operating temperature of –40 °C to 85 °C
· Package options
– a 16-lead QFN (M41T83)
– an 8-lead SOIC (M41T82) or
– an 18-lead embedded crystal SOIC
(M41T83)
· RoHS compliance: lead-free components are
compliant with the RoHS directive