M41T65

M41T62, M41T64, M41T65 Datasheet Low-power serial real-time clocks (RTCs) with alarm 3mm 3mm QFN16 3 x 3 mm 1.5 mm 3.2 mm Embedded crystal LCC8 1.5 x 3.2 mm No external crystal required Maturity status link M41T62 M41T64 M41T65 Features Serial real-time clock (RTC) with alarm functions – 400 kHz I²C serial interface – Memory mapped registers for seconds, minutes, hours, day, date, month, year, and century – Tenths/hundredths of second register 350 nA timekeeping current at 3 V Time keeping down to 1.0 V 1.3 V to 4.4 V I²C bus operating voltage – 4.4 V max. VCC suitable for lithium-ion battery operation Low operating current of 35 µA (at 400 kHz I²C speed) 32 kHz square wave output is on at power-up. Suitable for driving a microcontroller in low-power mode. Can be disabled. (M41T62/64) Programmable 1 Hz to 32 kHz square wave output (M41T62/64) Programmable alarm with interrupt function (M41T62/65) 32 kHz crystal oscillator integrates crystal load capacitors, works with high series resistance crystals Oscillator stop detection monitors clock operation Accurate programmable watchdog – 62.5 ms to 31 minutes timeout Software clock calibration. Timekeeping can be adjusted within ± 2 parts per million (± 5 seconds per month) Automatic leap year compensation – 40 to + 85 °C operation Two package options – Very small 3 x 3 mm, lead-free and halogen-free (ECOPACK2) 16-lead QFN – Ultra small 1.5 x 3.2 mm, lead-free and halogen-free (ECOPACK2) 8-pin ...