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M41T83SQA6E Datasheet(PDF) 1 Page - STMicroelectronics |
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M41T83SQA6E Datasheet(HTML) 1 Page - STMicroelectronics |
1 / 61 page October 2010 Doc ID 12578 Rev 12 1/61 1 M41T82 M41T83 Serial I2C bus RTC with battery switchover 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) –M41T83S VCC = 3.00 V to 5.50 V (2.85 V ≤ VRST ≤ 3.00 V) –M41T83R VCC = 2.70 V to 5.50 V (2.55 V ≤ VRST ≤ 2.70 V) –M41T83Z VCC = 2.38 V to 5.50 V (2.25 V ≤ VRST ≤ 2.38 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 ■ 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 (M41T83), – an 18-lead embedded crystal SOIC (M41T83), or – an 8-lead SOIC (M41T82) ■ RoHS compliance: lead-free components are compliant with the RoHS directive SOX18 (18-pin, 300 mil SOIC QFN16, 4 mm x 4 mm (QA) SO8 (M) with embedded crystal) (MY) (VFQFPN16) 1 18 www.st.com |
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