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M41T82

Part Number	M41T82
Manufacturer	ST Microelectronics
Description	Serial RTC
Published	Mar 16, 2007
Detailed Description	www.DataSheet4U.com M41T82 M41T83 Serial RTC with battery switchover Features ■ ■ ■ 2.0 to 5.5V clock operating voltag...
Datasheet	M41T82 PDF File

Overview

www.
DataSheet4U.
com M41T82 M41T83 Serial RTC with battery switchover Features ■ ■ ■ 2.
0 to 5.
5V clock operating voltage Ultra-low battery supply current of 365nA Counters for tenths/hundredths of seconds, seconds, minutes, hours, day, date, month, year, and century Programmable clock calibration (analog and digital) Automatic switchover and reset output circuitry (fixed reference) – M41T83S VCC = 3.
00V to 5.
50V (2.
85V ≤ VRST ≤ 3.
00V) – M41T83R VCC = 2.
70V to 5.
50V (2.
55V ≤ VRST ≤ 2.
70V) – M41T83Z VCC = 2.
38V to 5.
50V (2.
25V ≤ VRST ≤ 2.
38V) Serial interface supports I2C Bus (400kHz protocol) Programmable alarm with interrupt function (valid even during battery back-up mode) Optional 2nd programmable alarm available Square wave output defaults to 32KHz 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 80µA ■ QFN16, 4mm x 4mm (QA) (VFQFPN16) ■ ■ 18 1 SOX18 (MY, 18-pin, 300mil SOIC with Embedded Crystal)1 SO8 (M) 1.
Contact local ST sales office for availability of SOX18 package.
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Oscillator stop detection Battery or Super-cap™ back-up 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.
March 2007 Rev 4 1/58 www.
st.
com 1 Contents M41T82 M41T83 Contents 1 2 Description .
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6 Operation .
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14 2.
1 2-Wire bus characteristics .
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15 2.
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5 Bus not busy .
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