M41T83_12 datasheet(1/62 Pages) STMICROELECTRONICS

Part #	M41T83

Description	Serial I2C bus real-time clock (RTC) with battery switchover

PDF	62 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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1 / 62 page

This is information on a product in full production.

October 2012

Doc ID 12578 Rev 15

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1

M41T82

M41T83

Serial I2C bus real-time clock (RTC) with battery switchover

Datasheet

− production data

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

(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

■ 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

SOX18, embedded crystal (300 mil)

QFN16 (4 mm x 4 mm)

SO8 (150 mil)

1

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