M41T82 datasheet(1/61 Pages) STMICROELECTRONICS

부품명	M41T82

상세설명	Serial I2C bus RTC with battery switchover

PDF	61 Pages

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제조업체	STMICROELECTRONICS [STMicroelectronics]

홈페이지	http://www.st.com

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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

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M41T82 데이터시트(PDF) 1 Page - STMicroelectronics

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