M41T83 データシートの表示（PDF） - STMicroelectronics

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M41T83

Serial RTC with battery switchover

STMicroelectronics 

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

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