M41T82ZM6F STMicroelectronics, M41T82ZM6F Datasheet - Page 6

• Manufacturer Part Number: M41T82ZM6F
• Description: IC RTC SERIAL W/BATT SW 8-SOIC
• Manufacturer: STMicroelectronics
• Type: Clock/Calendar/Alarmr

Specifications of M41T82ZM6F

• Memory Size: 32B
• Time Format: HH:MM:SS:hh (24 hr)
• Date Format: YY-MM-DD-dd
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 2.38 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-7828-2; M41T82ZM6F

Description
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Description
The M41T8x are low power serial I
(external crystal-controlled for the QFN16 and SO8 packages, embedded crystal for the
SOX18 package). Eight bytes of the register map (see
clock/calendar function and are configured in binary coded decimal (BCD) format. An
additional 17 bytes of the register map provide status/control of the two alarms, watchdog,
8-bit counter, and square wave functions. An additional seven bytes are made available as
user SRAM.
Addresses and data are transferred serially via a two-line, bidirectional I
built-in address register is incremented automatically after each WRITE or READ data byte.
The M41T8x has a built-in power sense circuit which detects power failures and
automatically switches to the battery supply when a power failure occurs. The energy
needed to sustain the clock operations can be supplied by a small lithium button battery
when a power failure occurs.
Functions available to the user include a non-volatile, time-of-day clock/calendar, two alarm
interrupts, watchdog timer, programmable 8-bit counter, and square wave outputs. The eight
clock address locations contain the century, year, month, date, day, hour, minute, second,
and tenths/hundredths of a second in 24-hour BCD format. Corrections for 28, 29 (leap
year), 30, and 31 day months are made automatically. The M41T83 is supplied in either a
QFN16 (QA) or an SOX18 (MY), 300 mil SOIC which includes an embedded 32 KHz crystal.
The SOX18 package requires only a user-supplied battery to provide non-volatile operation.
The M41T82 is available only in an SO8 (M) package.
Doc ID 12578 Rev 12
2
C real-time clocks with a built-in 32.768 kHz oscillator
Table 2 on page
21) are used for the
2
C interface. The
M41T82-M41T83