M41T81SMY6E STMicroelectronics, M41T81SMY6E Datasheet - Page 8

• Manufacturer Part Number: M41T81SMY6E
• Description: IC RTC SER W/ALARMS 18-SOIC
• Manufacturer: STMicroelectronics
• Type: Clock/Calendar/Alarmr

Specifications of M41T81SMY6E

• Memory Size: 20B
• Time Format: HH:MM:SS:hh (24 hr)
• Date Format: YY-MM-DD-dd
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 18-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Description
Figure 4.
1. Open drain output
2. Square wave function has the highest priority on IRQ/FT/OUT/SQW output.
8/32
CRYSTAL
V
SDA
SCL
CC
Block diagram
V
BAT
V
V
PFD
SO
OSCILLATOR
INTERFACE
COMPARE
32KHz
I
2
C
PROTECT
WRITE
Doc ID 10773 Rev 6
FREQUENCY TEST
REAL TIME CLOCK
OSCILLATOR FAIL
OUTPUT DRIVER
& CALIBRATION
SQUARE WAVE
RTC W/ALARM
WATCHDOG
CALENDAR
CIRCUIT
INTERNAL
POWER
OFIE
AFE
SQWE
FT
OUT
(2)
IRQ/FT/OUT/SQW
M41T81S
AI09163
(1)