M41T81SMY6F STMicroelectronics, M41T81SMY6F Datasheet - Page 8

• Manufacturer Part Number: M41T81SMY6F
• Description: IC RTC SER W/ALARMS 18-SOIC
• Manufacturer: STMicroelectronics
• Type: Clock/Calendar/Alarmr

Specifications of M41T81SMY6F

• 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)
• Function: Clock/Calendar/Alarm/Timer Interrupt
• Rtc Memory Size: 20 Byte
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.7 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Rtc Bus Interface: Serial (I2C)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-6157-2

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)