M41T81SMY6F STMicroelectronics, M41T81SMY6F Datasheet - Page 12

• 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

Operation
12/32
An alternate READ mode may also be implemented whereby the master reads the
M41T81S slave without first writing to the (volatile) address pointer. The first address that is
read is the last one stored in the pointer (see
Figure 7.
Figure 8.
Figure 9.
BUS ACTIVITY:
MASTER
SDA LINE
BUS ACTIVITY:
BUS ACTIVITY:
MASTER
SDA LINE
BUS ACTIVITY:
Slave address location
READ mode sequence
Alternative READ mode sequence
S
S
START
ADDRESS
ADDRESS
SLAVE
SLAVE
DATA n+X
Doc ID 10773 Rev 6
ADDRESS (An)
1
WORD
DATA n
1
P
SLAVE ADDRESS
0
S
1
ADDRESS
Figure 9 on page
SLAVE
0
DATA n+1
0
0
R/W
DATA n
A
12).
DATA n+1
DATA n+X
M41T81S
AI00602
AI00895
P
AI00899