Datasheet

DocID10396 Rev 14 5/28
M41T60 Description
1 Description
The M41T60 is a low-power serial real-time clock (RTC) with a built-in 32.768 kHz oscillator
(external crystal controlled). Eight registers are used for the clock/calendar function and are
configured in binary-coded decimal (BCD) format. Addresses and data are transferred
serially via a two-line, bidirectional bus. The built-in address register is increased
automatically after each WRITE or READ data byte.
The eight clock address locations contain the century, year, month, date, day, hour, minute,
and second in 24-hour BCD format. Corrections for 28-, 29- (leap year), 30-, and 31-day
months are made automatically.
The M41T60 is supplied in a 16-lead QFN package.
Figure 1. Logic diagram
1. Open drain
Table 1. Signal names
XI Oscillator input
XO Oscillator output
FT Frequency test output (open drain)
SDA Serial data address input/output
SCL Serial clock
OFIRQ
/OUT Oscillator fail interrupt/out output (open drain)
V
CC
Supply voltage
V
SS
Ground
AI08869
XI
V
CC
M41T60
V
SS
XO
SCL
SDA
FT
(1)
OFIRQ/OUT
(1)