M41T60

Description

Doc ID 10396 Rev 13

5/27

1

Description

The M41T60 is a low power serial 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 bi-directional 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 16-lead QFN package.

Figure 1.

Logic diagram

1.

Open drain

Figure 2.

16-pin QFN connections

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)

Supply voltage

Ground

AI08869

XI

VCC

M41T60

VSS

XO

SCL

SDA

FT(1)

OFIRQ/OUT(1)

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

XI

XO

FT

(1)

NC

SCL

SDA

OFIRQ/OUT

(1)

AI08870