M41T0

Description

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1

Description

The M41T0 real-time clock is a low power serial real-time clock 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

incremented automatically after each WRITE or READ data byte.

The M41T0 is supplied in 8-lead plastic small outline package.

Figure 1.

Logic diagram

Figure 2.

SOIC connections

1.

Table 1.

Signal names

OSCI

Oscillator input

OCSO

Oscillator output

OUT

Output driver (open drain)

SDA

Serial data address input / output

SCL

Serial clock

1.

No function

Supply voltage

Ground

AI07028

OSCI

VCC

M41T0

VSS

SCL

OSCO

SDA

OUT

1

SDA

VSS

SCL

OUT

OSCO

OSCI

VCC

NF

(1)

AI07029

M41T0

2

3

4

8

7

6

5