M41T0 데이터 시트보기 (PDF) - Unspecified

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M41T0

Serial real-time clock

Unspecified 

M41T0

1

Description

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

VCC

OSCI

SCL

M41T0

OSCO

SDA

OUT

VSS

AI07028

Figure 2. SOIC connections

M41T0

OSCI 1

OSCO 2

NF(1) 3

VSS 4

8 VCC

7 OUT

6 SCL

5 SDA

AI07029

1. NF pin must be tied to VSS.

Table 1.

OSCI

Signal names

Oscillator input

OCSO

Oscillator output

OUT

Output driver (open drain)

SDA

Serial data address input / output

SCL

NF(1)

Serial clock

No function

VCC

Supply voltage

VSS

Ground

1. NF pin must be tied to VSS.

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