M41T00M STMICROELECTRONICS [STMicroelectronics], M41T00M Datasheet

M41T00M

Manufacturer Part Number

M41T00M

Description

Serial Access TIMEKEEPER

Manufacturer

STMICROELECTRONICS [STMicroelectronics]

Datasheet

1.M41T00M.pdf (15 pages)

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Download datasheet (102Kb)

DESCRIPTION

The M41T00 TIMEKEEPER

Serial TIMEKEEPER with a built-in 32.768kHz os-

cillator (external crystal controlled). Eight bytes of

the RAM are used for the clock/calendar function

and are configured in binary coded decimal (BCD)

format. Addresses and data are transferred serial-

ly via a two-line bi-directional bus. The built-in ad-

dress register is incremented automatically after

each write or read data byte.

Table 1. Signal Names

May 2000

OSCI

OCSO

FT/OUT

SDA

SCL

2.0V to 5.5V SUPPLY VOLTAGE

COUNTERS for SECONDS, MINUTES,

HOURS, DAY, DATE, MONTH, YEARS and

CENTURY

YEAR 2000 COMPLIANT

SOFTWARE CLOCK CALIBRATION

AUTOMATIC SWITCH-OVER and DESELECT

CIRCUITRY

ULTRA-LOW BATTERY SUPPLY CURRENT

of 1µA

LOW OPERATING CURRENT of 300µA

OPERATING TEMPERATURE of –40 to 85°C

AUTOMATIC LEAP YEAR COMPENSATION

SPECIAL SOFTWARE PROGRAMMABLE

OUTPUT

BAT

C BUS COMPATIBLE

Oscillator Input

Oscillator Output

Frequency Test / Output Driver

(Open Drain)

Serial Data Address Input / Output

Serial Clock

Battery Supply Voltage

Supply Voltage

Ground

RAM is a low power

Figure 1. Logic Diagram

Serial Access TIMEKEEPER

OSCI

SCL

150mil Width

V CC

V SS

SO8 (M)

M41T00

V BAT

M41T00

OSCO

SDA

FT/OUT

AI00530

1/15

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