DS1672S-3(2011) Ver la hoja de datos (PDF) - Maxim Integrated

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Fabricante

DS1672S-3
(Rev.:2011)

I2C 32-Bit Binary Counter RTC

Maxim Integrated 

19-6032; Rev 9/11

DS1672

I2C 32-Bit Binary Counter RTC

GENERAL DESCRIPTION

The DS1672 incorporates a 32-bit counter and

power-monitoring functions. The 32-bit counter

is designed to count seconds and can be used to

derive time-of-day, week, month, month, and

year by using a software algorithm. A precision,

temperature-compensated reference and

comparator circuit monitors the status of VCC.

When an out-of-tolerance condition occurs, an

internal power-fail signal is generated that forces

the reset to the active state. When VCC returns to

an in-tolerance condition, the reset signal is kept

in the active state for a period of time to allow

the power supply and processor to stabilize.

TYPICAL OPERATING CIRCUIT

FEATURES

 32-Bit Counter

 I2C Serial Interface

 Automatic Power-Fail Detect and Switch

Circuitry

 Power-Fail Reset Output

 Low-Voltage Oscillator Operation

(1.3V min)

 Trickle-Charge Capability

 Underwriters Laboratories (UL) Recognized

 -40°C to +85°C Operating Range

PIN CONFIGURATION

TOP VIEW

X1

X2

VBACKUP

GND

1

8

DS1672

2

7

3

6

4

5

VCC

RST

SCL

SDA

PDIP

SO

µSOP

.

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