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REV: 031406

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

When an out-of-tolerance condition occurs, an

internal power-fail signal is generated that forces

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.

FEATURES

32-Bit Counter

Automatic Power-Fail Detect and Switch

Circuitry

Power-Fail Reset Output

Low-Voltage Oscillator Operation

(1.3V min)

Trickle-Charge Capability

Underwriters Laboratory (UL) Recognized

-40

°C to +85°C Operating Temperature

Range

PIN CONFIGURATION

*Purchase of I

Inc., or one of its sublicensed Associated Companies, conveys a

license under the Philips I

components in an I

to

the

I

DS1672

www.maxim-ic.com

TYPICAL OPERATING CIRCUIT

DIP

SO

µSOP

TOP VIEW

1

2

3

4

8

7

6

5

RST

SCL

SDA

X1

X2

GND

DS1672