|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||

Product Features

Using external 32.768kHz quartz crystal

PT0205(02/07)

Ver: 1

1

Data Sheet

PT7C4337

Real-time Clock Module (I

2

C Bus)

Supports I

2

C-Bus's high speed mode (400 kHz)

Includes time (Hour/Minute/Second) and calendar

(Year/Month/Date/Day) counter functions (BCD

code)

Programmable square wave output signal

Two Time-of-Day Alarms

Oscillator Stop Flag

Ordering Information

Part Number

PT7C4337PE

PT7C4337WE

PT7C4337UE

Operating range: 1.8V to 5.5V

Package

Lead free 8-Pin DIP

Lead free 8-Pin SOIC

Lead free 8-Pin MSOP

Product Description

The PT7C4337 serial real-time clock is a low-power

clock/calendar with two programmable time-of-day

alarms and a programmable square-wave output.

Address and data are transferred serially via a 2-wire,

bidirectional bus. The clock/calendar provides seconds,

minutes, hours, day, date, month, and year information.

The date at the end of the month is automatically

adjusted for months with fewer than 31 days, including

corrections for leap year. The clock operates in either the

24-hour or 12-hour format with AM/PM indicator.

Table 1 shows the basic functions of PT7C4337. More

details are shown in section: overview of functions.

Table 1.

Basic functions of PT7C4337

Item

Function

PT7C4337

Crystal: 32.768kHz

√

Source

External input

√

Oscillator enable/disable

√

1

Oscillator

Oscillator fail detect

√

12-hour

√

Time display

24-hour

√

2

Time

Century bit

√

3

Alarm interrupt

√

2

4

Programmable square wave output (Hz)

1, 4.096k, 8.192k, 32.768k