PT7C4300 Datasheet, PDF (1/17 Pages) Pericom Semiconductor Corporation – Real-time Clock Module (I²c Bus)

Data Sheet
PT7C4300
Real-time Clock Module (I²C Bus)
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Features
Description
• Using external 32.768kHz quartz crystal
• Supports I²C-Bus's high speed mode (400 kHz)
• Includes time (Hour/Minute/Second) and calendar
(Year/Month/Date/Day) counter functions (BCD
code)
• Automatic power-fail detect and switch circuitry of
battery backup
• Operating range: 2.0V to 5.5V
• Software clock calibration
• Ultra-low battery supply current of 1µA
The PT7C4300 serial real-time clock is a low-power
clock/calendar with 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 the 24-
hour format indicator.
Ordering Information
Part Number
PT7C4300W
PT7C4300WE
Package
8-Pin SOIC
Lead free 8-Pin SOIC
Table 1 shows the basic functions of PT7C4300. More
details are shown in section: overview of functions.
Table 1. Basic functions of PT7C4300
Item
Function
Source: Crystal: 32.768kHz
1
Oscillator Oscillator enable/disable
Oscillator fail detect
2
Time
Time display
Century bit
12-hour
24-hour
Time count chain enable/disable
3
Programmable square wave output (Hz)
4
Programmable high/low level output
2-wire I²C bus
Communicat
5
ion
3-wire bus
Burst mode
6
Battery backup
7
Clock calibration
PT7C4300
√
√
-
-
√
√
√
512Hz
√
√
-
-
√
√
PT0222(02/06)
1
Ver: 0