Torwards
AT8563
1 Chip Overview
AT8563 is a CMOS real-time clock/calendar chip optimized for low power consumption.
The timing counter consists of century, year, month, day, date, hour, minute and second bits.
External MPU can read or set the time as well as timer or alarmer when it is necessary. As
exchanging data by the advance serial bus I2C, lines number on PCB can be reduced
dramatically, which is very suitable in a complicated system.
The chip has the following features:
An external 32.768 kHz crystal is needed to generated time base
Wide operating supply voltage range: 1.0 to 5.5 V
Low back-up current; typical 0.25 µA at VDD = 3.0 V and Tamb = 25 °C
400 kHz two-wire I2C-bus interface (at VDD = 1.8 to 5.5 V)
Programmable clock output for peripheral devices: 32.768 kHz, 1024 Hz 32 Hz
and 1 Hz
Alarm and timer functions
Voltage-low detector
Integrated oscillator capacitor
Internal power-on reset
I2C-bus slave address: read A3H; write A2H
Typical Applications:
Mobile telephones
Portable instruments
OA equipments such as Fax machines
Battery powered products
Table 1 shows our ordering information for AT8563.
Table1 Ordering information
Type number
Package
Name
Name
DIP8
Description
quantity
100/tape
2500/reel
3000/reel
3000/reel
AT8563P
AT8563T
AT8563TS
AT8563S
plastic dual in-line package; 8 leads (300 mil)
plastic small outline package; 8 leads; body width 3.9 mm
plastic small outline package; 8 leads; body width 3.0 mm
plastic small outline package; 8 leads; body width 3.0 mm
SO8
SSO8
MSOP8
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1
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