DS1339 Maxim, DS1339 Datasheet - Page 6

• Manufacturer Part Number: DS1339
• Description: The DS1339 serial real-time clock (RTC) is a low-power clock/date device with two programmable time-of-day alarms and a programmable square-wave output
• Manufacturer: Maxim

Figure 2. Timing Diagram
Figure 3. Block Diagram
"C" version only
V
BACKUP
GND
SDA
SCL
V
CC
X
1
X
2
INTERFACE AND
C
C
Power Control
SERIAL BUS
L
L
REGISTER
ADDRESS
Oscillator
divider
and
1Hz/4.096kHz/8.192kHz/32.768kHz
CONTROL
DS1339
LOGIC
6 of 20
1Hz
CHARGE, AND
USER BUFFER
CLOCK AND
REGISTERS
REGISTERS
CALENDAR
BUFFER
CONTROL
(7 BYTES)
TRICKLE
MUX/
ALARM,
DS1339 I
N
2
C Serial Real-Time Clock
SQW/INT