DS1306
Serial Alarm Real-Time Clock
BENEFITS AND FEATURES
•
•
PIN CONFIGURATIONS
Completely Manages All Timekeeping
Functions
o Real-Time Clock (RTC) Counts Seconds,
Minutes, Hours, Date of the Month,
Month, Day of the Week, and Year with
Leap-Year Compensation Valid Up to
2100
o 96-Byte, Battery-Backed NV RAM for
Data Storage
o Two Time-Of-Day Alarms,
Programmable on Combination of
Seconds, Minutes, Hours, and Day of the
Week
o 1Hz and 32.768kHz Clock Outputs
1
2
3
4
5
6
7
8
9
10
VCC2
VBAT
X1
N.C.
X2
N.C.
INT0
INT1
1Hz
GND
VCC1
N.C.
32kHz
VCCIF
SDO
SDI
SCLK
N.C.
CE
SERMODE
20
19
18
17
16
15
14
13
12
11
TSSOP (4.4mm)
VCC2
14
VCCIF
X2
4
13
SDO
INT0
INT1
5
12
SDI
6
11
SCLK
1Hz
7
10
CE
GND
8
9
SERMODE
DIP (300 mils)
20-Pin TSSOP Minimizes Required Space
•
32kHz
3
Optional Industrial Temperature Range:
-40°C to +85°C Supports Operation in a
Wide Range of Applications
•
15
Multiple Power Supply Pins Ease Adding
Battery for Backup
o Dual-Power Supply Pins for Primary and
Backup Power Supplies
o Optional Trickle Charge Output to
Backup Supply
o 2.0V to 5.5V Operation
•
VCC1
2
X1
•
16
VBAT
Standard Serial Port Interfaces with Most
Microcontrollers
o Supports Motorola SPI (Serial Peripheral
Interface) Modes 1 and 3 or Standard
3-Wire Interface
o Burst Mode for Reading/Writing
Successive Addresses in Clock/RAM
1
Underwriters Laboratory (UL®) Recognized
UL is a registered trademark of Underwriters Laboratories Inc.
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19-5056; Rev 4/15
