DS1306

2 of 22

ORDERING INFORMATION

PART

TEMP RANGE

PIN-PACKAGE

TOP MARK*

DS1306

0°C to +70°C

16 DIP (300 mils)

DS1306

DS1306+

0°C to +70°C

16 DIP (300 mils)

DS1306 +

DS1306N

-40°C to +85°C

16 DIP (300 mils)

DS1306N

DS1306N+

0°C to +70°C

16 DIP (300 mils)

DS1306N +

DS1306E

0°C to +70°C

20 TSSOP (173 mils)

DS1306

DS1306E+

0°C to +70°C

20 TSSOP (173 mils)

DS1306 +

DS1306EN

-40°C to +85°C

20 TSSOP (173 mils)

DS1306N

DS1306EN+

-40°C to +85°C

20 TSSOP (173 mils)

DS1306N +

DS1306EN/T&R

-40°C to +85°C

20 TSSOP (173 mils)

DS1306N

DS1306EN+T&R

-40°C to +85°C

20 TSSOP (173 mils)

DS1306N +

DS1306E/T&R

0°C to +70°C

20 TSSOP (173 mils)

DS1306

DS1306E+T&R

0°C to +70°C

20 TSSOP (173 mils)

DS1306 +

+Denotes a lead(Pb)-free/RoHS-compliant package

T&R = Tape and reel.

*An “N” on the top mark indicates an industrial device.

PIN DESCRIPTION

PIN

TSSOP

DIP

NAME

FUNCTION

1

1

Backup Power Supply. This is the secondary power supply pin. In systems

using the trickle charger, the rechargeable energy source is connected to this

pin.

2

2

Battery Input for Any Standard +3V Lithium Cell or Other Energy

result. UL recognized to ensure against reverse charging current when used

in conjunction with a lithium battery. See “Conditions of Acceptability” at

www.maxim-ic.com/TechSupport/QA/ntrl.htm.

3

3

X1

5

4

X2

Connections for Standard 32.768kHz Quartz Crystal. The internal

oscillator is designed for operation with a crystal having a specified load

capacitance of 6pF. For more information on crystal selection and crystal

layout considerations, refer to Application Note 58, “Crystal Considerations

with Dallas Real-Time Clocks.” The DS1306 can also be driven by an

external 32.768kHz oscillator. In this configuration, the X1 pin is connected

to the external oscillator signal and the X2 pin is floated.

7

5

INT0

Active-Low Interrupt 0 Output. The

INT0 pin is an active-low output of

the DS1306 that can be used as an interrupt input to a processor. The

INT0

pin can be programmed to be asserted by Alarm 0. The

INT0 pin remains

low as long as the status bit causing the interrupt is present and the

corresponding interrupt enable bit is set. The

INT0 pin operates when the

output and requires an external pullup resistor.

8

6

INT1

Interrupt 1 Output. The INT1 pin is an active-high output of the DS1306

that can be used as an interrupt input to a processor. The INT1 pin can be

programmed to be asserted by Alarm 1. When an alarm condition is present,

the INT1 pin generates a 62.5ms active-high pulse. The INT1 pin operates

internally pulled low.