MAXIM DS1339 Technical data

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GENERAL DESCRIPTION

The DS1339 serial real-time clock (RTC) is a lowpower clock/date device with two programmable timeof-day alarms and a programmable square-wave output. Address and data are transferred serially through an I

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C* bus. The clock/date 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 either the 24-hour or 12-hour format with AM/PM indicator. The DS1339 has a built-in powersense circuit that detects power failures and automatically switches to the backup supply, maintaining time and date operation.

APPLICATIONS

Handhelds (GPS, POS Terminals) Consumer Electronics (Set-Top Box, Digital

Recording, Network Appliance) Office Equipment (Fax/Printers, Copier) Medical (Glucometer, Medicine Dispenser) Telecommunications (Routers, Switches, Servers) Other (Utility Meter, Vending Machine, Thermostat,

Modem

)

DS1339

I2C Serial Real-Time Clock

FEATURES

§ Real-Time Clock (RTC) Counts Seconds, Minutes, Hours, Day, Date, Month, and Year with LeapYear Compensation Valid Up to 2100

§ Available in a Surface-Mount Package with an Integrated Crystal (DS1339C)

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§ I

C Serial Interface

§ Two Time-of-Day Alarms

§ Programmable Square-Wave Output

§ Oscillator Stop Flag

§ Automatic Power-Fail Detect and Switch Circuitry

§ Trickle-Charge Capability

§ Underwriters Laboratory (UL) Recognized

Pin Configurations appear at end of data sheet.

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C is a trademark of Philips Corp. Purchase of I2C components

*I from Maxim Integrated Products, Inc., or one of its sublicensed Associated Companies, conveys a license under the Philips I Patent Rights to use these components in an I that the system conforms to the I defined by Philips.

2

C Standard Specification as

2

C system, provided

2

C

ORDERING INFORMATION

PART TEMP RANGE VOLTAGE (V) PIN-PACKAGE TOP MARK*

DS1339C-2 -40°C to +85°C 2.0 16 SO (300 mils) DS1339C-2 DS1339C-2+ -40°C to +85°C 2.0 16 SO (300 mils) DS1339C-2 DS1339C-3 -40°C to +85°C 3.0 16 SO (300 mils) DS1339C-3 DS1339C-3+ -40°C to +85°C 3.0 16 SO (300 mils) DS1339C-3 DS1339C-33 -40°C to +85°C 3.3 16 SO (300 mils) DS1339C-33 DS1339C-33+ -40°C to +85°C 3.3 16 SO (300 mils) DS1339C-33 DS1339U-2 -40°C to +85°C 2.0 DS1339U-3 -40°C to +85°C 3.0 DS1339U-3+ -40°C to +85°C 3.0 DS1339U-33 -40°C to +85°C 3.3 DS1339U-33+ -40°C to +85°C 3.3

+ Denotes a lead-free/RoHS-compliant device. ## = second line, revision code

2 = 2.0V (V 3 = 3.0V (V 33 = 3.3V (V * A “+” on the top mark indicates a lead-free device.

±10%)

CC

±10%)

CC

±10%)

CC

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8 mSOP 8 mSOP 8 mSOP 8 mSOP 8 mSOP

1339 ##-2 1339 ##-3 1339 ##-3 1339 ##-33 1339 ##-33

REV: 071205

DS1339 I2C Serial Real-Time Clock

ABSOLUTE MAXIMUM RATINGS

Voltage Range on Any Pin Relative to Ground………………………………………………………………-0.3V to +6.0V Operating Temperature Range…(Noncondensing)….…………………………………………………….-40°C to +85°C Storage Temperature Range………………………………………………………………………………..-55°C to +125°C Soldering Temperature Range………….See precautions in the Handling, PC Board Layout, and Assembly section.

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to the absolute maximum rating conditions for extended periods may affect device reliability.

RECOMMENDED DC OPERATING CONDITIONS

(TA = -40°C to +85°C) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

DS1339-2 1.8 2.0 2.2

Supply Voltage VCC

DS1339-3 2.7 3.0 3.3

DS1339-33 2.97 3.3 3.63

V

Backup Supply Voltage V Pullup Resistor Voltage (SQW/INT,

SDA, SCL), V

CC

= 0V

Logic 1 VIH

Logic 0 VIL -0.5

1.3 3.0 3.7 V

BACKUP

V

5.5 V

PU

0.7 x V

CC

V

CC

0.5

+

+0.3 x

V

CC

DS1339-2 1.58 1.70 1.80

Power-Fail Voltage VPF

DS1339-3 2.45 2.59 2.70

DS1339-33 2.70 2.85 2.97

DC ELECTRICAL CHARACTERISTICS

(VCC = MIN to MAX, TA = -40°C to +85°C.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Input Leakage ILI (Note 2) 1

I/O Leakage ILO (Note 3) 1

Logic 0 Out V

= 0.4V; VCC > VCC MIN (-3, -33);

OL

≥ 2.0V (-2)

V

CC

Logic 0 Out V

= 0.2 (VCC);

OL

1.8V < V

< 2.0V (DS1339-2)

CC

Logic 0 Out V

= 0.2 (VCC);

OL

1.3V < V

< 1.8V (DS1339-2)

CC

VCC Active Current I

VCC Standby Current I

I

(Note 3) 3 mA

OL

I

(Note 3) 3 mA

OL

(Note 3) 250

I

OL

(Note 4) 450

CCA

(Note 5) 80 150

CCS

V

mA

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DC ELECTRICAL CHARACTERISTICS (continued)

(VCC = MIN to MAX, TA = -40°C to +85°C.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

DS1339 I2C Serial Real-Time Clock

Trickle-Charger Resistor Register 10h = A5h, V

= Typ, V

CC

BACKUP

= 0V

Trickle-Charger Resistor Register 10h = A6h, V

= Typ, V

CC

BACKUP

= 0V

Trickle-Charger Resistor Register 10h = A7h, V

V

Leakage Current I

BACKUP

= Typ, V

CC

BACKUP

= 0V

R1 250

R2 2000

R3 4000

25 100 nA

BKLKG

DC ELECTRICAL CHARACTERISTICS

(VCC = 0V, TA = -40°C to +85°C.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

I

V

Current EOSC = 0, SQW Off

BACKUP

Current EOSC = 0, SQW On

BACKUP

Current EOSC = 1

BACKUP

(Note 6) 400 700 nA

BKOSC

I

(Note 6) 600 1000 nA

BKSQW

I

(Note 6) 10 100 nA

BKDR

W

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AC ELECTRICAL CHARACTERISTICS

(VCC = MIN to MAX, TA = -40°C to +85°C.) (Note 12)

PARAMETER SYMBOL CONDITION MIN TYP MAX UNITS

DS1339 I2C Serial Real-Time Clock

SCL Clock Frequency f

Bus Free Time Between a STOP and START Condition

Hold Time (Repeated) START Condition (Note 7)

t

LOW Period of SCL Clock t

HIGH Period of SCL Clock t

Setup Time for a Repeated START Condition

t

Data Hold Time (Notes 8, 9) t

Data Setup Time (Note 10) t

Rise Time of Both SDA and SCL Signals (Note 11)

Fall Time of Both SDA and SCL Signals (Note 11)

Setup Time for STOP Condition t

SCL

t

BUF

HD:STA

LOW

HIGH

SU:STA

HD:DAT

SU:DAT

t

R

t

F

SU:STO

Fast mode 100 400

Standard mode 100

Fast mode 1.3

Standard mode 4.7

Fast mode 0.6

Standard mode 4.0

Fast mode 1.3

Standard mode 4.7

Fast mode 0.6

Standard mode 4.0

Fast mode 0.6

Standard mode 4.7

Fast mode 0 0.9

Standard mode 0

Fast mode 100

Standard mode 250

Fast mode 20 + 0.1CB 300

Standard mode 20 + 0.1CB 1000

Fast mode 20 + 0.1CB 300

Standard mode 20 + 0.1C

300

B

Fast mode 0.6

Standard mode 4.0

kHz

ms

ns

ms

Capacitive Load for Each Bus Line (Note 11)

I/O Capacitance (SDA, SCL) C

Oscillator Stop Flag (OSF) Delay t

C

400 pF

B

(Note 12) 10 pF

I/O

(Note 13) 100 ms

OSF

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POWER-UP/DOWN CHARACTERISTICS

(TA = -40C to +85°C) (Note 1, Figure 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

DS1339 I2C Serial Real-Time Clock

Recovery at Power-Up t

VCC Fall Time; V

VCC Rise Time; V

PF(MAX)

PF(MIN)

to V

t

PF(MIN)

t

PF(MAX)

(Note 14) 2 ms

REC

300

VCCF

0

VCCR

ms

WARNING: Under no circumstances are negative undershoots, of any amplitude, allowed when device is in battery-backup mode.

Note 1:

Note 2:

Note 3:

Note 4:

Note 5:

Note 6:

Note 7:

Note 8:

Note 9:

Note 10:

Note 11:

Note 12:

Note 13:

Note 14:

Limits at -40°C are guaranteed by design and are not production tested.

SCL only. SDA and SQW/INT.

—SCL at fSC max, VIL = 0.0V, VIH = VCC, trickle charger disabled.

I

CCA

Specified with the I

Using recommended crystal on X1 and X2.

After this period, the first clock pulse is generated.

A device must internally provide a hold time of at least 300ns for the SDA signal (referred to the V the undefined region of the falling edge of SCL.

The maximum t

A fast-mode device can be used in a standard-mode system, but the requirement t automatically the case if the device does not stretch the LOW period of the SCL signal. If such a device does stretch the LOW period of the SCL signal, it must output the next data bit to the SDA line t is released.

C

—total capacitance of one bus line in pF.

B

Guaranteed by design. Not production tested.

The parameter t V

£ V

CC

CCMAX

This delay applies only if the oscillator is running. If the oscillator is disabled or stopped, no power-up delay occurs.

2

C bus inactive, VIL = 0.0V, VIH = VCC, trickle charger disabled.

of the SCL signal) to bridge

IHMIN

need only be met if the device does not stretch the LOW period (t

HD:DAT

R(MAX) + tSU:DAT

is the period of time the oscillator must be stopped for the OSF flag to be set over the voltage range of 0.0V £

OSF

and 1.3V £ V

BACKUP

£ 3.7V.

) of the SCL signal.

LOW

³ to 250ns must then be met. This is

SU:DAT

= 1000 + 250 = 1250ns before the SCL line

Figure 1. Power-Up/Down Timing

V

CC

V

PF(MAX)

V

PF(MIN)

INPUTS

OUTPUTS

t

VCCF

RECOGNIZED

VALID

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DON'T CARE

HIGH-Z

t

VCCR

t

REC

RECOGNIZED

VALID

Figure 2. Timing Diagram

A

/

r

DS1339 I2C Serial Real-Time Clock

Figure 3. Block Diagram

X1

X2

V

CC

VBACKUP

SCL

SDA

OSCILLATOR AND

INTERFACE AND

"C" VERSION

ONLY

DIVIDER

POWER

CONTROL

SERIAL BUS

DDRESS

REGISTER

1Hz/4.096kHz/8.192kHz/32.768kHz

1Hz

CONTROL

LOGIC

Dallas Semiconducto

DS1339

MUX/

BUFFER

LARM,

TRICKLE

CHARGE, AND

CONTROL

REGISTERS

CLOCK AND

CALENDAR

REGISTERS

USER BUFFER

(7 BYTES)

SQW

INT

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