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DS1339 Datasheet(PDF) 1 Page - Dallas Semiconductor |
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DS1339 Datasheet(HTML) 1 Page - Dallas Semiconductor |
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1 / 18 page  1 of 18 REV: 071205 GENERAL 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. Address and data are transferred serially through an I 2C* 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 power- sense 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 ) FEATURES § Real-Time Clock (RTC) Counts Seconds, Minutes, Hours, Day, Date, Month, and Year with Leap- Year Compensation Valid Up to 2100 § Available in a Surface-Mount Package with an Integrated Crystal (DS1339C) § I 2C 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. *I 2C is a trademark of Philips Corp. Purchase of I2C components from Maxim Integrated Products, Inc., or one of its sublicensed Associated Companies, conveys a license under the Philips I 2C Patent Rights to use these components in an I 2C system, provided that the system conforms to the I 2C Standard Specification as defined by Philips. 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 8 mSOP 1339 ##-2 DS1339U-3 -40°C to +85°C 3.0 8 mSOP 1339 ##-3 DS1339U-3+ -40°C to +85°C 3.0 8 mSOP 1339 ##-3 DS1339U-33 -40°C to +85°C 3.3 8 mSOP 1339 ##-33 DS1339U-33+ -40°C to +85°C 3.3 8 mSOP 1339 ##-33 + Denotes a lead-free/RoHS-compliant device. ## = second line, revision code 2 = 2.0V (VCC ±10%) 3 = 3.0V (VCC ±10%) 33 = 3.3V (VCC ±10%) * A “+” on the top mark indicates a lead-free device. DS1339 I2C Serial Real-Time Clock www.maxim-ic.com |
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