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Product Detailed Parameters
- Description：IC RTC CLK/CALENDAR I2C 16SOIC
- Series：-
- Package：Tape & Reel (TR)
- Mfr：Analog Devices Inc./Maxim Integrated
- Type：Clock/Calendar
- Features：Alarm, Leap Year, Square Wave Output
- Memory Size：-
- Time Format：HH:MM:SS (12/24 hr)
- Date Format：YY-MM-DD-dd
- Interface：I2C, 2-Wire Serial
- Voltage - Supply：1.8V ~ 5.5V
- Voltage - Supply, Battery：-
- Current - Timekeeping (Max)：0.6µA @ 1.3V ~ 1.8V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Grade：-
- Qualification：-
- Package / Case：16-SOIC (0.295", 7.50mm Width)
- Supplier Device Package：16-SOIC
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Overview
The DS1337C/T&R is a low-power I2C serial real-time clock/calendar manufactured by Analog Devices Inc./Maxim Integrated. It counts seconds, minutes, hours, day, date, month, and year with leap-year compensation valid up to the year 2100. The device features an integrated crystal oscillator and operates within a supply voltage range of 1.8V to 5.5V. It includes two programmable time-of-day alarms, an oscillator stop flag, and a programmable square-wave output that defaults to 32kHz on power-up. The component is housed in a 16-pin SOIC package.
Feature Summary
- Integrated Crystal Oscillator: Includes an internal crystal for simplified PCB layout.
- I2C Serial Interface: Communicates via standard two-wire bus protocol.
- Low Power Consumption: Time-keeping current is 425nA to 600nA with oscillator enabled at 1.3V–1.8V.
- Leap-Year Compensation: Automatically adjusts for leap years through 2100.
Applications
- Data logging systems requiring precise timestamping.
- Portable electronic devices utilizing battery backup.
- Industrial equipment needing calendar and time-of-day tracking.
Procurement Notes
Verify the specific suffix 'T&R' indicates tape-and-reel packaging configuration. Confirm RoHS compliance status as legacy documentation may vary. Ensure the selected variant matches the required operating temperature range of -40°C to +85°C for the target application environment.
Selection Notes
Select this component when an integrated crystal solution is preferred over external crystals to save board space. The DS1337C is suitable for applications requiring dual alarms and a square-wave output. Compare against the DS1337S if an 8-pin package is sufficient for the design constraints.
Part Context
The DS1337C belongs to the Maxim Integrated DS1337 family of serial real-time clocks. It shares functional similarities with the DS1337S but differs primarily in package type (SOIC-16 vs. SOIC-8) and pin count. The family is designed for low-power timekeeping in portable and industrial electronics.
Replacement Considerations
DS1337S+T&R
FAQ
Does the DS1337C require an external crystal?
No, the DS1337C includes an integrated crystal oscillator, eliminating the need for an external crystal component.
What is the default square-wave output frequency?
The programmable square-wave output defaults to 32kHz upon power-up.
How does the device handle leap years?
The DS1337C provides automatic leap-year compensation valid up to the year 2100.
