Product Details
Key Features
Applications/Uses
Interface | I2C |
VSUPPLY (V) | 1.8 5.5 |
Date/ Time Format (hh = sec/100) | YY-MM-DD/ HH:MM:SS |
Time Keeping Current (nA) (typ) | 220 |
CL (pF) | 6 |
Memory Type | None |
Time of Day Alarms | 2 |
Package/Pins | TDFN/8 UMAX/8 |
Budgetary Price (See Notes) | $1.18 @1k |
Simplified Block Diagram
Technical Docs
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
Parameters
Interface | I2C |
VSUPPLY (V) | 1.8 5.5 |
Date/ Time Format (hh = sec/100) | YY-MM-DD/ HH:MM:SS |
Time Keeping Current (nA) (typ) | 220 |
CL (pF) | 6 |
Memory Type | None |
Time of Day Alarms | 2 |
Package/Pins | TDFN/8 UMAX/8 |
Budgetary Price (See Notes) | $1.18 @1k |
Key Features
- Low Timekeeping Current of 250nA (typ)
- Compatible with Crystal ESR Up to 100kΩ
- Use Crystals with CL = 6pF (DS1341) or CL= 12.5pF (DS1342)
- +1.8V to +5.5V Operating Voltage Range
- Maintain Time Down to +1.15V (typ)
- Fast (400kHz) I²C Interface
- Bus Timeout for Lockup-Free Operation
- RTC Counts Seconds, Minutes, Hours, Day, Date, Month, and Year with Leap Year Compensation Valid Through 2099
- External Clock Source for Synchronization Clock Reference (e.g., 32kHz, 50Hz/60Hz Power Line, GPS 1PPS)
- Two Time-of-Day Alarm with Two Interrupt Outputs
- Programmable Square-Wave Output
- Industrial Temperature Range (-40°C to +85°C)
- Small, 8-Pin µSOP or TDFN Packages
Applications/Uses
- Medical
- Point of Sale (POS)
- Portable Audio
- Portable Instruments
- Telematics
Description
The clock/calendar 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 24hr or 12hr format with an AM/PM indicator.
The DS1341/DS1342 also include an input for synchronization. When a reference clock (e.g., 60Hz power line or GPS 1PPS) is present at the CLKIN pin and the enable external clock input bit (ECLK) is set to 1, the DS1341/DS1342 RTCs are frequency-locked to the external clock and the clock accuracy is determined by the external source. In case of external clock failure, the clock is switched to the crystal oscillator.
The devices are available in lead(Pb)-free/RoHS-compliant, 8-pin µSOP or TDFN packages. The devices support a -40°C to +85°C extended temperature range.
Technical Docs
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .