Product Details
Key Features
Applications/Uses
Frequency | 32.768kHz |
Osc. Type | TCXO |
Tuning Adjustment Type | Digital |
Frequency Output Type | CMOS Push-Pull |
Frequency Stability (±ppm/yr) (0 to +40°C) | 2 |
Frequency Stability (±ppm/yr) (-40 to 0°C/ +40 to +85°C) | 3.5 |
Frequency Stability (±ppm/yr) (vs. VCC) | 1 (typ) |
Frequency Stability (±ppm) (vs. Aging) | 5 (0-10 Years) |
VSUPPLY (V) | 2.3 to 5.5 |
Package/Pins | SOIC (W)/20 |
Budgetary Price (See Notes) | 4.85 |
Interface | I2C |
VSUPPLY (V) | 2.3 to 5.5 |
Date/ Time Format (hh = sec/100) | YY-MM-DD/ HH:MM:SS |
Time Keeping Current (nA) (typ) | 1500 |
Memory Type | NV SRAM |
Memory Size (Bytes) | 236 |
Time of Day Alarms | 2 |
Integrated Resonator | XTAL |
Package/Pins | SOIC (W)/20 |
Simplified Block Diagram
Technical Docs
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Parameters
Frequency | 32.768kHz |
Osc. Type | TCXO |
Tuning Adjustment Type | Digital |
Frequency Output Type | CMOS Push-Pull |
Frequency Stability (±ppm/yr) (0 to +40°C) | 2 |
Frequency Stability (±ppm/yr) (-40 to 0°C/ +40 to +85°C) | 3.5 |
Frequency Stability (±ppm/yr) (vs. VCC) | 1 (typ) |
Frequency Stability (±ppm) (vs. Aging) | 5 (0-10 Years) |
VSUPPLY (V) | 2.3 to 5.5 |
Package/Pins | SOIC (W)/20 |
Budgetary Price (See Notes) | 4.85 |
Interface | I2C |
VSUPPLY (V) | 2.3 to 5.5 |
Date/ Time Format (hh = sec/100) | YY-MM-DD/ HH:MM:SS |
Time Keeping Current (nA) (typ) | 1500 |
Memory Type | NV SRAM |
Memory Size (Bytes) | 236 |
Time of Day Alarms | 2 |
Integrated Resonator | XTAL |
Package/Pins | SOIC (W)/20 |
Key Features
- Accuracy ±2ppm from 0°C to +40°C
- Accuracy ±3.5ppm from -40°C to +85°C
- Battery Backup Input for Continuous Timekeeping
- Operating Temperature Ranges
- Commercial: 0°C to +70°C
- Industrial: -40°C to +85°C
- 236 Bytes of Battery-Backed SRAM
- Low-Power Consumption
- Real-Time Clock Counts Seconds, Minutes, Hours, Day, Date, Month, and Year with Leap Year Compensation Valid Up to 2099
- Two Time-of-Day Alarms
- Programmable Square-Wave Output
- Fast (400kHz) I²C Interface
- 3.3V Operation
- Digital Temp Sensor Output: ±3°C Accuracy
- Register for Aging Trim
- Active-Low RST Input/Output
- 300-Mil, 20-Pin SO Package
Applications/Uses
- GPS
- Servers
- Telematics
- Utility Power Meters
Description
The RTC maintains 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 an active-low AM/PM indicator. Two programmable time-of-day alarms and a programmable square-wave output are provided. Address and data are transferred serially through an I²C bidirectional bus.
A precision temperature-compensated voltage reference and comparator circuit monitors the status of VCC to detect power failures, to provide a reset output, and to automatically switch to the backup supply when necessary. Additionally, the active-low RST pin is monitored as a pushbutton input for generating a µP reset.
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 .