DS1306
Serial Alarm Real-Time Clock
- Part Models
- 6
- 1ku List Price
- Starting From $3.43
Part Details
- Completely Manages All Timekeeping Functions
- Real-Time Clock (RTC) Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the Week, and Year with Leap-Year Compensation Valid Up to 2100
- 96-Byte, Battery-Backed NV RAM for Data Storage
- Two Time-Of-Day Alarms, Programmable on Combination of Seconds, Minutes, Hours, and Day of the Week
- 1Hz and 32.768kHz Clock Outputs
- Standard Serial Port Interfaces with Most Microcontrollers
- Supports Motorola SPI (Serial Peripheral Interface) Modes 1 and 3 or Standard 3-Wire Interface
- Burst Mode for Reading/Writing Successive Addresses in Clock/RAM
- Multiple Power Supply Pins Ease Adding Battery For Backup
- Dual-Power Supply Pins for Primary and Backup Power Supplies
- Optional Trickle Charge Output to Backup Supply
- 2.0V to 5.5V Operation
- Optional Industrial Temperature Range: -40°C to +85°C Supports Operation in a Wide Range of Applications
- 20-Pin TSSOP Minimizes Required Space
- Underwriters Laboratory (UL®) Recognized
The DS1306 serial alarm real-time clock (RTC) provides a full binary coded decimal (BCD) clock calendar that is accessed by a simple serial interface. The clock/calendar provides seconds, minutes, hours, day, date, month, and year information. The end of the month date 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. In addition, 96 bytes of NV RAM are provided for data storage.
An interface logic-power supply input pin (VCCIF) allows the DS1306 to drive SDO and 32kHz pins to a level that is compatible with the interface logic. This allows an easy interface to 3V logic in mixed supply systems. The DS1306 offers dual-power supplies as well as a battery-input pin. The dual-power supplies support a programmable trickle charge circuit that allows a rechargeable energy source (such as a super cap or rechargeable battery) to be used for a backup supply. The VBAT pin allows the device to be backed up by a non-rechargeable battery. The DS1306 is fully operational from 2.0V to 5.5V.
Two programmable time-of-day alarms are provided by the DS1306. Each alarm can generate an interrupt on a programmable combination of seconds, minutes, hours, and day. "Don't care" states can be inserted into one or more fields if it is desired for them to be ignored for the alarm condition. A 1Hz and a 32kHz clock output are also available.
The DS1306 supports a direct interface to SPI™ serial data ports or standard 3-wire interface. An easy-to use address and data format is implemented in which data transfers can occur 1-byte at a time or in multiple-byte Burst Mode®.
Documentation
Data Sheet 1
Reliability Data 1
Design Note 9
Technical Articles 5
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| DS1306+ | Plastic Dual-In-Line, Narrow (0.3in) | ||
| DS1306E+ | Thin Shrink Small-Outline Package | ||
| DS1306E+T&R | Thin Shrink Small-Outline Package | ||
| DS1306EN+ | Thin Shrink Small-Outline Package | ||
| DS1306EN+T&R | Thin Shrink Small-Outline Package | ||
| DS1306N+ | Plastic Dual-In-Line, Narrow (0.3in) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Dec 11, 2018 - 1754N ASSEMBLY |
||
| DS1306E+ | PRODUCTION | |
| DS1306E+T&R | PRODUCTION | |
|
Dec 8, 2016 - 1613_ERRATA ASSEMBLY |
||
| DS1306E+ | PRODUCTION | |
| DS1306E+T&R | PRODUCTION | |
| DS1306EN+ | PRODUCTION | |
| DS1306EN+T&R | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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| Parts | Product Life Cycle | Description |
|---|---|---|
| Product 2 | ||
| MAX6901 | 3-Wire Serial RTC in a TDFN | |
| MAX6902 | SPI-Compatible RTC in a TDFN | |
| Serial Address RTCs 6 | ||
| DS1302 | Trickle-Charge Timekeeping Chip | |
| DS1305 | Serial Alarm Real-Time Clock | |
| DS1390 | PRODUCTION | Low-Voltage SPI/3-Wire RTCs with Trickle Charger |
| DS1391 | PRODUCTION | Low-Voltage SPI/3-Wire RTCs with Trickle Charger |
| DS1392 | PRODUCTION | Low-Voltage SPI/3-Wire RTCs with Trickle Charger |
| DS1393 | PRODUCTION | Low-Voltage SPI/3-Wire RTCs with Trickle Charger |
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