Overview
The DS1307Z/TR is a low-power, serial real-time clock (RTC) manufactured by Analog Devices Inc./Maxim Integrated. This component integrates a full binary-coded decimal (BCD) clock/calendar with 56 bytes of nonvolatile (NV) SRAM. It operates via a 2-wire, bidirectional I2C bus, providing seconds, minutes, hours, day, date, month, and year information. The DS1307Z/TR also includes automatic adjustments for months with fewer than 31 days and leap year corrections, making it a reliable choice for various timekeeping applications.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Package | Surface Mount, 8-SOIC (0.154", 3.90mm Width) | 8-SOIC |
| Interface | I2C, 2-Wire Serial | I2C |
| Date Format | YY-MM-DD-dd | YY-MM-DD-dd |
| Time Format | HH:MM:SS (12/24 hr) | HH:MM:SS (12/24 hr) |
| Memory Size | 56 bytes NV SRAM | 56 bytes |
| Supply Voltage | 4.5V ~ 5.5V | 4.5V ~ 5.5V |
| Battery Supply Voltage | 2V ~ 3.5V | 2V ~ 3.5V |
| Operating Temperature | 0°C ~ 70°C | 0°C ~ 70°C |
| Current - Timekeeping (Max) | 200µA @ 5V | 200µA @ 5V |
Key Features
- Low-power consumption, less than 500nA in battery backup mode with oscillator running.
- Full binary-coded decimal (BCD) clock/calendar with automatic adjustments for months with fewer than 31 days and leap year corrections.
- 56 bytes of battery-backed, nonvolatile (NV) SRAM for data storage.
- Programmable square-wave output signal.
- Automatic power-fail detect and switch circuitry to ensure continuous timekeeping during power failures.
- Available in 8-pin SOIC package.
- Operates in either the 24-hour or 12-hour format with AM/PM indicator.
Applications
- Embedded systems requiring precise timekeeping.
- Industrial control systems.
- Medical devices.
- Automotive systems.
- Consumer electronics such as clocks, timers, and calendar devices.
Q & A
- What is the primary function of the DS1307Z/TR?
The DS1307Z/TR is a real-time clock (RTC) that provides a full binary-coded decimal (BCD) clock/calendar and 56 bytes of nonvolatile (NV) SRAM.
- What interface does the DS1307Z/TR use?
The DS1307Z/TR uses a 2-wire, bidirectional I2C bus.
- What is the operating voltage range of the DS1307Z/TR?
The operating voltage range is 4.5V to 5.5V.
- What is the battery supply voltage range for the DS1307Z/TR?
The battery supply voltage range is 2V to 3.5V.
- What is the maximum current consumption during timekeeping?
The maximum current consumption during timekeeping is 200µA at 5V.
- Does the DS1307Z/TR support leap year corrections?
- What is the memory size of the NV SRAM in the DS1307Z/TR?
The NV SRAM has a capacity of 56 bytes.
- What are the available package types for the DS1307Z/TR?
The DS1307Z/TR is available in an 8-pin SOIC package.
- Does the DS1307Z/TR have a programmable square-wave output?
- How does the DS1307Z/TR handle power failures?
The DS1307Z/TR has automatic power-fail detect and switch circuitry to ensure continuous timekeeping during power failures.
