Details

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BUY DS1307Z+T&R https://www.utsource.net/itm/p/5438337.html
IC RTC CLK/CALENDAR I2C 8-SOIC

Parameter	Description
Part Number	DS1307Z+T&R
Function	Real-time clock (RTC) with integrated trickle charger for backup battery
Operating Voltage	VCC: 2.3V to 5.5V
Current Consumption	300nA (典型值 at 3.3V, 25°C)
Temperature Range	-40°C to +85°C
Communication Interface	I2C interface
Oscillator Frequency	32.768kHz
Package Type	SOIC-8
Backup Battery	Supports lithium coin cell or capacitor
Trickle Charger	For charging external NiCd/NiMH battery
Square Wave Output	1Hz, 1.024kHz, 4.096kHz, 8.192kHz (可选)
Power-On Reset	Yes

Instructions for Use

1. Power Supply Connection

   • Connect the VCC pin to the supply voltage between 2.3V and 5.5V.
   • GND should be connected to the system ground.

2. I2C Communication Setup

   • The DS1307 uses I2C communication. Ensure that the SDA and SCL lines are pulled up with appropriate resistors (typically 4.7kΩ).
   • Address the device using its I2C address (0xD0).

3. Setting Time and Date

   • Write the current time and date to the appropriate registers via I2C commands.

4. Reading Time and Date

   • Read the current time and date from the device registers over I2C.

5. Backup Battery Management

   • Connect a backup power source (e.g., a lithium coin cell) to the VBAT pin to maintain timekeeping when main power is lost.
   • If using a rechargeable battery, configure the trickle charger settings through the control register.

6. Square Wave Output Configuration

   • Configure the square wave output frequency as needed by setting bits in the control register.

7. Trickle Charger Configuration

   • Set the RS1 and RS2 bits in the control register to configure the trickle charger resistance for charging the backup battery.

8. Handling Power-On Reset

   • The device includes a power-on reset function which can be utilized to reset microcontrollers or other components upon power-up.

For detailed programming examples and more advanced configurations, refer to the datasheet provided by the manufacturer.

(For reference only)