DS1302 DS1307 DS3231 RTC Module
Price range: $1.39 through $4.90
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Product Introduction
Real Time Clock DS1302
The DS1302 RTC module is a low-current charging clock chip that incorporates a real-time clock/calendar and 31-byte static RAM. It communicates with the microcontroller via a simple serial interface. The real-time clock/calendar circuit provides information on seconds, minutes, hours, day, week, month, and year. The number of days in each month and the number of days in leap years can be automatically adjusted. The clock operation can be determined by the AM/PM indication to adopt either 24-hour or 12-hour format. The DS1302 real time clock can communicate with the microcontroller simply in a synchronous serial manner, using only three pins: RST reset, I/O data line, and SCLK serial clock. The read/write data of the clock/RAM is transmitted in a byte or up to 31-byte character group format. When the DS1302 module is operating, its power consumption is very low, with the power consumption when storing data and time information being less than 1mw.
Real Time Clock DS1302 Parameter
- The backup battery is CR2032, with a voltage of 3V and a current of 260mAh. It is a non-rechargeable battery. The theoretical data indicates a retention time of more than 10 years!
- The crystal oscillator is 32.768KHz, with a matching capacitor of 6pF, and the size is 2*6mm.
- DS1302 is an 8-pin surface-mount chip. There is an IC socket below the chip, which is convenient for replacing and removing the chip.
- The module’s operating voltage is compatible with 3.3V/5V, and it can be connected to 5V and 3.3V microcontrollers.
- Operating temperature: 0℃~70℃
Real Time Clock DS1302 CR1220 Battery Holder
The DS1302 real time clock has the ability to calculate seconds, minutes, hours, days, weeks, months, and years up to 2100, as well as the ability to adjust for leap years. It has a 318-bit buffer data storage RAM. The serial I/O port mode minimizes the number of pins. It operates within a wide voltage range of 2.0/5.5V. The operating current is less than 300nA at 2.0V. There are two transmission methods when reading/writing clock or RAM data: single-byte transmission and multi-byte transmission in character group mode. The 8-pin DIP package or the optional 8-pin SOIC package is based on surface mount assembly. It has a simple 3-wire interface. An optional industrial-grade temperature range of -40℃ to +85℃ is available. Dual power supply tubes are used for the main power supply and backup power supply.
Real Time Clock DS1302 CR1220 Battery Holder Parameter
- The PCB is a double-sided board with a full surface-mount design. It is elegant and imposing, with dimensions of 47mm x 18mm.
- It has positioning holes with a diameter of 3mm, facilitating fixation.
- The spare battery is a CR1220 battery with a voltage of 3V and is not rechargeable.
- The crystal oscillator is 32.768KHz.
- DS1302 is a So-8 package surface-mount component.
- The module operates within a voltage range of 3.3V/5V and can be connected to 5V or 3.3V microcontrollers.
- Operating temperature: 0℃~70℃
- It comes with a power indicator light.
DS1307 Real Time Clock Module 24C32 RAM
The DS1307 RTC Module (24C32 32K I2C EEPROM RAM) uses a rechargeable LIR2032 lithium battery and comes with a charging circuit to address the issue of the DS1307 not being readable or writable when equipped with a backup battery. Once fully charged, it can power the DS1307 RTC module for one year. The clock pin of the DS1307 is brought out to provide a clock signal for the microcontroller. It can be cascaded with other I2C devices.
The RTC DS1307 module is a low-power, full BCD code clock calendar real-time clock chip with 56 bytes of non-volatile RAM. Address and data are transmitted through a two-wire bidirectional serial bus. The chip can provide information such as seconds, minutes, and hours, and automatically adjusts the number of days in each month. It also has a leap year compensation function. The AM/PM flag bit determines whether the clock operates in 24-hour or 12-hour mode. The chip has an internal power supply detection circuit with power failure detection and battery switching functions.
DS1307 Real Time Clock Module 24C32 RAM Parameter
- DS1307 I2C Real Time Clock Chip
- 24C32 32K I2C EEPROM RAM
- Connect the clock pins of DS1307 to provide clock signals for the microcontroller.
- It can be cascaded with other I2C devices.
DS3231 Real Time Clock Module High-precision Clock Module
The Raspberry Pi highest-precision clock module, the DS3231 RTC module, can also be used on the motherboard. The module itself can adapt to systems with 3.3V and 5V voltages, without the need for level conversion, which is extremely convenient!
DS3231 Real Time Clock Module High-precision Clock Module Parameter
- Within the temperature range of -40℃ to +85℃, the timing accuracy remains at ±5ppm (±0.432 seconds per day).
- Provides battery backup for continuous timing.
- Low power consumption.
- The device packaging and functions are compatible with DS3231.
- Complete clock calendar functions include seconds, minutes, hours, day of the week, date, month, and year timing, and provides leap year compensation valid up to the year 2100.
- Two calendar alarms.
- 1Hz and 32.768kHz output.
- Reset output and button anti-jitter input.
- High-speed (400kHz) I2C serial bus.
10. +2.3V to +5.5V power supply voltage.
11. Digital temperature sensor with an accuracy of ±3℃.
12. Operating temperature range of -40℃ to +85℃.
13. 16-pin SO (300mil) package.
DS3231 Real Time Clock Module AT24C32
The RTC DS3231 module is a low-cost, high-precision I2C real-time clock that features an integrated temperature-compensated crystal oscillator (TCXO) and crystal. This device includes a battery input terminal, allowing it to maintain timing even when the main power is disconnected. The integrated crystal oscillator enhances the long-term DS3231 precision and reduces the number of components on the production line. The DS3231 RTC module offers both commercial and industrial temperature ranges and is packaged in a 16-pin 300mil SO package.
The RTC stores information on seconds, minutes, hours, day of the week, date, month, and year. For months with fewer than 31 days, the end-of-month date is automatically adjusted, including corrections for leap years. The clock’s operation format can be either 24-hour or 12-hour format with AM/PM indication. Two configurable calendar alarms and a configurable square wave output are provided.
The DS3231 internally integrates a very accurate digital temperature sensor that can be accessed via the IIC interface (just like time). The on-chip control circuit can perform automatic power detection and manage the power switching between the main power and the backup power source (low-voltage battery).
DS3231 Real Time Clock Module AT24C32 Parameter
- Operating Voltage: 3.3~5.5V
- Clock Chip: High-precision clock chip DS3231
- Clock Accuracy: Within the temperature range of 0℃~40℃, the accuracy is 2ppm, and the annual error is approximately 1 minute
- Comes with 2 calendar alarms
- Programmable square wave output
- Real-time clock generates time measurement for seconds, minutes, hours, day of the week, date, month and year, and provides leap year compensation valid up to the year 2100.
- The chip is equipped with an internal temperature sensor with an accuracy of ±3℃.
- Storage Chip: AT24C32 (storage capacity 32K)
- IIC bus interface, transmission speed 400KHz (when the operating voltage is 5V), can be cascaded with other IIC devices, the 24C32 address can be modified by short-circuiting A0/A1/A2, the default address is 0x57.
- Comes with battery CR2032, ensuring that the clock continues to operate normally even after the system is powered off.
DS3231SN Real Time Clock Module
Using the DS3231SN high-precision clock chip, which has an internal 32.768 crystal oscillator, it can provide precise data for year, month, day, hour, minute, second, morning and afternoon. It can also output a 1Hz signal, generating one signal per second. It can be kept running by using CR1220 button batteries.
The pull-up resistors on the I2C bus need to be soldered by yourself, R1 and R2. The pin spacing of this module is 22.86mm.
Note: No battery included!!
Application
- Time synchronization in embedded systems: In embedded systems, the real time clock module can serve as the system clock source, providing accurate time information. Through the I2C interface, the microcontroller can read the current time of the real-time clock module and synchronize the time when necessary.
- Timestamp of data recorder: In data recorder applications, the real-time clock module can provide an accurate timestamp for each recorded data item. This is very important for subsequent data analysis and processing.
- Time synchronization in industrial control systems: In industrial control systems, multiple devices need to maintain time synchronization. The real-time clock module can serve as the common clock source for these devices, ensuring the accuracy of time synchronization between them.
- Temperature monitoring: The temperature sensor built into the real time clock module can be used to monitor the environmental temperature. By connecting the real time clock module to the microcontroller, real-time temperature data can be read and processed or displayed.
Relative Information
The DS1302, DS1307, and DS3231 are a classic trio of RTC modules! The DS1302 is known for its cost-effectiveness, ideal for basic timing. The DS1307 is a classic I2C benchmark, widely used. The DS3231 is the precision king with a temperature-compensated crystal oscillator (TCXO), ensuring accurate timekeeping regardless of environment. From fun experiments to precision instruments, there’s one for every timekeeping need!
Shipping Cost
We only ship to the United States. Shipping costs are calculated based on the total order amount.
Shipping Method And Delivery Time
All orders will be processed and shipped within 72 hours of placing the order (excluding weekends and holidays). They will ship from Shenzhen, China, primarily via 4PX logistics. Depending on the destination and logistics conditions, other carriers such as DHL, FedEx, UPS, USPS, etc., may also handle the delivery. Estimated shipping time is 7-12 business days, with actual delivery occurring in 10-17 business days, depending on logistics conditions.
Payment:
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