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Description
Using the Dallas Tricklecharge Timekeeper
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The parameters and performance indicators of this product are sourced from the internet. In case of discrepancies, please refer to the manufacturer's technical specifications!！
| Parameter | Description | Value |
|---|---|---|
| VCC1 (3V) | Operating Voltage for Data I/O and Control Logic | 2.5V to 5.5V |
| VCC2 (5V) | Operating Voltage for RTC | 2.5V to 5.5V |
| I/O Current | Maximum I/O Pin Current | ±10mA |
| Clock Accuracy | Temperature Range -20°C to +85°C | ±2ppm |
| RAM Size | Number of Bytes | 31 bytes |
| Clock Output | Frequency Options | 1Hz, 32.768kHz (optional) |
| Power Consumption | Active Mode (VCC1 = 3V, VCC2 = 3V) | 300nA |
| Standby Mode (VCC1 = 0V, VCC2 = 3V) | 100nA | |
| Operating Temperature | Industrial Range | -40°C to +85°C |
| Storage Temperature | Extended Range | -65°C to +125°C |
| Package Type | Standard DIP, SOIC, TSSOP |
Power Supply Connection:
Pin Configuration:
Initialization:
Data Communication:
Reading Time and Date:
Writing Time and Date:
Reading and Writing RAM:
Clock Output:
Power Management:
Temperature Considerations:
By following these instructions, you can effectively integrate the DS1302 real-time clock into your project.
(For reference only)FEATURES
● Real time clock counts seconds, minutes hours, date of the month, month, day of the week, and year with leap year compensation valid up to 2100
● 31 x 8 RAM for scratchpad data storage
● Serial l/O for minimum pin count
● 2.0-5.5V full operation
● Uses less than 300nA at 2.0V
● Single -byte or multiple-byte (burst mode) data transfer for read or write of clock or RAM data
● 8-pin DIP or optional 8-pin SOlCs for surface mount
● Simple 3-wire interface
● TTL-compatible (VCC =5V)
● Optional industrial temperature range -40℃ to +85℃
● DS1202 compatible
● Recognized by Underwriters Laboratory
Preview of the first 3 pages of the data sheet
| QUANTITY | UNIT PRICE | PLUS UNIT PRICE | TOTAL PRICE |
|---|---|---|---|
| ≥1: | US $0.24343 | US $0.21908 | US $0.21908 |
| ≥10: | US $0.17388 | US $0.15649 | US $1.56490 |
| ≥50: | US $0.13910 | US $0.12519 | US $6.25950 |
| ≥100: | US $0.12519 | US $0.11267 | US $11.26700 |
| ≥150: | US $0.11824 | US $0.10641 | US $15.96150 |
| ≥200: | US $0.11476 | US $0.10328 | US $20.65600 |
| ≥500: | US $0.11337 | US $0.10203 | US $51.01500 |
| ≥1000: | US $0.11198 | US $0.10078 | US $100.78000 |
| ≥3000: | US $0.11128 | US $0.10015 | US $300.45000 |
Substitute (equivalent) Product
| Substitute Product Name | Brief Description |
|---|---|
| DS1307 | A low-power, full binary-coded decimal (BCD) clock/calendar with 56-byte NV RAM. |
| DS3231 | A highly accurate I2C real-time clock (RTC) with an integrated temperature-compensated crystal oscillator. |
| PCF8563 | An I2C bus real-time clock/calendar optimized for low power consumption. |
| DS1302SN | Similar to DS1302, but in a more robust package for different operational needs. |
| M41T00 | A serial real-time clock with a built-in crystal and battery back-up. |
| RV-3028-C7 | An ultra-low power I2C real-time clock with temperature compensation. |
| DS1340 | A real-time clock with I2C interface and power management features. |
| MCP7940N | A highly integrated real-time clock/calendar with EEPROM and SRAM. |
Product Usage
The DS1302 is a real-time clock (RTC) IC with a built-in trickle charger and SRAM. It is commonly used in a variety of circuits that require accurate timekeeping. Below are some example circuits that use the DS1302:
Digital Clocks: The DS1302 is frequently used in digital clock projects involving microcontrollers such as Arduino, Raspberry Pi, or ESP8266/ESP32. These clocks can display the current time, date, and sometimes additional information like temperature or humidity.
Data Loggers: In data logger circuits, the DS1302 is used to timestamp recorded data accurately. For instance, environmental monitoring systems may log temperature, humidity, and pressure data along with the exact time and date of each measurement.
Alarm Systems: The DS1302 can be used in alarm clock circuits or other alert systems where specific events need to trigger at predetermined times.
Timers: The DS1302 is suitable for use in long-duration timers that need to maintain accuracy over extended periods.
Home Automation: In smart home or home automation systems, the DS1302 can help schedule tasks, such as turning lights on/off or controlling HVAC systems based on the time of day.
Access Control: In systems like school or office attendance systems, the DS1302 can be used to timestamp when an employee or student logs in or out.
Embedded Systems: Any embedded system requiring a real-time clock that needs to run multiple tasks at set times can benefit from the DS1302.
A typical DS1302-based circuit may include:
An example schematic for interfacing the DS1302 with an Arduino might look like this:
Required Arduino DS1302
---------------------------
5V --> Vcc
GND --> GND
Pin 7 --> SDA (Data)
Pin 8 --> SCL (Clock)
Pin 9 --> RST (Reset)
Battery+ --> Vbat
Libraries such as the DS1302 Arduino Library are available and provide functions for reading and setting time and date values easily.
In conclusion, the DS1302 is versatile and widely used in many circuits where accurate timekeeping and low power operation are crucial.
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All UTSOURCE purchases have a 90 days money back return policy, plus a 100 days UTSOURCE warranty against any manufacturing defects.This warranty shall not apply to any item where defects have been caused by improper customer assembly, failure by customer to follow instructions, product modification, negligent or improper operation.
DS1302
DS1302 has several brands around the world that may have alternate names for DS1302 due to regional differences or acquisition. DS1302 may also be known as the following names:
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