DS1302S

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DS1302S

IC RTC CLK/CALENDAR SER 8-SOIC

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Thông số kỹ thuật

Supplier Analog Devices Inc./Maxim Integrated
Package Tube
ProductStatus Active
Type Clock/Calendar
Features Leap Year, NVSRAM, Trickle-Charger
MemorySize 31B
TimeFormat HH:MM:SS (12/24 hr)
DateFormat YY-MM-DD-dd
Interface 3-Wire Serial
Voltage-Supply 2V ~ 5.5V
Voltage-SupplyBattery 2V ~ 5.5V
Current-Timekeeping(Max) 0.3µA ~ 1µA @ 2V ~ 5V
OperatingTemperature 0°C ~ 70°C
MountingType Surface Mount
Package/Case 8-SOIC (0.209, 5.30mm Width)

Tổng quan

Description

The DS1302S is a real-time clock (RTC) integrated circuit designed for timekeeping applications. It utilizes a low-power CMOS technology, making it suitable for battery-operated devices. The chip provides accurate timekeeping with a resolution of seconds, minutes, hours, day, month, and year, including leap year adjustments.
The DS1302S communicates with microcontrollers via a simple three-wire serial interface, consisting of a data line, a clock line, and a chip select line. It includes a built-in battery backup feature, allowing it to maintain time even when external power is lost.
Key features include:
- Timekeeping accuracy of ±2 minutes per month.
- A programmable square wave output.
- A low power consumption mode.
- Ability to store 31 bytes of user RAM.
The DS1302S is widely used in applications like digital clocks, data loggers, and embedded systems requiring precise time management. Its ease of integration and reliability make it a popular choice among hobbyists and engineers alike.

Features

The DS1302S is a low-power real-time clock (RTC) integrated circuit designed for battery-backed applications. Key features include:
1. Timekeeping: Maintains accurate time (seconds, minutes, hours, day, month, and year) with leap-year compensation.
2. Interface: Communicates via a simple three-wire serial interface (CLK, I/O, and CE) for easy integration.
3. Battery Backup: Supports a backup battery to retain time during power outages.
4. Low Power Consumption: Operates on a low supply current, making it suitable for portable devices.
5. Programmable Square Wave Output: Generates a square wave output for timing applications.
6. RAM Functionality: Includes 31 bytes of SRAM for user data storage.
7. Time Format: Supports both 12-hour and 24-hour formats.
8. Temperature Compensated: Provides reliable performance across a wide temperature range.
Overall, the DS1302S is ideal for applications requiring precise timekeeping and minimal power usage.

Package

The DS1302S is typically available in a 16-pin DIP (Dual In-line Package) format or a 16-pin SOIC (Small Outline Integrated Circuit) package. These package types are designed for easy integration into various electronic circuits, providing flexibility for different applications.

Pinout

The DS1302S is a real-time clock (RTC) integrated circuit with a total of 8 pins. Here’s a brief overview of each pin and its function:
1. VCC: Power supply pin (2.0V to 5.5V).
2. GND: Ground connection.
3. X1: Connects to a 32.768 kHz crystal oscillator.
4. X2: Connects to the other terminal of the crystal oscillator (X1).
5. SCLK: Serial clock input for data communication.
6. IO: Bidirectional data input/output for communication.
7. CE: Chip enable pin, activates the device for communication.
8. RST: Reset pin to initialize the device.
The DS1302S is commonly used in applications requiring timekeeping functions, such as clocks, timers, and scheduling devices. It provides a simple interface for setting and retrieving time and date information.

Manufacturer

The DS1302S is manufactured by Dallas Semiconductor, which is a division of Maxim Integrated Products, Inc. Dallas Semiconductor specializes in designing and manufacturing a variety of semiconductor products, including real-time clocks, memory chips, and data acquisition devices. The company is known for its innovative integrated circuits (ICs) that cater to diverse applications in consumer electronics, industrial equipment, and automotive systems. Maxim Integrated, now part of Analog Devices, focuses on analog and mixed-signal ICs, providing solutions for power management, signal processing, and interface applications.

Application

The DS1302S is commonly used in various applications including real-time clock management in embedded systems, timekeeping in digital devices, data logging, alarm systems, and scheduling applications. It is also employed in consumer electronics, automotive systems, and industrial automation for accurate time tracking and event timing functions.

Equivalent

Equivalent products to the DS1302S chip include the DS1307, MCP7940N, and PCF8563. These chips serve similar functions as real-time clocks (RTCs) and offer features like I2C or SPI interfaces for timekeeping applications.

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