DS1302+

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DS1302+

IC RTC CLK/CALENDAR SER 8DIP

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規格

Part Status Active
Base Product Number DS1302
DigiKey Programmable Not Verified
Type Clock/Calendar
Features Leap Year, NVSRAM, Trickle-Charger
Memory Size 31B
Time Format HH:MM:SS (12/24 hr)
Date Format YY-MM-DD-dd
Interface 3-Wire Serial
Voltage - Supply 2V ~ 5.5V
Voltage - Supply, Battery 2V ~ 5.5V
Current - Timekeeping (Max) 0.3µA ~ 1µA @ 2V ~ 5V
Operating Temperature 0°C ~ 70°C
Mounting Type Through Hole
Package 8-DIP (0.300", 7.62mm)
Supplier Device Package 8-PDIP
Packaging Tube

概述

Description

The DS1302 is a low-power, real-time clock (RTC) integrated circuit (IC) designed for battery-backed applications. It keeps track of time (hours, minutes, seconds) and date (year, month, day) with a precision of ±2 minutes per month at room temperature. The DS1302 communicates with microcontrollers via a simple three-wire Serial Peripheral Interface (SPI), including a data line, clock line, and chip select line.
Key features include a built-in oscillator, a programmable square wave output, and a battery backup for maintaining time during power interruptions. The DS1302 operates on a supply voltage of 2.0V to 5.5V, making it suitable for various low-power applications. Its memory can store up to 31 bytes of general-purpose RAM, useful for additional data storage related to timekeeping.
Applications range from clocks and timers to embedded systems requiring accurate timekeeping. The DS1302 is widely used in consumer electronics, industrial control, and IoT devices due to its reliability and ease of integration.

Features

The DS1302 is a real-time clock (RTC) integrated circuit that provides accurate timekeeping and date information. Its key features include:
1. Timekeeping: Maintains time in hours, minutes, seconds, and date (day, month, year), including leap years.
2. Power Supply: Operates with a supply voltage of 2.0V to 5.5V and can be powered by a backup battery.
3. Low Power Consumption: Designed for minimal power usage, making it suitable for battery-operated devices.
4. Serial Interface: Communicates with microcontrollers via a simple SPI-compatible interface for easy integration.
5. Programmable Square Wave Output: Can generate square wave signals for timing applications.
6. Read/Write Capability: Allows both reading of time and writing of new values directly to the RTC registers.
7. Built-in Oscillator: Includes an internal oscillator that can be calibrated for accuracy.
8. Chip Enable Function: Supports power-saving modes by disabling the chip when not in use.
The DS1302 is widely used in applications requiring accurate timekeeping, such as clocks, timers, and data loggers.

Package

The DS1302+ is typically packaged in an 8-pin dual in-line package (DIP) or a surface mount package (SOIC). These package types facilitate easy integration into various electronic circuits for real-time clock applications.

Pinout

The DS1302+ is a real-time clock (RTC) integrated circuit that operates with a pin count of 8. The pin functions are as follows:
1. VCC - Power supply pin (2.0V to 5.5V).
2. GND - Ground pin.
3. SCLK - Serial clock input used to synchronize data transfer.
4. IO - Bidirectional data input/output pin for communication.
5. CE - Chip enable pin that activates the device for communication.
6. RESET - Resets the device and initializes the registers.
7. T1 - Optional output pin for a square wave (1Hz or other configurable frequencies).
8. T2 - Optional output pin for another square wave or alarm output.
The DS1302+ features a low-power design, making it suitable for battery-operated devices, and includes a 31-byte RAM for storing user data. It communicates using a simple serial interface, making it easy to integrate into various applications.

Manufacturer

The DS1302+ is manufactured by Maxim Integrated, a company that specializes in designing and manufacturing analog and mixed-signal semiconductor products. Founded in 1983, Maxim Integrated focuses on developing innovative solutions for various applications, including communications, automotive, industrial, and consumer electronics. In 2020, Maxim Integrated was acquired by Analog Devices, Inc. (ADI), further expanding its portfolio and technological capabilities. The DS1302+ is a real-time clock (RTC) chip known for its low power consumption and ability to keep track of time even during power outages.

Application

The DS1302 is a real-time clock (RTC) chip used in various applications, including:
1. Embedded Systems: For timekeeping in microcontroller projects.
2. Data Logging: Time-stamping data in environmental sensors and IoT devices.
3. Alarm Systems: Triggering events or alarms based on time.
4. Scheduling Devices: Managing tasks in automation systems.
5. Consumer Electronics: Time management in clocks, watches, and appliances.
6. Networked Devices: Synchronizing time in network applications.
Its low power consumption and ease of interfacing make it ideal for battery-powered devices.

Equivalent

Equivalent products to the DS1302+ chip include the DS1307, DS1302, and DS3231. These chips offer similar real-time clock functionalities, with variations in features such as power consumption, timekeeping accuracy, and interface protocols. The DS3231, for example, includes a temperature-compensated crystal oscillator for improved precision. Always check specific requirements and datasheets for compatibility.

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