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DS1302 Specifications

Detailed technical information and Application Scenarios

Product Details

PartNumberManufactorQuantityAvailability
DS1302DALLAS144Yes

DS1302** is a **real-time clock (RTC)** integrated circuit manufactured by **Dallas Semiconductor** (now part of **Maxim Integrated**).

The DS1302 is a real-time clock (RTC) integrated circuit manufactured by Dallas Semiconductor (now part of Maxim Integrated). Below are its key specifications, descriptions, and features:

Specifications:

  • Supply Voltage: 2.0V to 5.5V
  • Operating Current: <300nA (with backup battery)
  • Clock Accuracy: ±2ppm (at 25°C)
  • Interface: Serial (3-wire SPI-compatible)
  • Clock/Calendar:
  • Seconds, minutes, hours (12/24-hour format)
  • Day, date, month, year (up to 2100)
  • RAM: 31 bytes (general-purpose)
  • Trickle-Charge Capability: Supports battery backup charging
  • Operating Temperature Range: -40°C to +85°C

Descriptions:

  • The DS1302 is a low-power RTC with a serial interface, designed for timekeeping applications.
  • It includes 31 bytes of static RAM for data storage.
  • The device can operate in battery backup mode, maintaining timekeeping when the main power is off.
  • It supports trickle charging for a backup battery (NiCd or supercapacitor).

Features:

  • Low power consumption (ideal for battery-backed applications).
  • Simple 3-wire interface (reduces microcontroller pin usage).
  • Automatic leap-year compensation (valid up to 2100).
  • Programmable trickle charger for backup power.
  • Industrial temperature range (-40°C to +85°C).
  • Small footprint (available in 8-pin DIP, SOIC, or TSSOP packages).

The DS1302 is commonly used in embedded systems, data loggers, and consumer electronics requiring accurate timekeeping.

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