Professional IC Distribution & Technical Solutions

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.