DS1305

Serial Alarm Real-Time Clock

3-Wire/SPI Serial Interface Trickle Charge Real-Time Clock with Alarms

Part Models
6
1ku List Price
Starting From $3.74
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Part Details

  • Completely Manages All Timekeeping Functions
    • Real-Time Clock (RTC) Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the Week, and Year with Leap-Year Compensation Valid Up to 2100
    • 96-Byte, Battery-Backed NV RAM for Data Storage
    • Two Time-Of-Day Alarms, Programmable on Combination of Seconds, Minutes, Hours, and Day of the Week
  • Standard Serial Port Interfaces with Most Microcontrollers
    • Supports SPI (Serial Peripheral Interface) Modes 1 and 3 or Standard 3-Wire Interface
    • Burst Mode for Reading/Writing Successive Addresses in Clock/RAM
  • Multiple Power Supply Pins Ease Adding Battery For Backup
    • Dual-Power Supply Pins for Primary and Backup Power Supplies
    • Optional Trickle Charge Output to Backup Supply
    • 2.0V to 5.5V Operation
  • 20-Pin TSSOP Minimizes Required Space
  • Optional Industrial Temperature Range: -40°C to +85°C Supports Operation in a Wide Range of Applications
  • Underwriters Laboratory (UL®) Recognized
DS1305
Serial Alarm Real-Time Clock
DS1305: Typical Operating Circuit
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Hardware Ecosystem

Parts Product Life Cycle Description
Product 2
MAX6901 3-Wire Serial RTC in a TDFN
MAX6902 SPI-Compatible RTC in a TDFN
Serial Address RTCs 6
DS1302 Trickle-Charge Timekeeping Chip
DS1306 Serial Alarm Real-Time Clock
DS1390 PRODUCTION Low-Voltage SPI/3-Wire RTCs with Trickle Charger
DS1391 PRODUCTION Low-Voltage SPI/3-Wire RTCs with Trickle Charger
DS1392 PRODUCTION Low-Voltage SPI/3-Wire RTCs with Trickle Charger
DS1393 PRODUCTION Low-Voltage SPI/3-Wire RTCs with Trickle Charger
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