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MAXIM INTEGRATED / ANALOG DEVICES DS1308U18 Real-Time Clock Module

The DS1308U-18+ is a low-power I2C real-time clock (RTC) with 56 bytes of non-volatile RAM housed in an 8-pin µSOP package. It features a full binary coded decimal (BCD) clock and calendar, capable of tracking seconds, minutes, hours (in 12 or 24-hour formats with AM/PM indicator), day, date, month, and year. The device automatically adjusts the end-of-month date for months with fewer than 31 days, including leap years. It includes a power-fail detection circuit that switches to backup power to maintain accurate time and date during power failures. Designed for various applications such as office equipment (fax, printers, copiers), telecommunications (routers, switches, servers), utility meters, vending machines, thermostats, and modems. Operating over a voltage range of 1.71V to 5.5V and an temperature range from -40°C to 85°C, it supports crystal ESR up to 100Kohm, optimizing for cost and space. Low power consumption (typical 250nA) ensures extended battery backup time. It features a programmable square wave output, simple serial interface compatible with most microcontrollers, UL recognition, and management of all timekeeping functions with unlimited writes to the RAM.

Authorized Distributors
Source:Newark
Part No:DS1308U-18+
Stock:316
Inv Date:06-05-2026
Price: Unit price: $5.83
Buy/RFQ:
Source:DigiKey
Part No:DS1308U-18+
Stock:433
Inv Date:06-05-2026
Price: Unit price: $5.94
Buy/RFQ:
Part No:DS1308U-18+
Stock:80
Inv Date:06-06-2026
Price: Unit price: $5.84
Buy/RFQ:

MAXIM INTEGRATED / ANALOG DEVICES DS1308U18 Real-Time Clock Module Specifications:

  • Package: 8-pin µSOP
  • Voltage Range: 1.71V to 5.5V
  • Temperature Range: -40°C to 85°C
  • Crystal ESR: Up to 100KΩ
  • Memory: 56 bytes NV RAM
  • Timekeeping Accuracy: ±2 minutes/month (typical)
  • Time Format: 12-hour or 24-hour with AM/PM indicator
  • Calendar: Auto-adjusts end-of-month and leap years
  • Low Power Consumption: 250nA (typical)
  • Square Wave Output: Programmable frequencies
  • External Crystal: 32.768kHz, load capacitance 6pF
  • Power-Fail Detection: Yes, switches to backup power
  • Application Range: Office, telecom, utility, vending, thermostats, modems

Buy the Buy Maxim Low-Power RTC Part Number DS1308U-18+ Online

Purchase the Maxim DS1308U-18+ online today. This low-power RTC with 56-byte NV RAM is ideal for time-sensitive applications requiring accurate calendar functions, leap year corrections, and robust backup power management. Its simple I2C interface allows easy integration with microcontrollers, supporting a wide voltage range and temperature operation. With programmable square wave output and extensive memory, it enhances device reliability in networking, office equipment, utilities, and consumer electronics. Order now for fast delivery and reliable performance in your projects.

Get Maxim DS1308U-18+ today—optimized for accurate timekeeping and extended battery backup in various electronic systems.

Frequently Asked Questions

Where can I buy MAXIM INTEGRATED / ANALOG DEVICES DS1308U18?

You can click on the BUY or RFQ button to purchase DS1308U18 from an authorized MAXIM INTEGRATED / ANALOG DEVICES distributor.

How do I troubleshoot issues or seek technical support for part DS1308U18?

You can download the DS1308U18 datasheet or visit the MAXIM INTEGRATED / ANALOG DEVICES website for support.

Who is the manufacturer of DS1308U18?

MAXIM INTEGRATED / ANALOG DEVICES

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