The DS1308U-33+ is a versatile and low-power real-time clock (RTC) from Maxim Integrated that provides a full binary-coded decimal (BCD) clock/calendar with 56 bytes of NV SRAM. Address and data are transferred serially via a 2-wire, bi-directional I²C interface. The clock/calendar provides seconds, minutes, hours, day, date, month, and year information. The end of the month date is automatically adjusted for months with fewer than 31 days, including corrections for leap year.

Operating within the 2.0V to 5.5V voltage range at a temperature range of -40°C to +85°C, the DS1308U-33+ is designed for digital systems requiring low-power consumption, an I²C interface, and long-term data retention without external power. The device's energy needs are minimal, making it particularly suitable for battery-backed non-volatile timekeeping in a wide array of products.

Key features of the DS1308U-33+ include:

• Completely Manages All Timekeeping Functions
• Real-Time Clock Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the Week, and Year with Leap-Year Compensation Valid Up to 2100
• 56-Byte, Battery-Backed, Nonvolatile (NV) RAM for Data Storage
• Two-Wire Serial Interface (I²C)
• Low Power Operation Extends Battery Backup Run Time
• 2.0V to 5.5V Full Operation
• Surface-Mount Package with an Operating Temperature Range of -40°C to +85°C

The DS1308U-33+ is encapsulated in an 8-pin µSOP package, making it compact and suitable for space-constrained applications. Its integrated crystal oscillator improves long-term accuracy and reduces the number of external components required for operation.

This RTC is ideal for applications such as embedded systems, utility meters, industrial controllers, and consumer electronics that require accurate timekeeping under varying environmental conditions. With its robust feature set and Maxim Integrated's reputation for quality, the DS1308U-33+ is a reliable choice for maintaining precise time in your electronic projects.