DS1338 I2C RTC: Pinout, Equivalent and Datasheet

Pinout

Symbol

Footprint

3D Model

The DS1338 serial real-time clock (RTC) is a lowpower, full binary-coded decimal (BCD) clock/calendar plus 56 bytes of NV SRAM. Address and data are transferred serially through an 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. The clock operates in either the 24-hour or 12-hour format with AM/PM indicator. The DS1338 has a built-in powersense circuit that detects power failures and automatically switches to the backup supply, maintaining time and date operation. The DS1338 operates as a slave device on the serial bus. Access is obtained by implementing a START condition and providing a device identification code, followed by data. The DS1338 supports the I²C protocol. A device that sends data onto the bus is defined as a transmitter and a device receiving data is a receiver. The device that controls the message is called a master. The devices that are controlled by the master are referred to as slaves.

This article provides you with a basic overview of the DS1338 I²C RTC, including its pin descriptions, features and specifications, etc., to help you quickly understand what DS1338 is.

● Completely Manages All Timekeeping Functions

   ◆ RTC 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, General-Purpose RAM with Unlimited Writes

   ◆ Programmable Square-Wave Output Signal

● Surface-Mount Package with an Integrated Crystal (DS1338C) Saves Additional Space and Simplifies Design

● Interfaces with Most Microcontrollers

   ◆ I²C Serial Interface

● Low-Power Operation Extends Battery Backup Run Time

   ◆ Automatic Power-Fail Detect and Switch Circuitry

● -40°C to +85°C Industrial Temperature Range Supports Operation in a Wide Range of Applications

● Underwriters Laboratories (UL®) Recognized

Maxim Integrated DS1338Z-33 technical specifications, attributes, parameters and parts with similar specifications to Maxim Integrated DS1338Z-33.

Block Diagram

Timing Diagram

Typical Operating Circuit

● Handhelds (GPS, POS Terminal)

● Consumer Electronics (Set-Top Box, Digital Recording, Network Appliance)

● Office Equipment (Fax/Printer, Copier)

● Medical (Glucometer, Medicine Dispenser)

● Telecommunications (Router, Switcher, Server)

● Other (Utility Meter, Vending Machine, Thermostat, Modem)

The market is evolving. The rules are changing. To keep your time to market short, you need integration at every level—from silicon to the supply chain. Count on Maxim Integrated to help you overcome design and architectural challenges, with integrated solutions for the industrial, medical, consumer, automotive, energy, computing, and communications realms. Maxim Integrated is also your source for power, interface, and even digital products that work in the analog world. And they're glad to support you with reference designs, tools, technical documents, packaging, and more. We invite you to explore their latest analog integration offerings.

Download datasheets and manufacturer documentation for Maxim Integrated DS1338Z-33.