Maxim > Products > Real-time clocks (RTCs) > DS1553, DS1553P

DS1553, DS1553P
64kB, Nonvolatile, Year-2000-Compliant Timekeeping RAM

Overview

Technical Documents

Ordering Info

User Comments (0)

All

Status
Part Number	Status
DS1553	Active: In production, but some versions are no longer available. See Ordering Information.
DS1553P	Active: In production, but some versions are no longer available. See Ordering Information.

Description

FULL DATA SHEET Download Rev 2 (PDF, 460kB) E-Mail The DS1553 is a full-function, year-2000-compliant (Y2KC) real-time clock/calendar (RTC) with an RTC alarm, watchdog timer, power-on reset, battery monitor, and "8k x 8 nonvolatile static RAM (NV SRAM)." User access to all registers within the DS1553 is accomplished with a bytewide interface as shown in Figure 1. The RTC registers contain century, year, month, date, day, hours, minutes, and seconds data in 24-hour BCD format. Corrections for day of month and leap year are made automatically.

This product contains lithium-metal batteries. See applicable regulations for transport requirements for batteries in equipment.

Key Features

Integrated NV SRAM, RTC, Crystal, Power-Fail Control Circuit, and Lithium Energy Source Clock Registers are Accessed Identically to the Static RAM; These Registers are Resident in the 16 Top RAM Locations Totally Nonvolatile with Over 10 Years of Operation in the Absence of Power Precision Power-On Reset Programmable Watchdog Timer and RTC Alarm BCD-Coded Year, Month, Date, Day, Hours, Minutes, and Seconds with Automatic Leap Year Compensation Valid Up to the Year 2100 Battery Voltage Level Indicator Flag Power-Fail Write Protection Allows for ±10% VCC Power-Supply Tolerance Lithium Energy Source is Electrically Disconnected to Retain Freshness Until Power is Applied for the First Time Underwriters Laboratories (UL®) Recognized

Diagram

Block Diagram

Related Products
DS9034PCX	PowerCap with Crystal
More Like This: View Product Families for Similar Products See All Timekeeping & Real-Time Clocks (82 Products)

More Information

Other Watchdog Clocks

Didn't Find What You Need?

Next Day Product Selection Assistance from Applications Engineers Parametric Search Applications Help

Rev 2; 2005-07-14
This page last modified: 2009-09-24