Maxim DS1553-100

Часы/календарьСигнализация, високосный год, NVSRAM, сторожевой таймер, Y2K8 КБ

Overview

The DS1553-100 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. User access to all registers within the DS1553-100 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.

■ 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

Features

Applications

• Copy machines
• Mobile equipment
• Battery powered devices
• Printers and copiers
• Electronic metering
• Digital cameras
• White goods
• Elapsed time counter
• Network powered devices
• Battery backed up systems