Product Summary

The DS1244Y-100 is a fully static nonvolatile RAM (NV SRAM) (organized as 32k words by 8 bits) with a built-in real-time clock. The DS1244Y-100 has a self-contained lithium energy source and control circuitry, which constantly monitors VCC for an out-of-tolerance condition. When such a condition occurs, the lithium energy source is automatically switched on and write protection is unconditionally enabled to prevent garbled data in both the memory and real-time clock. The DS1244Y-100 phantom clock provides timekeeping information for hundredths of seconds, seconds, minutes, hours, days, date, months, and years. The date at the end of the month is automatically adjusted for months with fewer than 31 days, including correction for leap years. The phantom clock operates in either 24-hour or 12-hour format with an AM/PM indicator.

Parametrics

DS1244Y-100 absolute maximum ratings: (1)Voltage Range on Any Pin Relative to Ground: -0.3V to +6.0V; (2)Storage Temperature Range: -40 to +85℃.

Features

DS1244Y-100 features: (1)Real-Time Clock (RTC) Keeps Track of Hundredths of Seconds, Minutes, Hours, Days, Date of the Month, Months, and Years; (2)32k x 8 NV SRAM Directly Replaces Volatile Static RAM or EEPROM; (3)Embedded Lithium Energy Cell Maintains Calendar Operation and Retains RAM Data; (4)Watch Function is Transparent to RAM Operation; (5)Month and Year Determine the Number of Days in Each Month; Valid Up to 2100; (6)Full 10% Operating Range; (7)Operating Temperature Range: 0 to +70℃; (8)Over 10 Years of Data Retention in the Absence of Power; (9)Lithium Energy Source is Electrically Disconnected to Retain Freshness Until Power is Applied for the First Time; (10)DIP Module Only; (11)Standard 28-Pin JEDEC Pinout; (12)PowerCapR Module Board Only; (13)Available in Lead-Free Package.

Diagrams

DS1244Y-100 block diagram

DS12
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