QuickView - DS1243, DS1243Y 64k NV SRAM with Phantom Clock

Description

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The DS1243Y 64K NV SRAM with Phantom Clock is a fully static nonvolatile RAM (organized as 8192 words by 8 bits) with a built-in real time clock. The DS1243Y has a self-contained lithium energy source and control circuitry, which constantly monitors V_CC 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 corrupted data in both the memory and real time clock. The Phantom Clock provides timekeeping information including hundredths of seconds, seconds, minutes, hours, day, date, month, and year information. 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.

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

Key Features

Real-Time Clock Keeps Track of Hundredths of Seconds, Seconds, Minutes, Hours, Days, Date of the Month, Months, and Years
8k x 8 NV SRAM Directly Replaces Volatile Static RAM or EEPROM
Embedded Lithium Energy Cell Maintains Calendar Operation and Retains RAM Data
Watch Function is Transparent to RAM Operation
Month and Year Determine the Number of Days in Each Month; Valid Up to 2100
Lithium Energy Source is Electrically Disconnected to Retain Freshness Until Power is Applied for the First Time
Standard 28-Pin JEDEC Pinout
Full ±10% Operating Range
0°C to +70°C Operating Temperature Range
Accuracy is Better than ±1 Minute/Month at +25°C
Over 10 Years of Data Retention in the Absence of Power
Available in 120ns and 150ns Access Time
Available in Lead-Free Package
Underwriters Laboratories (UL®) Recognized