Product Summary

The DS1243Y-150 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-150 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 corrupted data in both the memory and real time clock.

Parametrics

DS1243Y-150 absolute maximum ratings: (1)Voltage on Any Pin Relative to Ground: –0.3V to +7.0V; (2)Operating Temperature: 0 to 70℃; (3)Storage Temperature: –40 to +70℃; (4)Soldering Temperature: 260℃ for 10 seconds (See Note 13).

Features

DS1243Y-150 features: (1)Real time clock keeps track of hundredths of seconds, seconds, minutes, hours, days, date of the month, months, and years; (2)8K 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)Lithium energy source is electrically disconnected to retain freshness until power is applied for the first time; (7)Standard 28–pin JEDEC pinout; (8)Full ±10% operating range; (9)Operating temperature range 0℃ to 70℃; (10)Accuracy is better than ±1 minute/month @25℃; (11)Over 10 years of data retention in the absence of power; (12)Available in 120, 150 and 200 ns access time.

Diagrams

DS1243Y-150 block diagram

DS12
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