DS1245WP-100

Product Summary

The DS1245WP-100 3.3V 1024k Nonvolatile SRAM is a 1,048,576-bit, fully static, nonvolatile SRAM organized as 131,072 words by 8 bits. Each NV SRAM 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 data corruption. DIP-package DS1245WP-100 devices can be used in place of existing 128k x 8 static RAMs directly conforming to the popular bytewide 32-pin DIP standard. DS1245WP-100 devices in the PowerCap Module package are directly surface mountable and are normally paired with a DS9034PC PowerCap to form a complete Nonvolatile SRAM module. There is no limit on the number of write cycles that can be executed and no additional support circuitry is required for microprocessor interfacing.

Parametrics

DS1245WP-100 absolute maximum ratings: (1)Voltage on Any Pin Relative to Ground: -0.3V to +4.6V; (2)Operating Temperature Range: Commercial: 0℃ to +70℃; Industrial: -40℃ to +85℃; (3)Storage Temperature Range: EDIP -40℃ to +85℃; PowerCap -55℃ to +125℃; (4)Lead Temperature (soldering, 10s): +260℃; (5)Soldering Temperature (reflow, PowerCap): +260℃.

Features

DS1245WP-100 features: (1)10 years minimum data retention in the absence of external power; (2)Data is automatically protected during power loss; (3)Replaces 128k x 8 volatile static RAM, EEPROM or Flash memory; (4)Unlimited write cycles; (5)Low-power CMOS; (6)Read and write access times of 100ns; (7)Lithium energy source is electrically disconnected to retain freshness until power is applied for the first time; (8)Optional industrial temperature range of -40℃ to +85℃, designated IND; (9)JEDEC standard 32-pin DIP package; (10)PowerCap Module (PCM) package: Directly surface-mountable module; Replaceable snap-on PowerCap provides lithium backup battery; Standardized pinout for all nonvolatile SRAM products; Detachment feature on PowerCap allows easy removal using a regular screwdriver.

Diagrams