MAXIM DS1245W-150

The DS1245W 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 DS1245W devices can be used in place of existing 128k x8 static RAMs directly conforming to the popular bytewide 32-pin DIP standard. DS1245W 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.

• 10 years minimum data retention in the absence of external power
• Data is automatically protected during power loss
• Replaces 128k x 8 volatile static RAM, EEPROM or Flash memory
• Unlimited write cycles
• Low-power CMOS
• Read and write access times of 100ns
• Lithium energy source is electrically disconnected to retain freshness until power is applied for the first time
• Optional industrial temperature range of -40℃ to +85℃, designated IND
• JEDEC standard 32-pin DIP package
• 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