DS1350W

• 10 years minimum data retention in the absence of external power
• Data is automatically protected during power loss
• Power supply monitor resets processor when V_CC power loss occurs and holds processor in reset during V_CC rampup
• Battery monitor checks remaining capacity daily
• Read and write access times as fast as 150 ns
• Unlimited write cycle endurance
• Typical standby current 50 mA
• Upgrade for 512K x 8 SRAM, EEPROM or Flash
• Lithium battery is electrically disconnected to retain freshness until power is applied for the first time
• Optional industrial temperature range of 40°C to +85°C, designated IND
• New PowerCap Module (PCM) package
Directly surfacemountable module
Replaceable snapon PowerCap provides lithium backup battery
Standardized pinout for all nonvolatile SRAM products
Detachment feature on PowerCap allows easy removal using a regular screwdriver

Voltage On Any Pin Relative To Ground ..................................0.3V to +4.6V
Operating Temperature .............0°C to 70°C, 40°C to +85°C for IND parts
Storage Temperature ..........40°C to +70°C, 40°C to +85°C for IND parts
Soldering Temperature ...............................................260°C For 10 seconds

* This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability.

The DS1350W 3.3V 4096K Nonvolatile SRAM is a 4,194,304bit, fully static, nonvolatile SRAM organized as 524,288 words by eight bits. Each NV SRAM has a selfcontained lithium energy source and control circuitry which constantly monitors V_CC for an outoftolerance condition. When such a condition occurs, the lithium energy source is automatically switched on and write protection is unconditionally enabled to prevent data corruption. Additionally, the DS1350W has dedicated circuitry for monitoring the status of V_CC and the status of the internal lithium battery. DS1350W 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. The devices can be used in place of 512K x 8 SRAM, EEPROM or Flash components.