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3.3V 1024k Nonvolatile SRAM with Battery Monitor

Product Details

Key Features

Parametric specs for Memory (EPROM, EEPROM, ROM, NV SRAM)
Memory Type NV SRAM
Memory Size 128K x 8
Bus Type Parallel
VSUPPLY (V) (min) 3
VSUPPLY (V) (max) 3.6
Package/Pins PWRCP/34
Budgetary
Price (See Notes)
18.95
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Simplified Block Diagram

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Parameters

Parametric specs for Memory (EPROM, EEPROM, ROM, NV SRAM)
Memory Type NV SRAM
Memory Size 128K x 8
Bus Type Parallel
VSUPPLY (V) (min) 3
VSUPPLY (V) (max) 3.6
Package/Pins PWRCP/34
Budgetary
Price (See Notes)
18.95

Key Features

  • 10 years minimum data retention in the absence of external power
  • Data is automatically protected during power loss
  • Power supply monitor resets processor when VCC power loss occurs and holds processor in reset during VCC ramp-up
  • Battery monitor checks remaining capacity daily
  • Read and write access times of 100ns
  • Unlimited write cycle endurance
  • Typical standby current 50µA
  • Upgrade for 128k 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
  • 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

Applications/Uses

Description

The DS1345W 3.3V 1024k NV 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. Additionally, the DS1345W has dedicated circuitry for monitoring the status of VCC and the status of the internal lithium battery. DS1345W 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 128k x 8 SRAM, EEPROM or Flash components.

Simplified Block Diagram

DS1345W: Pin Assignment DS1345W: Pin Assignment Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .