Top

Nonvolatile Controller X 16 Chip

Product Details

Key Features

Simplified Block Diagram

Technical Docs

Data Sheet Nonvolatile Controller X 16 Chip Nov 18, 1999

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 .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.

Key Features

  • Controller circuitry with monitoring and logic functions to make CMOS RAM nonvolatile
  • Controls up to 16 memories
  • Monitors Vcc and write-protects when out of tolerance
  • Consumes less than 100nA battery current
  • Tests battery condition on power-up
  • Supports redundant batteries
  • Thermal operating ranges:
    • DS1212: 0°C to +70°C
    • DS1212-IND: -40° to +85°C
  • Voltage/power-fail tolerances: 5V ±5% or ±10%

Applications/Uses

Description

The DS1212 Nonvolatile Controller x16 Chip performs five circuit functions required to render standard CMOS RAM nonvolatile:
  • Monitor Vcc using a precise comparator that detects power-fail and inhibits chip-enable
  • Monitor battery status and warn the processor of low status
  • Switch power between a battery and Vcc, whichever is greater
  • Write-protect data
  • Provide for automatically switching between two batteries
Power-fail detection occurs in the range of 4.75V to 4.5V with the tolerance Pin 3 grounded. If Pin 3 in connected to Vcco, then power-fail detection occurs in the range of 4.5V to 4.25V. By combining the DS1212 nonvolatile controller/decoder chip with lithium batteries, nonvolatile RAM operation can be achieved for up to 16 CMOS memories.

Simplified Block Diagram

DS1212: Pin Assignment DS1212: Pin Assignment Zoom icon

Technical Docs

Data Sheet Nonvolatile Controller X 16 Chip Nov 18, 1999

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 .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.