QuickView - DS1212 비휘발성 컨트롤러 X 16칩

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The DS1212 Nonvolatile Controller x16 Chip performs five circuit functions required to render standard CMOS RAM nonvolatile:

Monitor V_cc 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 V_cc, 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 V_cco, 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.

주요기능

Controller circuitry with monitoring and logic functions to make CMOS RAM nonvolatile
Controls up to 16 memories
Monitors V_cc 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%
UL® (Underwriters Laboratories) 인증 획득