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电路监控、电压监测器及排序器 
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MyMaxim 订阅
主要特征
- Controller circuitry with monitoring and logic functions to make CMOS RAM nonvolatile
- Controls up to 8 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:
- DS1211: 0°C to +70°C
- DS1211-IND: -40° to +85°C
- Voltage/tolerances: 5V ±5% or ±10%
应用/用途
描述
The DS1211 Nonvolatile Controller x8 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 4.5 volts to 4.25 volts.
By combining the DS1211 nonvolatile controller/decoder chip and lithium batteries, nonvolatile RAM operation can be achieved for up to eight CMOS memories.
By combining the DS1211 nonvolatile controller/decoder chip and lithium batteries, nonvolatile RAM operation can be achieved for up to eight CMOS memories.
Technical Docs
| 数据资料 | 1带8非易失控制器芯片 | Nov 18, 1999 |
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