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状况：生产中。

概述

完整的数据资料 (PDF, 86kB) 英文 下载 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.

关键特性

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% 通过美国保险商实验室协会(UL®)认证

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