实时时钟, 时钟芯片, 计时器系列存储器, NVSRAM, BYTEWIDE, 4.5 V至5.5 V, EDIP-32
- DS1556-70IND+ Datasheet
- Supply voltage range is 4.5V to 5.5V
- Operating temperature range from -40°C to 85°C
- Integrated NV SRAM, RTC, crystal, power fail control circuit and lithium energy source
- Clock registers are accessed identically to static RAM, registers reside in the 16 top RAM locations
- Totally non-volatile with over 10 years of operation in absence of power
- Precision power-on reset, programmable watchdog timer and RTC alarm
- Battery voltage level indicator flag
- Power fail write protection allows for ±10% VCC power supply tolerance
- Lithium energy source is electrically disconnected to retain freshness
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