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- Voltage detector IC  
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Low Power Battery Monitor with Hysteresis Control
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General Description:
The CN312 is an ultra-low power high accuracy battery monitor with hysteresis control, and is specially designed for monitoring single or multi lithium-ion (Li+) cells, multi-cell alkaline, NiCd, NiMH and multi-cell lead acid batteries.
The CN312 allows for wide hysteresis by adjusting the rising and falling threshold independently. The threshold accuracy is ±1%.
If the monitored voltage is lower than the falling threshold, LBO pin becomes high and LBO- pin becomes low; If the monitored voltage is higher than the rising threshold, LBO pin becomes low and LBO- pin becomes high after a delay of tD.
The hysteresis eliminates the output chatter sometimes associated with battery voltage monitors, usually due to input voltage noise or battery terminal voltage recovery after load removal.
The device offers both active-low and active-high battery detection outputs.
The device is available in 6 pin SOT23 package.
Battery-powered Systems Multi-cell Alkaline, NiCd or NiMH Batteries Monitoring
Multi-cell Li+ Batteries Monitoring Multi-cell Lead Acid Batteries Monitoring
Precise Threshold: ±1%
Adjustable Hysteresis to Eliminate the Output Chatter
35ms typical power-on reset pulse width
Active-low and Active-high CMOS Outputs
2.7μA Supply Current @VCC=3V
Power Supply Transient Immunity
Operating Temperature Range -40°C to +85°C
Available in SOT23-6
Lead-free, Rohs-compliant and Halogen-free
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