LTC2956IMS-1#PBF

LTC2956 is a micropower, wide input voltage range, configurable wake-up timer with pushbutton control. It periodically wakes up and turns on a connected system to perform tasks like monitoring temperature or capturing images. After completing the task, this device turns the system off to conserve power. The system awake time can be controlled by the input pulse at the SLEEP pin or adjusted by the capacitor at the ONMAX pin. The pushbutton input allows the user to shutdown, turn on or reset the wake-up timer. With the timer in shutdown, the quiescent current drops to 300nA. It also provides three status outputs to indicate mode transitions and pushbutton events. Two versions are available for applications requiring either positive or negative enable polarities. It is used in application such as heartbeat timers, periodic wake-up control, portable and battery-powered equipment, intervalometers, data acquisition etc.

• Supply input range is 1.5V to 36V
• Adjustable wake-up period: 250ms to 39 days
• Adjustable maximum awake time
• Quiescent current is 0.8µA typical at (sleep state, PB Hi, TA = 25°C, VIN = 3.3V, RCOM = 100K)
• Shutdown current is 0.3µA typical at (off state, PB Hi, TA = 25°C, VIN = 3.3V, RCOM = 100K)
• Low leakage EN output allows DC/DC converter control
• ±25KV ESD HBM on active-low PB input
• Undervoltage lockout is 1.24V typical at (VIN rising, TA = 25°C, VIN = 3.3V, RCOM = 100K)
• Operating temperature is -40°C to 85°C
• Package style is 12-lead plastic MSOP

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