LTC694CS8-3.3#PBF

LINEAR TECHNOLOGY  LTC694CS8-3.3#PBF  监控器, 高电平有效, 低电平有效复位, 3V-5.5V输入, SOIC-8

The is a microprocessor Supervisory Circuit provides complete 3.3V power supply monitoring and battery control functions. These include power-on reset, battery back-up, RAM write protection, power failure warning and watchdog timing. The device is pin compatible upgrades of the LTC694 that is optimized for 3.3V systems. Operating power consumption has been reduced to 0.6mW typical and 3µW maximum in battery back-up mode. Microprocessor reset and memory write protection are provided when the supply falls below 2.9V. The RESET output is guaranteed to remain logic low with VCC as low as 1V. The LTC694-3.3 power the active RAMs with a charge pumped NMOS power switch to achieve low dropout and low supply current. When primary power is lost, auxiliary power, connected to the battery input pin, powers the RAMs in standby through an efficient PMOS switch.

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Minimum external component count

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Voltage monitor for power-fail or low-battery warning

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Thermal limiting

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Performance specified over-temperature

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Fast 30ns typical onboard gating of RAM chip enable signals

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2.90V Precision voltage monitor

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1µA Maximum standby current