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Internal monitoring of Vcc (primary voltage) with switchover to Vbat (back-up battery) |
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RESET output (/RST) when Vcc drops below customer specified, factory programmed “power fail detect” (Vpfd) threshold |
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Low battery voltage signal (/BLD) indicate if battery is good either prior to or after encapsulation |
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Tamper Detection and Security Alarm (/SAL, Open Drain) |
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4 independent high impedance physical tamper inputs (TP1-4) with built-in glitch immunity |
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Continuous monitoring of Supply Voltage (Vcc or Vbat) level, over or under operating voltage levels trigger alarm |
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Built in temperature sensor to monitor temperature, over and under temperature alarm trigger levels are factory-programmed (on STM1404 only) |
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/SAL is issued if any one of the above tamper conditions are triggered |
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Low Current (Ibat) in battery backup (Vbat) mode (targets only) |
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STM1403: 3.0mA (typ) |
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STM1404: 5.5mA (typ, at ambient temperature and 3.6V); 9.0mA (max) with continuous monitoring of Vcc, temperature and physical tamper pins (TPx) |
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Manual Reset (/MR) input provided (similar to the STM704 Supervisor) |
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PFI, /PFO (Open Drain, Active Low Output) provided to monitor any other voltage |
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Reference Voltage (Option on the STM1403A and STM1404A) |
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Vref of 1.237V provided on separate pin with Isource: 25mA (typ) |
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Can be used as a reference to an ADC or as a source for a random noise generator |
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Product available in extended 3.0V ranges (2.2V to 3.6V) |
