UT04VS50P Quad 5V Voltage Supervisor


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The UT04VS50P is a radiation-hardened Voltage Supervisor which simultaneously monitors up to four supply levels utilized in a system, providing status output for each signal, VOUTx, as well as system reset signal if any of the monitored signals moves out of range. To set the monitor trip points, the TH0 and TH1 pins allow the selection of three sets of preset threshold levels per channel, determined by an internal bandgap voltage reference, to reduce supply and temperature variance. A fourth selection allows the user to determine the level for each channel. There are two modes of operation, determined by the OVSH pin. In the first mode, when the OVSH pin is connected to VSS, four independent supplies are monitored for an under-voltage condition. In the second mode when the OVSH pin is connected to VDD, under-voltage and overvoltage of the inputs are monitored. In this mode, two supplies can be monitored using channels 1 and 3 or channels 2 and 4, respectively. For flexibility, both system RESET and RESETB outputs are available for interfacing to the system. Each channel has an enable, ENx, allowing use of one, two, three or all four monitor channels.  This device includes a 3V regulator that supplies power to the internal circuitry.


 4.5V to 5.5V Operating voltage range
 6 Fixed Threshold Voltage Monitors (3.3V, 2.5V, 1.8V, 1.5V, 1.2V, 1.0V)
 Fixed & Adjustable Threshold Voltage Select modes
 Threshold Voltage Select with TH0, TH1 pins
 Adjustable RESET Timeout with external capacitor
 Independent Voltage Monitoring and Sequencing
 Manual Reset Input Pin
 Active Low and Active High RESET pins
 Output Voltages Open Drain
 Two VOUTS active high and two VOUTS programmable with INV Pin
 RESET, RESETB Outputs Open Drain
 Over-voltage Detection Mode
 Operating Temperature Range -55oC to +125oC
 Low Power Typical 1000µA
 Tolerance Select Input Pin (5% & 10%)
 RESET, RESETB, VOUT1, VOUt2, VOUT3 and VOUT4 guaranteed to be in the correct state for VDD down to 1.2V
 Packaging options:
- 28-lead ceramic dual flatpack
 Operational environment:
- Total dose: 300 krad(Si)
- SEL Immune: <110 MeV-cm2/mg @125oC
- SET Immune: <109MeV-cm2/mg
 Standard Microelectronic Drawing 5962-13206



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