UT04VS50P Datasheet, PDF (1/21 Pages) Aeroflex Circuit Technology – UT04VS50P Voltage Supervisor

Standard Products
UT04VS50P Voltage Supervisor
Data Sheet
July 28, 2014
www.aeroflex.com/VoltSupv
FEATURES
 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 -55^oC to +125^oC
 Low Power Typical 1000A
 Tolerance Select Input Pin (5% & 10%)
 RESET, RESETB, VOUT1, VOUT2, VOUT3 and VOUT4
guaranteed to be in the correct state for V_DD down to 1.2V
 Packaging options:
- 28-lead ceramic dual flatpack
 Operational environment:
- Total dose: 300 krad(Si)
- SEL Immune: <110 MeV-cm²/mg @125^oC
- SET Immune: <109MeV-cm²/mg
 Standard Microelectronics Drawing (SMD) 5962-13206
- QML Q and V
INTRODUCTION
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 V_SS, four
independent supplies are monitored for an under-voltage
condition. In the second mode when the OVSH pin is connected
to V_DD, under-voltage and over-voltage 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. The margin (or tolerance) to the given threshold
voltage, for under-voltage monitoring, is determined by the
setting of the TOL pin. The logic sense of the channel 3 and 4
outputs can be inverted by setting the INV pin, appropriately.
Also, MRB, master reset, provides a means for a manual input
to activate the RESET signals. In addition, the user can adjust
two timing parameters by the addition of external capacitors to
the device. These are the response times of the channel VOUTx
signal when the associated input returns to a valid level,
implemented by a capacitor connected to CDLYx and the time
to clear RESET (and RESETB) when a channel enable or input
level becomes valid; implemented by CRESET.
APPLICATION
The UT04VS50P supervisory circuit reduces the complexity and
number of circuits required to monitor power supply and battery
functions in microprocessor, DSP, microcontroller, ASIC and
FPGA systems. The UT04VS50P supervisory circuit
significantly improves system reliability and accuracy over
comparable systems that use separate ICs or discrete
components.
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