UT04VS33P Datasheet, PDF (1/21 Pages) Aeroflex Circuit Technology – UT04VS33P Voltage Supervisor

Standard Products
UT04VS33P Voltage Supervisor
Data Sheet
July 28, 2014
www.aeroflex.com/VoltSupv
FEATURES
 3.0V to 3.6V 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 UT04VS33P 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, a 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, and a
fourth selection which 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, then 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.
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 UT04VS33P 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 UT04VS33P supervisory circuit
significantly improves system reliability and accuracy over
comparable systems that use separate ICs or discrete
components.
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