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UT04VS50P: DescriptionUT04VS50P Voltage Supervisor; File Size252KB，21 Pages; ManufacturerAeroflex; Websitehttp://www.aeroflex.com/

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UT04VS50P Voltage Supervisor

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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

C to +125

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

down to 1.2V

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

, four

independent supplies are monitored for an under-voltage

condition. In the second mode when the OVSH pin is connected

to V

, 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.



Packaging options:

- 28-lead ceramic dual flatpack



Operational environment:

- Total dose: 300 krad(Si)

- SEL Immune: <110 MeV-cm

/mg @125

- SET Immune: <109MeV-cm

/mg



Standard Microelectronics Drawing (SMD) 5962-13206

- QML Q and V

UT04VS50P Related Products

	UT04VS50P	UT04VS50P-XCC	UT04VS50P-XPC
Description	UT04VS50P Voltage Supervisor	UT04VS50P Voltage Supervisor	UT04VS50P Voltage Supervisor

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