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PDF UT01VS50D Data sheet ( Hoja de datos )

Número de pieza UT01VS50D
Descripción Voltage Supervisor
Fabricantes Aeroflex Circuit Technology 
Logotipo Aeroflex Circuit Technology Logotipo



Total 14 Páginas
		
UT01VS50D Hoja de datos, Descripción, Manual
Standard Products
UT01VS50D Voltage Supervisor
Data Sheet
July 28, 2014
www.aeroflex.com/voltsupv
FEATURES
4.75V to 5.5V Operating voltage range
Power supply (VDD) monitor set by the internal voltage
reference at 4.65V
Precision Input Voltage Monitor using an internal 1.25V
voltage reference
Watchdog Timer Circuit monitoring activity on WDI input
- Nominal timeout 1.6s
RESET_OD output responding to the VDD monitor and the
manual reset input MR
- Nominal RESET_OD pulse width 200ms
RESET_OD level valid for VDD>=1.2V
Operating Temperature Range -55oC to +125oC
Low Power, Typical 400uA
Operational environment:
- Total dose: 300 krad(Si)
- SEL Immune: <110 MeV-cm2/mg @125oC
- SET Immune: <80 MeV-cm2/mg
Packaging options:
- 8-lead dual-in-line flatpack
Standard Microelectronics Drawing (SMD) 5962-11213
- QML Q and V
INTRODUCTION
The UT01VS50D’s function is to monitor vital supply and signal
voltages in microprocessor systems. It provides for safe reset
during power up, power down and brownout conditions by using
an internal precision voltage reference.
The UT01VS50D monitors activity at an independent watchdog
input by employing an internal timer and a watchdog output that
goes low if the input is not toggled within 1.6s. It provides for
precision voltage threshold detection on an independent voltage
input which could be used for battery or supply-low monitoring
of a supply voltage other than VDD.
The UT01VS50D includes an active low manual reset with an
open drain output.
APPLICATIONS
Voltage Supervisor function for various systems including
microprocessors, microcontrollers, DSPs and FPGAs
Critical battery and power supply monitoring
Replacement of older discrete solutions to improve reliability,
accuracy and reduce complexity of the systems
MR
RESET &
DIGITAL CONTROL
VDD +
-
WDI TIMER
4.65 V
GND
VREF
1.25 V
WDI TRANSITION
DETECTOR
OSC
-
PFI +
WDO
RESET_OD
WDI
PFO
Figure 1. UT01VS50D Functional Block Diagram
1

1 page

UT01VS50D pdf
ELECTRICAL CHARACTERISTICS 1,2
(VDD = 4.75V to 5.5V:-55°C < TC < +125°C)
SYMBOL
PARAMETER
CONDITION
Power Supply
IDD VDD supply current
VDD=5.5V
Digital Inputs and Outputs (MR, RESET_OD, WDI, WDO, PFO)
VIL Digital input low
VDD=4.75V
VIH Digital input high
VDD=5.5V
VIL_MR
Manual reset input low
VDD=4.75V
VIH_MR
Manual reset input high
VDD=5.5V
VOL Digital output low
VDD=4.75V, IOL =3.2mA
VOL_RESET_OD RESET_OD digital output low
VDD=4.75V
ISINK=3.2mA
VOH3
Digital output high
VDD=4.75V, IOH =800μA
Timing and Threshold Voltages
tRST-ASSRT4
VDD falling reset assertion
VDD < 4.5V
tRS Reset pulse width
VDD=4.75V
tWD Watchdog time-out period
VDD=5.5V
tWP
Watchdog input pulse width
VDD=4.75V, VIL = 0.4V,
VIH =0.8XVDD
VRT Reset threshold voltage
VRTHYS
Reset threshold voltage hysteresis
tMR Manual reset (MR) input pulse VDD=4.75V
width
tMD Manual reset (MR) to reset out VDD=4.75V
delay
Analog Input PFI
IPFI Threshold detector input (PFI) VDD=5.5V
current
VPFI Threshold detector input (PFI) VDD=5.0V
threshold voltage
IMR
Manual reset pull-up current
VDD=5.5V, MR=0.0V
IWDI
Watchdog input (WDI) current
WDI pin = VDD = 5.5V
WDI pin = 0V; VDD = 5.5V
tRPFI
PFI rising threshold crossing to
PFO delay
tFPFI PFI falling threshold crossing to
PFO delay
5
MIN MAX UNIT
530 μA
0.8 V
3.5 V
0.8 V
2.0 V
0.4 V
0.4 V
VDD - 1.5
V
0.2 0.8 μs
140 280 ms
1.0 2.25 s
50 ns
4.5 4.75 V
20 mV
150 ns
100 ns
-20 20 nA
1.20 1.30 V
-500 -100 μA
35 μA
-35
15 μs
35 μs

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UT01VS50D arduino
Figure 9. 8-pin Dual-In-Line Flatpack
11

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