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PDF UT01VS50L Data sheet ( Hoja de datos )
| Número de pieza | UT01VS50L | |
| Descripción | Voltage Supervisor | |
| Fabricantes | Aeroflex Circuit Technology | |
| Logotipo |  |
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Standard Products
UT01VS50L 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 output responding to the VDD monitor and the
manual reset input MR
- Nominal RESET pulse width 200ms
RESET 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 UT01VS50L’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 UT01VS50L 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 UT01VS50L includes an active low manual reset with an
internal pull-up.
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 +
Figure 1. UT01VS50L Functional Block Diagram
1
WDO
RESET
WDI
PFO
1 page  
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, 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
VOL3
Digital output low
VDD=4.75V, IOL =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
IPFI4
Threshold detector input (PFI)
current
VDD=5.5V
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
3.5
0.8
2.0
0.4
VDD - 1.5
V
V
V
V
V
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 μA
15 μs
35 μs
5 Page 
VDD
Normal Operation
VDD < VDD_UND
VDD > VDD_OV
Table 1. Under Voltage Over Voltage Truth Table
PFO_UND PFO_OV RESET_UND RESET_OV
HIGH
LOW
HIGH
LOW
LOW
HIGH
HIGH
LOW
HIGH
HIGH
HIGH
LOW
RESET
HIGH
LOW
LOW
uP or ASIC Mode
Normal
Reset Asserted
Reset Asserted
11
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet UT01VS50L.PDF ] | |
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