Standard Products
UT01VS50L Voltage Supervisor
Data Sheet
July 28, 2014
www.aeroflex.com/voltsupv
FEATURES
INTRODUCTION
4.75V to 5.5V Operating voltage range
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.
Power supply (V ) monitor set by the internal voltage
DD
reference at 4.65V
Precision Input Voltage Monitor using an internal 1.25V
voltage reference
Watchdog Timer Circuit monitoring activity on WDI input
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
- Nominal timeout 1.6s
RESET output responding to the V monitor and the
DD
manual reset input MR
- Nominal RESET pulse width 200ms
of a supply voltage other than V
.
DD
RESET level valid for V >=1.2V
DD
o
o
The UT01VS50L includes an active low manual reset with an
internal pull-up.
Operating Temperature Range -55 C to +125 C
Low Power, Typical 400uA
Operational environment:
- Total dose: 300 krad(Si)
APPLICATIONS
2
o
- SEL Immune: <110 MeV-cm /mg @125 C
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
2
- SET Immune: <80 MeV-cm /mg
Packaging options:
- 8-lead dual-in-line flatpack
Standard Microelectronics Drawing (SMD) 5962-11213
- QML Q and V
WDO
RESET &
DIGITAL CONTROL
RESET
MR
+
VDD
-
WDI TIMER
4.65 V
GND
PFI
VREF
WDI TRANSITION
DETECTOR
OSC
1.25 V
WDI
PFO
-
+
Figure 1. UT01VS50L Functional Block Diagram
1