NCP303LSN09T1 ON Semiconductor, NCP303LSN09T1 Datasheet - Page 16

• Manufacturer Part Number: NCP303LSN09T1
• Description: IC VOLT DETECT OD 0.9V SOT23-5
• Manufacturer: ON Semiconductor
• Type: Simple Reset/Power-On Resetr

Specifications of NCP303LSN09T1

• Number Of Voltages Monitored: 1
• Output: Open Drain or Open Collector
• Reset: Active Low
• Reset Timeout: Adjustable/Selectable
• Voltage - Threshold: 0.9V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: TSOT-23-5, TSOT-5, TSOP-5
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

precision voltage detector that drives a time delay generator.
Figures 37 and 38 show a timing diagram and a typical
application. Initially consider that input voltage V
nominal level and it is greater than the voltage detector upper
threshold (V
will be at the same level as V
will be in the high state for active low devices, or in the low
state for active high devices. If there is a power interruption
and V
lower detector threshold (V
delay capacitor C
internal N−Channel MOSFET that connects to Pin 5. This
sequence of events causes the Reset output to be in the low
state for active low devices, or in the high state for active
high devices. After completion of the power interruption,
The NCP302 and NCP303 series devices consist of a
in
becomes significantly deficient, it will fall below the
Reset Output (Active High), Pin 1
Reset Output (Active Low), Pin 1
DET+
OPERATING DESCRIPTION
). The voltage at Pin 5 and capacitor C
D
will be immediately discharged by an
Input Voltage, Pin 2
Capacitor, Pin 5
in
DET−
, and the reset output (Pin 1)
) and the external time
0.675 V
Figure 37. Timing Waveforms
V
V
V
V
DET
DET−
DET−
DET−
0 V
0 V
V
V
V
V
in
in
in
in
in
in
+
http://onsemi.com
is at a
D
16
V
than the V
N−Channel MOSFET and allow pullup resistor R
external capacitor C
for releasing the reset signal. When the voltage at Pin 5
exceeds the inverter/buffer threshold, typically 0.675 V
the reset output will revert back to its original state. The reset
output time delay versus capacitance is shown in Figures 30
through 32. The voltage detector and inverter/buffer have
built−in hysteresis to prevent erratic reset operation.
use as reset controllers in portable microprocessor based
systems, they offer a cost−effective solution in numerous
applications where precise voltage monitoring and time
delay are required. Figures 38 through 46 show various
application examples.
in
Although these device series are specifically designed for
will again return to its nominal level and become greater
DET+
t
D2
. The voltage detector will turn off the
D
, thus creating a programmable delay
D
to charge
in
,