NCV301LSN16T1G View Datasheet(PDF) - ON Semiconductor

Part Name

Description

Manufacturer

NCV301LSN16T1G

Voltage Detector Series

ON Semiconductor 

NCP300, NCP301

OPERATING DESCRIPTION

The NCP300 and NCP301 series devices are second

generation ultra−low current voltage detectors. Figures 20

and 21 show a timing diagram and a typical application.

Initially consider that input voltage Vin is at a nominal level

and it is greater than the voltage detector upper threshold

(VDET+), and the reset output (Pin 1) 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 Vin becomes

significantly deficient, it will fall below the lower detector

threshold (VDET−). 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, Vin will again return to its nominal level

and become greater than the VDET+. The voltage detector

has built−in hysteresis to prevent erratic reset operation as

the comparator threshold is crossed.

Although these device series are specifically designed for

use as reset controllers in portable microprocessor based

systems, they offer a cost−effective solution in numerous

applications where precise voltage monitoring is required.

Figure 25 through Figure 32 shows various application

examples.

Input Voltage, Pin 2

Vin

VDET+

VDET−

Reset Output (Active Low), Pin 1

Vin

VDET+

VDET−

0V

Reset Output (Active High), Pin 1

Vin

VDET+

VDET−

0V

Figure 21. Timing Waveforms

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