NCP302HSN09T1G Просмотр технического описания (PDF) - ON Semiconductor

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Компоненты Описание

производитель

NCP302HSN09T1G

Voltage Detector Series with Programmable Delay

ON Semiconductor 

NCP302, NCP303

VDD

RH

2 Input

VDD

RL

5

NCP3013

1

CD

LSN27T1

Reset Output

Microprocessor

Reset

3 GN

GN

D

D

Figure 41. Microprocessor Reset Circuit with Additional Hysteresis

Comparator hysteresis can be increased with the addition of

resistor RH. The hysteresis equations have been simplified and

do not account for the change of input current Iin as Vin crosses

the comparator threshold. The internal resistance, Rin is simply

calculated using Iin = 0.26 mA at 2.6 V.

Vin Decreasing:

ǒ Ǔ Vth +

RH

Rin

)

1

ǒVDET*Ǔ

Vin Increasing:

ǒ Ǔ Vth +

RH

Rin ø RL

)

1

ǒVDET* ) VHYSǓ

VHYS = Vin Increasing − Vin Decreasing

Test Data

Vth Decreasing

(V)

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 2.70

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 2.70

2.70

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 2.70

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 2.70

2.70

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 2.70

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 2.70

2.70

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 2.70

Vth Increasing

(V)

2.84

2.87

2.88

2.91

2.90

2.94

2.98

2.70

3.04

3.15

VHYS RH RL

(V) (W) (kW)

0.135 0

−

0.17 100 10

0.19 100 6.8

0.21 100 4.3

0.20 220 10

0.24 220 6.8

0.28 220 4.3

0.27 470 10

0.34 470 6.8

0.35 470 4.3

5.0 V

100 k

C

2 Input

82 k

5

NCP3012

CD HLSN27T1

1

Reset Output

3 GN

D

C (mF)

0.01

0.1

1.0

Test Data

fOSC (kHz)

2590

490

52

Figure 42. Simple Clock Oscillator

IQ (mA)

21.77

21.97

22.07

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