MB3761 データシートの表示（PDF） - Fujitsu

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MB3761

ASSP VOLTAGE DETECTOR

Fujitsu 

s TYPICAL CHARACTERISTICS

MB3761

VO (V) 6

Figure 14. DC Characteristics

4

2

0

0

1

2

3

4

5

6

VCC (V)

Figure 15. Response Characteristics

5

VCC (V)

0

4.4

VO (V)

0

VCCL

VCCH

VCC

VO

tRST

∼ 30 ms

• Voltage Threshold Levels (VCCL and VCCH) and

Hysteresis Width can be changed by the resistors

(R1 through R4).

R1 + R2 + R3

VCCL =

R3

VTH

R1 (R2 + R3 )

VCCH = VCCL +

R3 R4

VTH

• Power-On Reset Time is provided by the following

approximate equation:

{ } VTH

R1

tRST = -C1 R4 • In 1 - VCC (1 + R2 + R3 )

• The recommended value of hFE of the external

transistor is from 50 to 200.

• In the case of an instant power fail,

the remaining charge in C1 effects tRST.

• If necessary, the reversed output is provided

on HYS terminal

9

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