M62050 データシートの表示（PDF） - Renesas Electronics

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M62050

3 V Supply System Reset with Watchdog Timer

Renesas Electronics 

M62050P/FP

• Pin (1) (WD pin) input requirements

(1) Input cycle: tWD or less (discharge should start before voltage at WD pin reaches 2.4 V.)

1

<f

1.1 ⋅ C ⋅ R1

(2) Input pulse width tWDIN: t2 or less

C = 104

1ms t

C = 103

100µs

t1

VCC = 3V

50µs

0.5

ms

R1 = 10kΩ

t2

1.2 1.7 2.4

Discharge Voltage x(V)

Figure 5

3. VCC detection voltage adjustment

The detection voltage 2 (VTH2) can be set as shown in Table 1 by connecting ADJ pin with opening or VCC.

Table 1 Detection Voltage 2 (ADJ pin)

Detection Voltage 2

VTH2(H)

VTH2(L)

at Opening (V)

2.55

2.50

at VCC (V)

2.35

2.30

6

6.5kΩ

8

35.2kΩ

RL

40kΩ

+

–

7

1.25V

4

Figure 6

REJ03D0786-0200 Rev.2.00 Jun 15, 2007

Page 7 of 11

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