M5295AL/AP/AFP

REJ03D0780-0200 Rev.2.00 Jun 15, 2007

Page 6 of 12

• Pin (1) (WD pin) input requirements

(1) Connect capacitor between WD pin and voltage input. (refer to section 3)

1

1.1

< f

234

t

0.5

ms

C = 104

1ms

50

µs

C = 103

100

µs

Discharge Voltage x(V)

Figure 4

3. Relationship between input pulse width and input capacitance Cin

When input to pin (1) is 1.5 V or more, TC pin discharges electricity. Determine pulse width and input capacitance

Cin with reference to the diagram shown in figure 5.

Vin

1.5

30k

Cin

20k

4V

WD

(1)

Vin

Vin

1.5V

2V

t

t

t

t

TC

(2)

RST1

(3)

Figure 5