NE56604-42D データシートの表示（PDF） - Philips Electronics

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NE56604-42D

System reset with built-in Watchdog timer

Philips Electronics 

Philips Semiconductors

System reset with built-in Watchdog timer

Product data

NE56604-42

R

100 pF

2.2 kΩ

VCC

S1

8

7

6

5

CRT

RESET VS RCT VCC

CRT1

AC

B

CRT

CRT4

0.1 µF

CT RESET CLK GND

1

2

3

4

CRT

CRT2

20pF

R

10 kΩ

CRT

S2

AC

B

VCLK

CRT3

VCCA

VCLKA

SL01285

Figure 27. Test Circuit 2 (AC parameters).

Table 2. Switch and power supply settings, AC parameters

Parameter

VCC pulse width for

detection (Note 1)

Symbol S1

tP1

C

S2

VCCA

C

5.0 V

t1

4.0 V

VCC

–

1.4 V

0V

VCLKA

t2

t3

Clock input pulse width

tCLKW

A

C

(Note 2)

Clock input cycle

(Note 3)

tCLK

A

C

–

5.0 V 1.4 V

t2

0V

t2

–

5.0 V 1.4 V

t2

0V

t3

Watchdog monitoring

tWDM

A

A

–

5.0 V

–

time

Watchdog reset time

tWDR

A

A

–

5.0 V

–

Power-on reset delay

tPR

B to A A

–

5.0 V

–

time

RESET, RESET

tPD1

C

B

5.0 V

–

–

propagation delay time

4.0 V

tPD2

C

B

5.0 V

–

–

4.0 V

RESET, RESET rise time

tR1

A

A

–

5.0 V

–

tR2

A

A

–

5.0 V

–

RESET, RESET fall time

tF1

A

A

–

5.0 V

–

tF2

A

A

–

5.0 V

–

NOTES:

1. t1 = 8.0 µs.

2. t2 = 3.0 µs.

3. t3 = 20 µs.

VCLK

–

CRT

1, 2, 3

–

1, 2, 3

–

1, 2, 3

5.0 V 1, 2, 3

5.0 V

5.0 V

1, 2, 3

1, 2, 3

0V

1, 2

0V

2, 3

5.0 V

1

5.0 V

3

5.0 V

1

5.0 V

3

2003 Oct 15

14

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