NE56604-42D Просмотр технического описания (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

Parametric testing

DC and AC Characteristics can be tested using the circuits shown in

Figures 26 and 27. Associated switch and power supply settings are

shown in Table 1 and Table 2, respectively.

S2

ABC

1000 pF

S5

A IO1

8

7

6

5

RESET VS RCT VCC

S7

S1

V

S3

VO1

CRT

IRESET

CRT1

CT RESET CLK GND

1

2

3

4

A

A

A

ICT

IO2

ICLK

A

ICC

0.1 µF

VCC

VO0

S4

VCT A

C

V

S6

VO2

R

1.0 MΩ

B

IRESET

CRT

CRT2

VCLK

SL01284

Figure 26. Test Circuit 1 (DC parameters).

Table 1. DC characteristics Test Circuit 1 switch and power supply settings

Parameter

Power supply current

Reset threshold (LOW) (Note 1)

Reset threshold (HIGH) (Note 2)

Clock input threshold (Note 3)

Clock input current (HIGH)

Clock input current (LOW)

Reset output voltage (HIGH)

Reset output voltage (LOW)

Reset output sink current

(Note 4)

CT charge current 1

CT charge current 2

Minimum power supply for

RESET (Note 5)

Symbol S1 S2 S3 S4 S5 S6 S7

VCC

VCLK VCT IRESET IRESET Read

ICC

B OFF OFF B OFF ON ON 5.0 V

5.0 V 0 V

–

–

ICC

VSL

B OFF OFF B ON ON ON 5.0 to 4.0 V 3.0 V 3.0 V

–

–

VO1, CRT1

VSH

B OFF OFF B ON ON ON 4.0 to 5.0 V 3.0 V 3.0 V

–

–

VO1, CRT1

VTH

B OFF OFF B OFF ON ON 5.0 V 0 to 3.0 V 1.0 V

–

–

ICLK

ITH

B OFF OFF B OFF ON ON 5.0 V

5.0 V 0 V

–

–

ICLK

ITL

B OFF OFF B OFF ON ON 5.0 V

0V

0V

–

–

ICLK

VOH1

B OFF ON B ON ON ON

5.0 V

5.0 V 3.0 V –5.0 µA

–

VO1

VOH2

B ON OFF C ON ON ON

5.0 V

5.0 V 3.0 V

–

–5.0 µA

VO2

VOL1

B ON ON B ON ON ON

5.0 V

5.0 V 3.0 V 3.0 mA

–

VO1

VOL2

B ON ON B ON ON ON

5.0 V

5.0 V 3.0 V 10 mA

–

VO1

VOL3

B OFF OFF C ON ON ON

5.0 V

5.0 V 3.0 V

–

0.5 mA

VO2

VOL4

B OFF OFF C ON ON ON

5.0 V

5.0 V 3.0 V

–

1 mA

VO2

IOL1

C ON OFF B ON ON ON

5.0 V

5.0 V 3.0 V

–

–

IO1

IOL2

A OFF OFF B ON ON ON

5.0 V

5.0 V 3.0 V

–

–

IO2

ICT1

B OFF OFF B OFF OFF ON

5.0 V

–

1.0 V

–

–

ICT

ICT2

B OFF OFF B ON OFF ON

5.0 V

–

1.0 V

–

–

ICT

VCCL1 B OFF ON B ON ON ON 0 to 2.0 V

0V

0V

–

–

VO1, VCC

Minimum power supply for

RESET (Note 6)

VCCL2 B ON OFF A ON ON ON 0 to 2.0 V

0V

0V

–

–

VO2, VCC

NOTES:

1. Decrease VCC from 5.0 V to 4.0 V and note the VCC value when VO1 (observed on CRT1) transitions to an abrupt LOW state.

2. Increase VCC from 4.0 V to 5.0 V and note the VCC value when VO1 (observed on CRT1) transitions to an abrupt HIGH state.

3. Increase the Clock voltage (VCLK) from 0 V to 3.0 V and observe the value of VCLK when ICLK transitions to an abrupt increase.

4. Measured with VO0 = 1.0 V.

5. Increase VCC from 0 V to 2.0 V and note the VCC value when VO1 (observed on CRT1) transitions to an abrupt LOW state. The VO1 value

will initially track the VCC voltage increase until the internal circuit bias becomes active, at which time the VO1 value will return to a LOW state.

6. Increase VCC from 0 V to 2.0 V and note the VCC value when VO2 (observed on CRT2) starts to track the VCC voltage.

2003 Oct 15

13

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