4

FN2867.9

August 24, 2006

Functional Diagram

Reset Voltage

0.4

1.0

0.2

1.2

V

Reset Current

10

50

nA

Discharge Leakage

10

50

nA

Output Voltage

0.4

1.0

1.25

V

0.2

0.4

0.5

V

14.3

14.6

14.2

V

4.0

4.3

3.8

V

Discharge Output Voltage

0.2

0.4

0.6

V

0.4

V

Supply Voltage (Note 3)

Functional Operation

2.0

18.0

3.0

16.0

V

Output Rise Time (Note 3)

75

ns

Output Fall Time (Note 3)

75

ns

Oscillator Frequency

(Note 3)

C = 200pF

1MHz

NOTES:

3. These parameters are based upon characterization data and are not tested.

4. Applies only to military temperature range product (M suffix).

Electrical Specifications

Applies to ICM7555 and ICM7556, unless otherwise specified (Continued)

PARAMETER

SYMBOL

TEST CONDITIONS

(NOTE 4)

-55°C TO

+125°C

UNITS

MIN

TYP

MAX

MIN

TYP

MAX

+

-

THRESHOLD

CONTROL

VOLTAGE

6

5

3

1

+

-

TRIGGER

2

COMPARATOR

R

GND

B

COMPARATOR

A

R

8

OUTPUT

7

1

n

DISCHARGE

OUTPUT

DRIVERS

FLIP-FLOP

RESET

4

R

NOTE:

This functional diagram reduces the circuitry down to its simplest equivalent components. Tie down unused inputs.

TRUTH TABLE

THRESHOLD VOLTAGE

TRIGGER VOLTAGE

RESET

OUTPUT

DISCHARGE SWITCH

Don’t Care

Don’t Care

Low

Low

On

High

Low

On

High

Stable

Stable

Don’t Care

High

High

Off

NOTE: RESET will dominate all other inputs: TRIGGER will dominate over THRESHOLD.

ICM7555, ICM7556