d 

CMOS Low Power Timer – LMC555

Rev 1.1

21/01/18

 

 

Pad Layout and Functions

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

COORDINATES

(mm)

PAD

FUNCTION

X

Y

1

GND 

1.084 

0.119 

2

TRIGGER 

1.084 

0.4015 

3

OUTPUT 

1.0735 

0.9545 

4

RESET 

0.845 

0.984 

5

CONTROL 

VOLTAGE 

0.3335 

0.984 

6

THRESHOLD 

0.116 

0.8995 

7

DISCHARGE 

0.116 

0.6965 

8

VDD 

0.1535 

0.116 

CHIP BACK POTENTIAL IS GND OR FLOAT

 

Truth Table

1300µm (51.18 mils)

0,0

8

1

2

3

5

6

4

7

DIE ID

THRESHOLD

TRIGGER

RESET

OUTPUT

DISCHARGE

X

X

L

L

ON

> 2/3·VDD

> 1/3·VDD

H

L

ON

< 2/3·VDD

> 1/3·VDD

H

STABLE

STABLE

X

< 1/3·VDD

H

H

OFF

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

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