d 

High Speed CMOS Logic – 74HC112

 

 

Rev 1.0

24/11/17

Pad Layout and Functions

 

 

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1500µm (59.06 mils)

0,0

COORDINATES (mm)

PAD

FUNCTION

X

Y

1

1CLK

0.125

0.345

2

1K

0.135

0.125

3

1J

0.585

0.135

4

1PRE

0.755

0.135

5

1Q

1.025

0.135

6

1Q

1.225

0.135

7

2Q

1.245

0.54

8

GND

1.245

0.735

9

2Q

1.26

0.995

10

2PRE

1.26

1.165

11

2J

1.25

1.47

12

2K

0.86

1.48

13

2CLK

0.48

1.48

14

2CLR

0.125

1.47

15

1CLR

0.125

0.855

16

0.125

0.615

9

8

7

6

5

4

3

2

1

16

15

14

13

12

10

11

DIE ID

Truth Table

Logic Diagram

INPUTS

OUTPUTS

PRE

CLR

CLK

J

K

Q

Q

L

H

X

X

X

H

L

H

L

X

X

X

L

H

L

L

X

X

X

H*

H*

H

H

↓

L

L

NO CHANGE

H

H

↓

H

L

H

L

H

H

↓

L

H

L

H

H

H

↓

H

H

TOGGLE

H

H

H

X

X

NO CHANGE

H = High level (steady state), L = Low level (steady state)

X = Don’t care, ↓ = High-to-Low transition

* Output states unpredictable if both PRE and CLR go High

simultaneously after both being low at the same time.

x1 Flip-Flop

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