UD8973

Preliminary

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

6 of 6

www.unisonic.com.tw

QW-R140-006.a



TYPICAL APPLICATION CIRCUIT (Cont.)

A

B

C

B1

B2

B3

Y0

Y1

Y2

Y3

Y4

Y5

Y6

Y7

HA1

1

HB1

2

HC1

3

EN138L

4

HD1

5

HE2

6

15

HSEL1

14

HSEL2

13

HSEL3

12

HSEL4

11

HSEL5

10

HSEL6

9

HSEL7

7

HSEL8

D162 U74HC138

A

B

C

E1

E2

E3

Y0

Y1

Y2

Y3

Y4

Y5

Y6

Y7

HA1

1

HB1

2

HC1

3

EN138L

4

HD2

5

HE2

6

15

HSEL9

14

HSEL10

13

HSEL11

12

HSEL12

11

HSEL13

10

HSEL14

9

HSEL15

7

HSEL16

D163 U74HC138

7

HD1

1

HE1

3

GND

5

01

9

02

11

03

13

14

2

HD2

4

HE2

6

01

8

02

10

03

12

VCC

D161 U74HC04

GND

1A

2A

3A

4A

5A

6A

VCC

1Y

2Y

3Y

4Y

5Y

6Y

GND

A

B

C

E1

E2

E3

Y0

Y1

Y2

Y3

Y4

Y5

Y6

Y7

HA1

1

HB1

2

HC1

3

EN138L

4

HD1

5

HE1

6

15

HSEL17

14

HSEL18

13

HSEL19

12

HSEL20

11

HSEL21

10

HSEL22

9

HSEL23

7

HSEL24

D164 U74HC138

A

B

C

E1

E2

E3

Y0

Y1

Y2

Y3

Y4

Y5

Y6

Y7

HA1

1

HB1

2

HC1

3

EN138L

4

HD2

5

HE1

6

15

HSEL25

14

HSEL26

13

HSEL27

12

HSEL28

11

HSEL29

10

HSEL30

9

HSEL31

7

HSEL32

D165 U74HC138

(3) 32 Bits U74HC138 Connection

1. EN138L can be connected to U74HC138 outputs or ground.

2. All above only describe connections of signal A, B, C, D and E. U74HC138’s and other devices’ decoupling

Note

UTC assumes no responsibility for equipment failures that result from using products at values that

exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or

other parameters) listed in products specifications of any and all UTC products described or contained

herein. UTC products are not designed for use in life support appliances, devices or systems where

malfunction of these products can be reasonably expected to result in personal injury. Reproduction in

whole or in part is prohibited without the prior written consent of the copyright owner. The information

presented in this document does not form part of any quotation or contract, is believed to be accurate

and reliable and may be changed without notice.