MC74VHC259DTG datasheet(2/8 Pages) ONSEMI

Part #	MC74VHC259DTG

Description	8-Bit Addressable Latch/1-of-8 Decoder CMOS Logic Level Shifter

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Manufacturer	ONSEMI [ON Semiconductor]

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MC74VHC259

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LATCH SELECTION TABLE

Address Inputs

Latch

Addressed

L

H

L

H

L

H

CB

A

L

H

L

H

L

H

L

H

L

H

L

Q0

Q1

Q2

Q3

Q4

Q5

Q6

Q7

4

5

6

7

8

10

11

12

15

14

13

3

2

1

A0

A1

A2

2

1

4

BIN/OCT

1

0

2

4

3

5

6

7

EN

A0

A1

A2

0

2

DMUX

1

0

2

4

3

5

6

7

G

0

7

ID

R

Q7

Q6

Q5

Q4

Q3

Q2

Q1

Q0

15

14

13

3

2

1

EN

ID

R

4

5

6

7

8

10

11

12

Q7

Q6

Q5

Q4

Q3

Q2

Q1

Q0

Q7

4

3

2

1

A0

A1

A2

NONINVERTING

OUTPUTS

ADDRESS

INPUTS

Figure 2. Logic Diagram

DATA IN

13

15

14

RESET

ENABLE

5

6

7

9

10

11

12

Q6

Q5

Q4

Q3

Q2

Q1

Q0

PIN 16 = VCC

PIN 8 = GND

Figure 3. IEC Logic Symbol

MODE SELECTION TABLE

Enable

Reset

Mode

L

H

L

HL

H

L

H

Addressable Latch

Memory

8−Line Demultiplexer

Reset

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