74LVT2952D 데이터 시트보기 (PDF) - Philips Electronics

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74LVT2952D

3.3V LVT octal registered transceiver (3-State)

Philips Electronics 

Philips Semiconductors

3.3V Octal registered transceiver (3-State)

Product specification

74LVT2952

LOGIC SYMBOL

16 17 18 19 20 21 22 23

A0 A1 A2 A3 A4 A5 A6 A7

10

CPAB

11

CEAB

OEBA

15

14

CPBA

OEAB

9

13

CEBA

B0 B1 B2 B3 B4 B5 B6 B7

8765 432 1

SV00037

LOGIC DIAGRAM

CEAB11

LOGIC SYMBOL (IEEE/IEC)

15

EN3 (BA)

13

G1

14

1C5

9

EN4 (AB)

11

G2

10

2C6

16

3

1 5D

8

6D 1 4

17

7

18

6

19

5

20

4

21

3

22

2

23

1

SV00038

CPAB10

OEAB 9

A0 16

CE Q

D CP

DETAIL A

Q CE

CP D

8 B0

A1 17

A2 18

A3 19

A4 20

A5 21

A6 22

A7 23

13

CEBA

DETAIL A X 7

7 B1

6 B2

5 B3

4 B4

3 B5

2 B6

1 B7

CPBA 14

OEBA 15

FUNCTION TABLE for Register An or Bn

INPUTS

An or Bn CPXX

INTERNAL

CEXX

Q

OPERATING

MODE

X

X

H

NC

Hold data

L

↑

L

H

↑

L

L

H

Load data

H = High voltage level

L = Low voltage level

↑ = Low-to-High transition

X = Don’t care

XX = AB or BA

NC= No change

SV00039

FUNCTION TABLE for Output Enable

INPUTS

OEXX

INTERNAL

Q

An or Bn

OUTPUTS

OPERATING

MODE

H

X

Z

Disable outputs

L

L

L

H

L

H

Enable outputs

H = High voltage level

L = Low voltage level

X = Don’t care

XX = AB or BA

Z = High impedance ”off” state

1998 Feb 19

3

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