TC74AC161FN datasheet(2/15 Pages) TOSHIBA

Il numero della parte	TC74AC161FN

Spiegazioni elettronici	CMOS Digital Integrated Circuit Silicon Monolithic

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Produttore elettronici	TOSHIBA [Toshiba Semiconductor]

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TC74AC161,163P/F/FN/FT

2007-10-01

2

Pin Assignment

IEC Logic Symbol

Truth Table (Note)

Inputs

Outputs

CLR

(161)

CLR

(163)

LOAD

ENP

ENT

CK

(161)

CK

(163)

QA

QB

QC

QD

Function

L

X

L

Reset to “0”

H

L

X

A

B

C

D

Preset Data

H

X

L

No Change

No Count

H

L

X

No Change

No Count

H

Count Up

Count

H

X

No Change

No Count

Note:

X: Don’t care

A, B, C, D: Logic level of data inputs

Carry: Carry = ENT·QA·QB·QC·QD

VCC

16

Carry Output

QA

QB

15

14

13

12

11

10

CLR

1

2

3

4

5

6

7

B

C

D

ENP

GND

QC

8

LOAD

9

QD

ENT

(top view)

CK

A

(9)

(1)

(10)

(2)

(7)

ENP

1, 5D

(1)

CK

(3)

(4)

B

A

(15)

(14)

QB

(13)

QA

QC

CT = 0

M1

LOAD

CLR

C

(5)

(6)

D

(12)

QD

(11)

Carry Output

ENT

TC74AC161

CTRDIV 16

M2

G3

G4

C5/2, 3, 4+

3CT = 15

(2)

(4)

(8)

(9)

(1)

(10)

(2)

(7)

ENP

1, 5D

(1)

CK

(3)

(4)

B

A

(15)

(14)

QB

(13)

QA

QC

5CT = 0

M1

LOAD

CLR

C

(5)

(6)

D

(12)

QD

(11)

Carry Output

ENT

TC74AC163

CTRDIV 16

M2

G3

G4

C5/2, 3, 4+

3CT = 15

(2)

(4)

(8)

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