2

PS2084B

01/13/97

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PI74FCT191T

(25

Ω

Ω

Ω

Ω

Ω SERIES) PI74FCT2191T

4-BIT BINARY COUNTERS

Product Pin Description

Product Pin Configurations

(All Pins Top View)

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

16-Pin

Q16

S16

Notes:

1. H = High Voltage Level

L= Low Voltage Level

X = Don’t Care

Z= High Impedance

D1

Q1

Q0

CE

U/D

Q2

Q3

GND

VCC

D0

CP

RC

TC

PL

D2

D3

e

m

a

N

n

i

PO

/

In

o

it

p

i

r

c

s

e

D

0

D

-

3

DI

st

u

p

n

I

a

t

a

D

0

Q

-

3

QO

st

u

p

t

u

O

a

t

a

D

L

PI

d

a

o

l

e

r

P

D

/

UI

t

c

el

e

S

n

w

o

D

/

p

U

E

CI

el

b

a

n

E

t

n

u

o

C

P

CI

k

c

o

l

C

t

n

u

o

C

C

TO

t

n

u

o

C

l

a

n

i

m

r

e

T

C

RO

k

c

o

l

C

el

p

p

i

R

s

t

u

p

n

Is

t

u

p

t

u

O

L

PD

/

UP

CE

CI

D0

Q

-

3

QC

TC

Rn

o

it

c

n

u

F

L

XXX

0

D

-

3

D0

D

-

3

DX

X

a

t

a

D

d

a

o

L

HL

↑

LX

1

+

QL

H

p

U

t

n

u

o

C

HH

↑

LX

1

-

QL

H

n

w

o

D

t

n

u

o

C

H

XXH

X

Q

XX

ti

b

i

h

n

I

t

n

u

o

C

HL

Η

LX

F

H

H

1

1

1

1

=

p

U

t

n

u

o

C

HL

LX

FH

1

1

1

1

=

p

U

t

n

u

o

C

H

L

XXX

E

-

0L

H

p

U

t

n

u

o

C

≠

1

1

1

1

HHH

L

X

0

H

H

0

0

0

0

=

n

w

o

D

t

n

u

o

C

HH

L

X

0

H

0

0

0

0

=

n

w

o

D

t

n

u

o

C

H

H

XXX

F

-

1L

H

n

w

o

D

t

n

u

o

C

≠

0

0

0

0