7493 データシートの表示（PDF） - NTE Electronics

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7493

Integrated Circuit TTL − 4−Bit Binary Counter

NTE Electronics 

Count Sequence (NOTE):

Count

Outputs

QD QC QB QA

0

LLLL

1

L L LH

2

L LHL

3

L LHH

4

LHL L

5

LHLH

6

L HH L

7

L HHH

8

HL L L

9

HL LH

10

HLHL

11

H L HH

12

HHL L

13

HH L H

14

HHH L

15

HHHH

H = HIGH Voltage Level

L = LOW Voltage Level

X = Irrelevant

NOTE: Output QA is connected to input CKB.

Reset/Count Function Table:

Reset Inputs

Outputs

R0(1)

H

R0(2)

H

QD QC QB QA

LLLL

L

X

Count

X

L

Count

H = HIGH Voltage Level

L = LOW Voltage Level

X = Irrelevant

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