SN74LS193 データシートの表示（PDF） - ON Semiconductor

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SN74LS193

Presettable 4-Bit Binary Up/down Counter

ON Semiconductor 

PL 11

(LOAD)

CPU 5

(UP COUNT)

SN74LS193

STATE DIAGRAM

0

1

2

3

4

15

5

14

6

13

7

12

11

10

9

8

LOGIC EQUATIONS

FOR TERMINAL COUNT

TCU = Q0 ⋅ Q1⋅ Q2⋅ Q3 ⋅ CPU

TCD = Q0 ⋅ Q1 ⋅ Q2 ⋅ Q3 ⋅ CPD

COUNT UP

COUNT DOWN

LOGIC DIAGRAM

P0

P1

P2

P3

15

1

10

9

12 TCU

(CARRY

OUTPUT)

SD Q

T

CD Q

SD Q

T

CD Q

SD Q

T

CD Q

SD Q

T

CD Q

13 TCD

CPD 4

(DOWN

(BORROW

OUTPUT)

COUNT)

MR

14

(CLEAR)

3

2

6

7

Q0

Q1

Q2

Q3

VCC = PIN 16

GND = PIN 8

= PIN NUMBERS

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