74LS192 查看數據表（PDF） - ON Semiconductor

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74LS192

PRESETTABLE BCD/DECADE UP/DOWN COUNTER PRESETTABLE 4-BIT BINARY UP/DOWN COUNTER

ON Semiconductor 

STATE DIAGRAMS

0

1

2

3

4

15

5

14

6

13

7

12

11

10

9

8

LS192

SN74LS192

Figure 2. LS192 LOGIC

EQUATIONS

FOR TERMINAL COUNT

Figure 1.

Figure 3.

TCU = Q0 ⋅ Q3 ⋅ CPU

TCD = Q0 ⋅ Q1 ⋅ Q2 ⋅ Q3 ⋅ CPD

Figure 4. LS193 LOGIC

EQUATIONS

FOR TERMINAL COUNT

Figure 5.

TCU = Q0 ⋅ Q1⋅ Q2⋅ Q3 ⋅ CPU

TCD = Q0 ⋅ Q1 ⋅ Q2 ⋅ Q3 ⋅ CPD

Count Up

Count Down

LOGIC DIAGRAMS

PL 11

(LOAD)

CPU 5

(UP COUNT)

P0

15

P1

1

P2

10

SD Q

T

CD Q

SD Q

T

CD Q

SD Q

T

CD Q

0

1

2

3

4

15

5

14

6

13

7

12

11

10

9

8

LS193

P3

9

12 TCU

(CARRY

OUTPUT)

SD Q

T

CD Q

CPD 4

(DOWN

COUNT)

MR

14

(CLEAR)

3

Q0

VCC = PIN 16

GND = PIN 8

= PIN NUMBERS

2

6

Q1

Q2

LS192

13 TCD

(BORROW

OUTPUT)

7

Q3

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