3

FIGURE 2. LOGIC DIAGRAM (1 MONO)

FUNCTIONAL TERMINAL CONNECTIONS

FUNCTION

TERMINAL NUMBER

GND TO

TERMINAL NUMBER

INPUT PULSE TO

TERMINAL NUMBER

OTHER

CONNECTIONS

Leading-Edge

Trigger/Retriggerable

3, 5

11, 13

4

12

Leading-Edge

Trigger/Non-Retriggerable

3

13

4

12

5-7

11-9

Trailing-Edge

Trigger/Retriggerable

313412

511

Trailing-Edge

Trigger/Non-Retriggerable

3

13

5

11

4-6

12-10

NOTES:

3. A retriggerable one-shot multivibrator has an output pulse width which is extended one full time period (T) after application of the last

trigger pulse.

4. A non-triggerable one-shot multivibrator has a time period (T) referenced from the application of the first trigger pulse.

FIGURE 3. INPUT PULSE TRAIN

FIGURE 4. RETRIGGERABLE MODE

PULSE WIDTH (A MODE)

FIGURE 5. NON-RETRIGGERABLE MODE

PULSE WIDTH

(A MODE)

D

CL

CL

Q

Q

R2

R1

FF

2(14)

1(15)

8

R

A

B

3(13)

4(12)

5(11)

HIGH Z

R1

R2

COMP II

-

+

6(10)

7(9)

Q

Q

16

T

T

CD54HC4538, CD74HC4538, CD74HCT4538