LOGIC DIAGRAM

VCC1 = PIN 1

VCC2 = PIN 16

VEE = PIN 8

5

7

10

13

15

3

2

Q

Q

64

VEE

VCC

CEXT

E pos

EXTERNAL PULSE

WIDTH CONTROL

ENEG

TRIGGER

INPUT

HI–SPEED

INPUT

TRUTH TABLE

EPos ENeg

L

L

H

H

INPUT

OUTPUT

L

H

L

H

Triggers on both positive & negative input slopes

Triggers on positive input slope

Triggers on negative input slope

Trigger is disabled

REXT

MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

3–172

REV 5

3/93

Monostable Multivibrator

The MC10198 is a retriggerable monostable multivibrator. Two enable inputs

permit triggering on any combination of positive or negative edges as shown in

the accompanying table. The trigger input is buffered by Schmitt triggers

making it insensitive to input rise and fall times.

The pulse width is controlled by an external capacitor and resistor. The

resistor sets a current which is the linear discharge rate of the capacitor. Also,

the pulse width can be controlled by an external current source or voltage (see

applications information).

For high–speed response with minimum delay, a hi–speed input is also

provided. This input bypasses the internal Schmitt triggers and the output

responds within 2 nanoseconds typically.

Output logic and threshold levels are standard MECL 10,000. Test

conditions are per Table 2. Each “Precondition” referred to in Table 2 is per the

sequence of Table 1.

PD = 415 mW typ/pkg (No Load)

tpd = 4.0 ns typ Trigger Inpt to Q

2.0 ns typ Hi–Speed Input to Q

Min Timing Pulse Width

PWQmin

10 ns typ1

Max Timing Pulse Width

PWQmax

>10 ms typ2

Min Trigger Pulse Width

PWT

2.0 ns typ

Min Hi–Speed

PWHS

3.0 ns typ

Trigger Pulse Width

Enable Setup Time

tset

1.0 ns typ

Enable Hold Time

thold

1.0 ns typ

1 CExt = 0 (Pin 4 open), RExt = 0

(Pin 6 to VEE)

2 CExt = 10 µF, RExt = 2.7 kΩ

MC10198

DIP

PIN ASSIGNMENT

VCC1

Q

Q

CEXT

EPOS

REXT

EXT.PULSE

WIDTH CONTROL

VEE

VCC2

HIGH–SPEED

INPUT

N/C

TRIGGER INPUT

N/C

N/C

ENEG

N/C

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

Pin assignment is for Dual–in–Line Package.

For PLCC pin assignment, see the Pin Conversion

Tables on page 6–11 of the Motorola MECL Data

Book (DL122/D).

L SUFFIX

CERAMIC PACKAGE

CASE 620–10

P SUFFIX

PLASTIC PACKAGE

CASE 648–08

FN SUFFIX

PLCC

CASE 775–02