1G123
SINGLE RETRIGGERABLE MONOSTABLE MULTIVIBRATOR WITH SCHMITT-TRIGGER INPUTS
● Schmitt-Triggered Circuitry on A and B Inputs for Slow Input Transition Rates
● Edge Triggered From Active-High or Active-Low Gated Logic Inputs
● Retriggerable for Very Long Outputs Pulses, up to 100% Duty Cycle
● Overriding Clear Terminates Output Pulse
● Glitch-Free Power-Up Reset on Outputs
Logic Diagram
7
6
FUNCTION TABLE
R
C
/C
ext ext
1
2
INPUTS
OUTPUT
Q
A
B
ext
CLR
L
A
X
H
X
B
X
X
L
5
L
Q
(1)
X
L
(1)
L
X
3
CLR
R
H
H
↑
L
↓
L
↑
H
H
(1) These outputs are based on the
assumption that the indicated
steady-state conditions at the A
and B inputs have been set up
long enough to complete any
pulse started before the setup.
REQUIRED TIMING CIRCUIT
V
CC
R
C
R /C
ext ext
ELECTRICAL CHARACTERISTICS AND RECOMMENDED OPERATING CONDITIONS
LVC
3.3V
LVC
2.5V
LVC
1.8V
LVC
5V
PARAMETER
MAX or MIN
UNIT
C
ext
MAX
MAX
MAX
MAX
0.01
0.975
-32
-
-
0.28
-8
-
0.22
-4
mA
mA
mA
mA
I
CC
I
CC
I
OH
I
OL
Quiescent
0.65
-24
24
Active State
32
8
4
TIMING REQUIREMENTS
PARAMETER
LVC
5V
LVC
3.3V
LVC
2.5V
LVC
1.8V
MAX or MIM
MAX
MAX
2.5
2.5
3
3
4
4
8
8
CLR
t
w
IN
A or B trigger
UNIT : ns
SWITCHING CHARACTERISTICS
PARAMETER
LVC
5V
LVC
3.3V
LVC
2.5V
LVC
1.8V
INPUT
OUTPUT
MAX or MIN
8.2
8.2
6
t
t
t
t
t
t
12.5
12.5
8.6
18.5
18.5
12.5
12.5
17
57
57
PLH
PHL
PLH
PHL
PLH
PHL
A or B
CLR
Q
Q
Q
MAX
MAX
MAX
36.5
36.5
59
6
8.6
7.5
7.5
11.5
11.5
CLR trigger
17
59
UNIT : ns
109
PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters. See www.ti.com/sc/logic for the most current data sheets.
TI [ TEXAS INSTRUMENTS ]
