Pin Assignments
121
125
MONOSTABLE MULTIVIBRATORS WITH SCHMITT-TRIGGER INPUTS
QUADRUPLE BUS BUFFER GATES
WITH 3-STATE OUTPUTS
positive logic:
Rext/
Y = A
V
NC
NC
Cext
Cext
Rint
NC
CC
V
CC
4C
4A
4Y
3C
3A
3Y
14 13 12 11 10
9
8
14 13 12 11 10
9
8
Q
Q
1
Q
2
NC
3
A1
4
A2
5
B
6
Q
7
GND
1
1C
2
1A
3
1Y
4
2C
5
2A
6
2Y
7
GND
NC-No internal connection
See page 280
See page 284
122
126
RETRIGGERABLE MONOSTABLE MULTIVIBRATORS
QUADRUPLE BUS BUFFER GATES
WITH 3-STATE OUTPUTS
positive logic:
Rext/
V
Cext
NC
Cext
NC
Rint
Q
Y = A
CC
14 13 12 11 10
9
8
V
CC
4C
4A
4Y
3C
3A
3Y
14 13 12 11 10
9
8
Q
Q
CLR
1
A1
2
A2
3
B1
4
B2
5
CLR
6
Q
7
GND
1
1C
2
1A
3
1Y
4
2C
5
2A
6
2Y
7
GND
NC-No internal connection
See page 281
See page 285
123
128
DUAL RETRIGGERABLE MONOSTABLE
SN54128...75-Ω LINE DRIVER
SN74128...50-Ω LINE DRIVER
positive logic:
MULTIVIBARATORS WITH SCHMITT-TRIGGER INPUTS
1R
1
ext
ext/
ext
Y = A + B
V
C
C
1Q
2Q
2CLR
2B
2A
CC
V
CC
4Y
4B
4A
3Y
3B
3A
16 15 14 13 12 11 10
9
14 13 12 11 10
9
8
CLR
Q
Q
Q
Q
CLR
1
1A
2
1B
3
1CLR
4
1Q
5
2Q
6
7
8
GND
1
1Y
2
1A
3
1B
4
2Y
5
2A
6
2B
7
GND
2
2R
ext/
ext
C
ext
C
See page 282
See page 286
124
132
DUAL VOLTAGE-CONTROLLED OSCILLATORS
QUADRUPLE POSITIVE-NAND GATES
WITH SCHMITT TRIGGER INPUTS
positive logic:
2C
ext
2
2G
2Y
V
CC
V
CC
RANGE
ENABLE OUTPUT GND
Y = A•B
V
CC
4B
4A
4Y
3B
3A
3Y
16 15 14 13 12 11 10
9
14 13 12 11 10
9
8
C
ext
RNG
Y
FREQ
CONT EN
FREQ EN
CONT
Y
RNG
C
ext
1
2
2
1
3
4
5
6
7
8
GND
1
1G
1Y
1
1A
2
1B
3
1Y
4
2A
5
2B
6
2Y
7
GND
RANGE
ENABLE OUTPUT
FREQUENCY
CONTROL
1C
ext
See page 283
See page 286
167
TI [ TEXAS INSTRUMENTS ]
