SN7420
Dual 4-Input Positive-NAND Gate (Texas Instruments)
SN74221
DUAL MONOSTABLE MULTIVIBRATORS (Texas Instruments)
SN7423
Dual 4-Input NOR Gate (Texas Instruments)
SN74251
Data Selectors/Multiplexers (Texas Instruments)
SN74259
8-BIT ADDRESSABLE LATCHES (Texas Instruments)
SN7426
High-Voltage Interface Positive-NAND Gates (Texas Instruments)
SN7427
Triple 3-Input Positive-NOR Gates (Texas Instruments)
SN74273
OCTAL D-TYPE FLIP-FLOP (Texas Instruments)
SN74279
QUADRUPLE S-R LATCHES (Texas Instruments)
SN7428
QUADRUPLE 2-INPUT POSITIVE-NOR BUFFER (Texas Instruments)