SN54LS290
DECADE COUNTER / 4-BIT BINARY COUNTER (Motorola Inc)
SN54LS293
DECADE COUNTER / 4-BIT BINARY COUNTER (Motorola)
SN54LS293
DECADE AND 4-BIT BINARY COUNTERS (Texas Instruments)
SN54LS297
DIGITAL PHASE-LOCKED-LOOP FILTER (Texas Instruments)
SN54LS298
QUAD 2-INPUT MULTIPLEXER (Motorola Inc)
SN54LS298
Quadruple 2-Input Multiplexers (Texas Instruments)
SN54LS299
8-BIT SHIFT/STORAGE REGISTER (Motorola Inc)
SN54LS299
8-BIT UNIVERSAL SHIFT/STORAGE REGISTERS (Texas Instruments)
SN54LS20
DUAL 4-INPUT NAND GATE (Motorola Inc)
SN54LS20
Dual 4-Input Positive-NAND Gate (Texas Instruments)