74LS   데이터시트

ON Semiconductor

SYNCHRONOUS 4-BIT UP/DOWN COUNTER

Mitsumi

OCTAL BUFFER/LINE DRIVERS WITH 3-STATE OUTPUT(NONINVERTED)

Motorola => Freescale

4-BIT SHIFT REGISTER

Motorola => Freescale

SCHMITT TRIGGERS DUAL GATE/HEX INVERTER

Motorola => Freescale

QUAD 2-INPUT NAND BUFFER

Hitachi -> Renesas Electronics

Dual J-K Flip-Flops(with Clear)

Renesas Electronics

Hex Inverters / Hex Inverters (with Open Collector Outputs)

Hitachi -> Renesas Electronics

Triple 3-input Positive NOR Gates

Fairchild Semiconductor

Quad 2-Input OR Gate