74LS390   데이터시트

Fairchild Semiconductor

Dual 4-Bit Decade Counter

Motorola => Freescale

DUAL DECADE COUNTER; DUAL 4-STAGE BINARY COUNTER LOW POWER SCHOTTKY

Fairchild Semiconductor

Quad 2-Input OR Gate

Motorola => Freescale

QUAD 2-INPUT NAND BUFFER

Fairchild Semiconductor

8-Input NAND Gate

Hitachi -> Renesas Electronics

Quadruple 2-input Positive NAND Buffers(with Open Collector Outputs)

ON Semiconductor

Octal D flip-Flop with Enable

Fairchild Semiconductor

BCD TO 7-SEGMENT DECODER / DRIVER

Motorola => Freescale

DUAL DECADE COUNTER; DUAL 4-STAGE BINARY COUNTER LOW POWER SCHOTTKY

Motorola => Freescale

3-STATE HEX BUFFERS LOW POWER SCHOTTKY

Renesas Electronics

Octal D-type Edge-triggered Flip-Flips(with three-state outputs)