74C221   데이터시트

Fairchild Semiconductor

Dual Monostable Multivibrator

Fairchild Semiconductor

Quad 2-Input NAND Gate . Quad 2-Input NOR Gate . Hex Inverter

Fairchild Semiconductor

Quad 2-Input NAND Gate . Quad 2-Input NOR Gate . Hex Inverter

Rochester Electronics

64-Bit TRI-STATE Random Access Read/Write Memory

Fairchild Semiconductor

Quad 2-Input NAND Gate . Quad 2-Input NOR Gate . Hex Inverter

Fairchild Semiconductor

Hex Schmitt Trigger

Fairchild Semiconductor

4-Digit Expandable Segment Display Controller

Fairchild Semiconductor

4-Digit Counters with Multiplexed 7-Segment Output Drivers

National ->Texas Instruments

16-Key Encoder / 20-Key Encoder

Fairchild Semiconductor

4-Digit Counters with Multiplexed 7-Segment Output Drivers