Description:

Lot of 5x SN74LS244J octal bus buffer / line driver logic ICs in 20-pin DIP package, marked Motorola and “KOREA”. The 74LS244 is a classic non-inverting tri-state buffer used for driving data/address buses, isolating signals, and improving fan-out in 5V TTL systems. Common in vintage computers, arcade boards, industrial controllers, and instrumentation where reliable bus driving and isolation is needed. Parts are exactly as shown in the photos.

Modern uses:

- Repair/restoration of retro computers, arcade PCBs, and other 5V TTL bus systems

- Bus buffering/isolation for legacy parallel data lines (tri-state control)

- General-purpose signal buffering to improve fan-out and reduce loading issues

Compatibility note:

Verify the exact part number (SN74LS244J) and 20-pin DIP pinout before installation. Confirm your system is 5V TTL (LS) compatible and that the enable pins (/OE) polarity matches your circuit. Outputs are tri-state totem-pole—avoid bus contention by ensuring only one device drives the bus at a time. Vintage/surplus parts—test before critical use.