74LS640, Octal Inverting Bus Transceiver, DIP-20

The 74LS640 is an octal inverting bus transceiver designed for asynchronous two-way communication between data buses. Depending on the logic level at the direction control (DIR) input, data can be transmitted from the A bus to the B bus or vice versa. The enable input (G) can disable the device, effectively isolating the buses. This transceiver is ideal for applications requiring bidirectional data flow with inversion and is compatible with standard TTL logic levels.

• Asynchronous Two-Way Communication – Facilitates data transmission between two buses without the need for synchronized clocks.
• Inverting Logic – Provides inverted data outputs, suitable for specific logic requirements.
• 3-State Outputs – Allows multiple devices to share the same data bus without interference.
• High Drive Capability – Capable of sinking up to 24 mA and sourcing up to 15 mA per output.
• Standard TTL Compatibility – Compatible with standard TTL logic levels, ensuring easy integration into existing systems.
• Robust 20-Pin DIP Package – Encased in a standard 20-pin Dual In-Line Package for straightforward PCB mounting.