The 74ACT367 is a high-speed, advanced CMOS tri-state hex buffer manufactured by Texas Instruments (TI), formerly National Semiconductor. It provides six independent buffer circuits, each with a tri-state output enable control. This allows the outputs to be switched between logic high, logic low, and a high-impedance state, making it suitable for bus driving and memory addressing applications.

Applications

• Memory address drivers
• Clock drivers
• Line drivers
• Bus transceivers
• Logic level shifters

Features

• High-speed operation: tpd = 4.5 ns (typical)
• Low power consumption: ICC = 8 μA (maximum)
• Balanced propagation delays
• Fanout of 15 LSTTL loads
• Wide operating voltage range: 4.5V to 5.5V
• Tri-state outputs
• Available in various packages: DIP, SOIC, TSSOP

Benefits

• Improved system performance: The high-speed operation reduces propagation delays, improving overall system speed.
• Reduced power consumption: Low power consumption helps minimize heat dissipation and extends battery life in portable devices.
• Simplified bus interfacing: Tri-state outputs allow for easy interfacing with shared buses, preventing bus contention.
• Increased fanout capability: High fanout allows the buffer to drive a large number of loads without signal degradation.
• Versatile applications: Suitable for a wide range of buffering, driving, and logic-level shifting applications.

Additional Details

The 74ACT367 is commonly used in digital systems where high-speed buffering and tri-state output control are required. Its balanced propagation delays ensure that signals are propagated with minimal skew, improving timing accuracy. The device is available in various packages to accommodate different board layouts and assembly techniques.

Absolute Maximum Ratings:

• Supply Voltage (VCC): -0.5V to +7.0V
• DC Input Voltage (VI): -0.5V to VCC + 0.5V
• DC Output Voltage (VO): -0.5V to VCC + 0.5V
• DC Output Current (IO): ±50 mA
• Storage Temperature (TSTG): -65°C to +150°C

Recommended Operating Conditions:

• Supply Voltage (VCC): 4.5V to 5.5V
• Operating Temperature (TA): -40°C to +85°C

The 74ACT367's tri-state outputs are controlled by an output enable (OE) input. When OE is low, the outputs are enabled, and the buffer passes the input signal to the output. When OE is high, the outputs are disabled and enter a high-impedance state, effectively disconnecting the buffer from the bus. This allows multiple devices to share the same bus lines without causing conflicts.