The HD74HCT244TELL is a high-speed CMOS octal buffer/line driver with non-inverting 3-state outputs manufactured by Renesas Electronics America. It is designed for interfacing between TTL and CMOS logic levels in mixed-logic systems. The device has two output enables, one for each group of four buffers. When an output enable is high, the corresponding outputs are in a high-impedance state.

Applications

• TTL to CMOS logic level conversion
• Memory address drivers
• Clock drivers
• Bus-oriented systems
• Data transmission

Features

• TTL Compatible Input Thresholds
• High Speed: Similar to LSTTL
• Low Power Dissipation: Characteristic of CMOS circuits
• Output Drive Capability: 15 LSTTL Loads
• 3-State Outputs
• Two Output Enables
• Wide Operating Voltage Range: 4.5V to 5.5V
• Temperature Range: -40°C to +85°C
• Package: SOP-20 (Small Outline Package)

Benefits

• Seamless interfacing between TTL and CMOS logic levels.
• High-speed data transmission and signal buffering.
• Reduced power consumption compared to TTL logic.
• Increased system flexibility with 3-state outputs for bus isolation.
• Easy integration into existing TTL systems.

Additional Details

The HD74HCT244TELL provides a propagation delay of approximately 14 ns. It is specifically designed to be compatible with TTL input logic levels, allowing it to directly interface with TTL circuits. The output drive capability is sufficient for driving up to 15 LSTTL loads. The device operates over a wide temperature range and is available in a SOP-20 package.