The HD74HCT245FPEL is an octal bus transceiver with three-state outputs manufactured by Renesas Electronics America. This high-speed CMOS logic device is designed for bidirectional synchronous data communication between separate data buses. It features TTL-compatible inputs and CMOS outputs, facilitating easy interfacing between TTL and CMOS logic systems.

Applications

• Bidirectional data bus transceiver
• Memory interface
• Peripheral interface
• Data communication systems
• Microprocessor systems

Features

• TTL input level compatibility: VIH = 2.0 V (min.), VIL = 0.8 V (max.)
• High-speed operation: tpd = 17 ns (typ.) at VCC = 5V
• Low power dissipation: ICC = 4 μA (max.) at Ta = 25°C
• High output drive capability: 15 LSTTL loads
• Symmetrical output impedance: |IOH| = IOL = 6 mA (min.)
• Wide operating voltage range: VCC = 4.5 to 5.5 V
• Three-state outputs
• Direction control input for bidirectional data flow

Benefits

• Easy interface between TTL and CMOS logic levels.
• Improved system performance due to high-speed operation.
• Reduced power consumption for energy efficiency.
• High drive capability for robust signal transmission.
• Provides bus isolation when outputs are disabled.
• Facilitates bidirectional data transfer on a single bus.

Additional Details

The HD74HCT245FPEL is controlled by a direction control (DIR) input. When DIR is HIGH, data flows from A to B. When DIR is LOW, data flows from B to A. The output enable (OE) input, when HIGH, disables both A and B ports by placing them in a high-impedance state. This device is supplied in a 20-pin SOP package.

Absolute Maximum Ratings: Supply Voltage (VCC): -0.5 to +7.0 V, DC Input Voltage (VI): -0.5 to VCC + 0.5 V, DC Output Voltage (VO): -0.5 to VCC + 0.5 V, Operating Temperature (Topr): -40 to +85 °C.