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The 74FCT533PC is an octal transparent latch with 3-state outputs, manufactured by National Semiconductor (NS).

Specifications:

• Technology: FCT (Fast CMOS TTL-Compatible)
• Package: 20-pin PDIP (Plastic Dual In-Line Package)
• Logic Type: Octal D-Type Transparent Latch
• Output Type: 3-State (High-Impedance when disabled)
• Operating Voltage: 5V ±10%
• High-Speed Operation: Compatible with TTL levels
• Input/Output Compatibility: TTL and CMOS
• Latch Enable (LE) Control: Transparent when high, latched when low
• Output Enable (OE) Control: Active-low (enables outputs when low)
• Propagation Delay: Typically 5ns (varies with conditions)
• Operating Temperature Range: -40°C to +85°C

Descriptions:

• The 74FCT533PC features eight D-type latches with a common latch enable (LE) and output enable (OE).
• When LE is high, the outputs follow the inputs (transparent mode).
• When LE transitions low, the data is latched and held.
• The OE pin (active low) controls the 3-state outputs, allowing multiple devices to share a bus.

Features:

• High-Speed CMOS Technology: Ensures fast switching speeds.
• Low Power Consumption: Optimized for power-sensitive applications.
• 3-State Outputs: Supports bus-oriented systems.
• TTL-Compatible Inputs/Outputs: Ensures easy interfacing with TTL logic.
• Wide Operating Temperature Range: Suitable for industrial applications.

This device is commonly used in data buffering, bus interfacing, and memory address latching applications.