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The UPD74HC564C is a high-speed CMOS octal D-type flip-flop with 3-state outputs, manufactured by NEC.

Key Specifications:

• Logic Family: 74HC (High-Speed CMOS)
• Function: Octal D-type flip-latch with 3-state outputs
• Number of Bits: 8
• Output Type: 3-state (high-impedance when disabled)
• Clock Trigger Type: Positive-edge triggered
• Operating Voltage: 2V to 6V (standard HC range)
• Propagation Delay: Typically 13ns at 5V
• Output Current: ±6mA (high/low)
• Input Capacitance: 3.5pF (typical)
• Operating Temperature Range: -40°C to +85°C
• Package: 20-pin DIP (Dual In-line Package)

Features:

• 3-State Outputs: Allows bus-oriented applications.
• High-Speed Operation: Suitable for high-performance digital systems.
• Low Power Consumption: CMOS technology ensures low static power dissipation.
• Wide Operating Voltage: Compatible with TTL levels when operating at 5V.
• Latch Enable (LE) Input: Controls data transfer to the outputs.
• Output Enable (OE) Input: Enables/disables the outputs (active low).

Applications:

• Data storage and transfer in digital systems
• Bus interfacing and buffering
• Register and latch applications

This part is now likely obsolete, as NEC's semiconductor division was acquired by Renesas Electronics. For current equivalents, consult Renesas or other manufacturers.