The HD74AC164P is an 8-bit serial-in, parallel-out shift register manufactured by Renesas Electronics America. It belongs to the Advanced CMOS (AC) logic family, which offers high speed and low power consumption compared to earlier TTL logic families.

Applications

• Serial-to-parallel data conversion
• Display drivers
• Line receivers
• Remote control systems
• Digital communication systems

Features

• 8-bit serial-in, parallel-out shift register
• High-speed operation (typically 50 MHz)
• Low power consumption
• Wide operating voltage range (2V to 6V)
• Fanout of 15 LSTTL loads
• Direct clear input

Benefits

• Converts serial data to parallel format for easier processing
• High speed enables use in demanding applications
• Low power consumption reduces system power requirements
• Wide operating voltage range simplifies system design
• Direct clear input allows for easy reset of the register

Technical Specifications

The HD74AC164P features eight D-type flip-flops connected in a serial shift register configuration. Data is entered serially through the A and B inputs. The clock input (CLK) shifts the data one bit position on each rising edge. The output of each flip-flop (QA through QH) is available for parallel access. The clear input (CLR) asynchronously resets all flip-flops to the low state when asserted. The propagation delay from clock to output is typically in the nanosecond range, allowing for high-speed operation. The device operates over a wide temperature range, typically -40°C to +85°C. The specific operating voltage range, input/output voltage levels, and timing characteristics are detailed in the Renesas datasheet for this part number. The device is typically packaged in a DIP (Dual In-line Package).