The 74AC521PC is an 8-bit Identity Comparator manufactured by Fairchild Semiconductor (now ON Semiconductor). This device compares two 8-bit words and provides a high or low output indicating whether they are identical. It belongs to the 74AC family of advanced CMOS logic devices, offering high speed and low power consumption.

Applications

• Address decoding
• Memory comparisons
• Data integrity verification
• Parity checking
• Industrial control systems

Features

• 8-bit comparison
• High-speed operation
• Low power consumption
• Outputs can drive 15 LSTTL loads
• Wide operating voltage range

Benefits

• Fast and accurate data comparison
• Energy-efficient operation
• Simple implementation in digital circuits
• Versatile for various logic applications

Specifications

The 74AC521PC operates from a supply voltage of 2V to 6V. It has a typical propagation delay of around 6 ns. The output is an active-low equality output, meaning it goes low when the two input words are identical. The device is housed in a 20-pin DIP (Dual Inline Package). The operating temperature range is typically -40°C to +85°C. It provides a direct comparison of two 8-bit words without requiring any external components for basic operation. Refer to the datasheet for detailed timing diagrams and electrical characteristics.