The MC74HC521N is an 8-bit Identity Comparator. This device compares two 8-bit words (A and B) and provides an output that indicates whether the two words are identical. It is suitable for applications such as memory address decoding, data comparison, and control systems.

Applications

• Memory address decoding
• Data comparison
• Control systems
• Parity checking
• Error detection
• Data validation

Features

• High Speed Operation: tPD = 18 ns (typ) at VCC = 5V
• Low Power Dissipation: ICC = 4 μA (max) at TA = 25°C
• High Noise Immunity: VNIH = VNIL = 30 % VCC
• Operating Voltage Range: 2V to 6V
• 8-Bit Identity Comparison
• Equality Output
• TTL Compatible Inputs

Benefits

• Fast comparison speed for real-time applications.
• Low power consumption for energy-efficient designs.
• Reliable operation in noisy environments.
• Simplified circuit design due to the integrated comparator function.
• Versatile use in a wide range of digital systems.
• Cost-effective solution for data comparison needs.

The MC74HC521N is an 8-bit identity comparator fabricated using silicon-gate CMOS technology. It compares two 8-bit words (A0-A7 and B0-B7) and asserts a high level on the equality output (A=B) when all corresponding bits are equal. The device operates from a supply voltage of 2V to 6V and is compatible with standard TTL logic levels. It is commonly available in a through-hole DIP package.