74LS85 – 4-bit Magnitude Comparator [Original]

74LS85 4-bit Magnitude Comparator IC for Binary & BCD Codes

The 74LS85 is a versatile 4-bit magnitude comparator integrated circuit. It efficiently performs comparisons of both straight binary and BCD codes. This IC provides three fully-decoded decisions: A > B, A < B, and A = B, available at its outputs. A key advantage is its expandability, allowing comparison of words with greater lengths. Multiple 74LS85 comparators can be easily cascaded without requiring external gates. This cascading feature is designed with a minimal two-gate-level delay. This ensures reduced overall comparison times, even for very long digital words. It's an essential component for digital logic designs requiring precise data comparison.

Specifications:

• Logic Family: LS TTL
• Number of Bits: 4-bit
• Operating Voltage (Vcc): 4.75V to 5.25V
• Operating Temperature Range: 0°C to 70°C
• Outputs: A>B, A
• Cascading Capability: Yes, without external gates
• Input Compatibility: TTL
• Output Compatibility: TTL
• Package Type: DIP-16 (Typical)

Key features and benefits:

• Compares 4-bit binary or BCD codes
• Provides A>B, A
• Cascadable for comparing words of any length
• No external gates required for cascading
• Low two-gate-level delay for fast comparisons
• Operates up to 70°C
• Utilizes standard TTL switching voltages

Applications:

• Digital control systems
• Data processing units
• Arithmetic logic units (ALUs)
• Microprocessor interfacing
• Sorting and ranking circuits
• Memory address decoding

Package Includes:

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