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CD4063BMS is a 4-bit magnitude comparator designed for use in computer and logic applications that require the comparison of two 4-bit words. This logic circuit determines whether one 4-bit word (Binary or BCD) is "less than", "equal to", or "greater than" a second 4-bit word.

The CD4063BMS has eight comparing inputs (A3, B3, through A0, B0), three outputs (A < B, A = B, A > B) and three cascading inputs (A < B, A = B, A > B) that permit systems designers to expand the comparator function to 8, 12, 16 . . . 4N bits. When a single CD4063BMS is used, the cascading inputs are connected as follows: (A < B) = low, (A = B) = high, (A > B) = low.

For words longer than 4 bits, CD4063BMS devices may be cascaded by connecting the outputs of the less significant comparator to the corresponding cascading inputs of the more significant comparator. Cascading inputs (A < B, A = B, and A > B) on the least significant comparator are connected to a low, a high, and a low level, respectively.

Key Features

• High Voltage Type (20V Rating)
• Expansion to 8, 12, 16 4N Bits by Cascading Units
• Medium Speed Operation
  • Compares Two 4-Bit Words in 250ns (Typ.) at 10V
• 100% Tested for Quiescent Current at 20V
• Standardized Symmetrical Output Characteristics
• 5V, 10V and 15V Parametric Ratings
• Maximum Input Current of 1µA at 18V Over Full Package Temperature Range; 100nA at 18V and +25°C
• Noise Margin (Full Package Temperature Range)
  • 1V at VDD = 5V
  • 2V at VDD = 10V
  • 2.5V at VDD = 15V
• Meets All Requirements of JEDEC Tentative Standard No. 13B, "Standard Specifications for Description of 'B' Series CMOS Devices"

Applications

• Servo Motor Controls
• Process Controllers