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SN74LS85N - 4 Bit Magnitude Comparator

View SN74LS85N: -4 Bit Magnitude Comparator (74LS Series)

SN74LS85N: -4 Bit Magnitude Comparator (74LS Series)

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Texas Instruments
Jameco Part no. 1020871
Manufacturer no. SN74LS85N
  RoHS compliant
   NCNR (Non-Cancelable, Non Returnable)
web exclusive
Pricing & Availability


# of Unit Price
5+ $1.15
25+ $1.00
50+ $0.91
  • • Order in multiples of 5
  • Availability:Ship  2 Days ARO 

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SN74LS85N - 4-Bit Magnitude Comparator

The four-bit magnitude comparator performs comparisons of straight binary and straight BCD (8-4-2-1) codes. Three fully decoded decisions about two 4-bit words (A, B) are made and are externally available at three outputs. This device is fully expandable to any number of bits without external gates. Words of greater length may be compared by connecting comparators in cascade. The A > B, A < B, and A = B outputs of a stage handling less-significant bits are connected to the corresponding A > B, A < B, and A = B inputs of the next stage handling more-significant bits. The stage handling the least-significant bits must have high-level voltage applied to the A = B input. The cascading paths of the 'LS85 are implemented with only a two-gate-level delay to reduce overall comparison times for long words. An alternate method of cascading which further reduces the comparison time is shown in the typical application data.


  • Typical Power Dissipation: 52mW
  • Typical Delay (4-bit words): 24ns

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