Which of the following is a 4 bit Comparator IC?

This question was previously asked in
RRB ALP Electronics Mechanic 23 Jan 2019 Official Paper (Shift 3)
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  1. IC 7485
  2. IC 7805
  3. IC 555
  4. IC 7400

Answer (Detailed Solution Below)

Option 1 : IC 7485
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Detailed Solution

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  • 74LS85 is a 4-bit magnitude comparator of two binary format inputs.
  • 74LS85 can compare two 4-bit binary data and output can be given in a 3-bit parallel form.
  • The IC has low power consumption and gives output in the TTL form which makes it compatible with other TTL devices and microcontrollers.


The block diagram is as shown:

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