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CD74HC85 - High-Speed CMOS Logic 4-Bit Magnitude Comparator

General Description

The ’HC85 and ’HCT85 are high speed magnitude comparators that use silicon-gate CMOS technology to achieve operating speeds similar to LSTTL with the low power consumption of standard CMOS integrated circuits.

Key Features

  • Buffered inputs and outputs.
  • Typical propagation delay: 13 ns (data to output at VCC = 5 V, CL = 15 pF, TA = 25℃).
  • Serial or parallel expansion without external gating.
  • Fanout (over temperature range).
  • Standard outputs: 10 LSTTL loads.
  • Bus driver outputs: 15 LSTTL loads.
  • Wide operating temperature range:.
  • 55℃ to 125℃.
  • Balanced propagation delay and transition times.
  • Significant power reduction compared to L.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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CD54HC85, CD74HC85, CD54HCT85, CD74HCT85 SCHS136F – AUGUST 1997 – REVISED FEBRUARY 2022 CDx4HC85, CDx4HCT85 High-Speed CMOS Logic 4-Bit Magnitude Comparator 1 Features • Buffered inputs and outputs • Typical propagation delay: 13 ns (data to output at VCC = 5 V, CL = 15 pF, TA = 25℃) • Serial or parallel expansion without external gating • Fanout (over temperature range) – Standard outputs: 10 LSTTL loads – Bus driver outputs: 15 LSTTL loads • Wide operating temperature range: –55℃ to 125℃ • Balanced propagation delay and transition times • Significant power reduction compared to LSTTL Logic ICs • HC types – 2 V to 6 V operation – High noise immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5 V • HCT types – 4.5 V to 5.5 V operation – Direct LSTTL input logic compatibility, VIL = 0.