CD74HCT85E Datasheet High-speed CMOS Logic 4-bit Magnitude Comparator

Manufacturer: Texas Instruments

Overview: CD54HC85, CD74HC85, CD54HCT85, CD74HCT85 SCHS136F – AUGUST 1997 – REVISED FEBRUARY 2022 CDx4HC85, CDx4HCT85 High-Speed CMOS Logic 4-Bit Magnitude Comparator.

This datasheet includes multiple variants, all published together in a single manufacturer document.

Datasheet Details

Part number	CD74HCT85E
Manufacturer	Texas Instruments
File Size	1.37 MB
Description	High-Speed CMOS Logic 4-Bit Magnitude Comparator
Datasheet	CD74HCT85E CD74HC85 Datasheet (PDF)

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.

These 4-bit devices compare two binary, BCD, or other monotonic codes and present the three possible magnitude results at the outputs (A > B, A < B, and A = B).

The 4-bit input words are weighted (A0 to A3 and B0 to B3), where A3 and B3 are the most significant bits.

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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