Bipolar transistors

Diodes

ESD protection, TVS, filtering and signal conditioning

MOSFETs

SiC MOSFETs

GaN FETs

IGBTs

Analog & Logic ICs

Automotive qualified products (AEC-Q100/Q101)

74HC85; 74HCT85

4-bit magnitude comparator

The 74HC/1 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A.

The 74HC/HCT85 are 4-bit magnitude comparators that can be expanded to almost any length. They perform comparison of two 4-bit binary, BCD or other monotonic codes and present the three possible magnitude results at the outputs (QA>B, QA=B and QA<B). The 4-bit inputs are weighted (A0 to A3 and B0 to B3), where A3 and B3 are the most significant bits.

The operation of the '85' is described in the function table, showing all possible logic conditions. The upper part of the table describes the normal operation under all conditions that will occur in a single device or in a series expansion scheme. In the upper part of the table the three outputs are mutually exclusive. In the lower part of the table, the outputs reflect the feed forward conditions that exist in the parallel expansion scheme.

For proper compare operation the expander inputs (IA>B, IA=B and IA<B) to the least significant position must be connected as follows: IA<B=IA>B= = LOW and IA=B= HIGH.

For words greater than 4-bits, units can be cascaded by connecting outputs QA<B, QA>B and QA=B to the corresponding inputs of the significant comparator.

Features and benefits

  • Serial or parallel expansion without extra gating
  • Magnitude comparison of any binary words
  • Output capability: standard
  • ICC category: MSI

Parametrics

Type numberProduct statusVCC (V)Logic switching levelsOutput drive capability (mA)tpd (ns)Nr of bitsPower dissipation considerationsTamb (°C)Rth(j-a) (K/W)Ψth(j-top) (K/W)Rth(j-c) (K/W)Package name
74HC85DProduction2.0 - 6.0CMOS± 5.2234low-40~125671.025SO16
74HC85PWProduction2.0 - 6.0CMOS± 5.2234low-40~1251021.028.7TSSOP16
74HCT85DProduction4.5 - 5.5TTL± 4264low-40~125671.024.8SO16
74HCT85PWProduction4.5 - 5.5TTL± 4264low-40~125---TSSOP16

Package

Type numberPackagePackage informationReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
74HC85D
SO16
(SOT109-1)
SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
SOT109-1_653Active74HC85D74HC85D,653
( 9337 149 50653 )
74HC85PW
TSSOP16
(SOT403-1)
SOT403-1SSOP-TSSOP-VSO-WAVE
SOT403-1_118ActiveHC8574HC85PW,118
( 9351 891 80118 )
74HCT85D
SO16
(SOT109-1)
SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
SOT109-1_653Active74HCT85D74HCT85D,653
( 9337 154 30653 )
74HCT85PW
TSSOP16
(SOT403-1)
SOT403-1SSOP-TSSOP-VSO-WAVE
SOT403-1_118Active74HCT8574HCT85PWHL
( 9356 912 06118 )

The variants in the table below are discontinued. See the table Discontinuation information for more information.

Type numberPackagePackage informationReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
74HC85D
SO16
(SOT109-1)
SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
SOT109-1_652Withdrawn / End-of-life74HC85D74HC85D,652
( 9337 149 50652 )
74HCT85D
SO16
(SOT109-1)
SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
SOT109-1_652Withdrawn / End-of-life74HCT85D74HCT85D,652
( 9337 154 30652 )

Discontinuation information

Type numberOrderable part number, (Ordering code (12NC))Last time buy dateLast time delivery dateReplacement productStatusComments
74HC85D9337149506522021-12-312022-06-3074HC85D
    74HC85PW9351891801122021-12-312022-06-3074HC85PW
      74HCT85D9337154306522021-12-312022-06-3074HCT85D

        Environmental information

        Type numberOrderable part numberChemical contentRoHSRHF-indicatorLeadfree conversion date
        74HC85D74HC85D,65374HC85Dweek 30, 2004
        74HC85PW74HC85PW,11874HC85PWweek 10, 2005
        74HCT85D74HCT85D,65374HCT85Dweek 6, 2004
        74HCT85PW74HCT85PWHL74HCT85PW

        The variants in the table below are discontinued. See the table Discontinuation information for more information.

        Type numberOrderable part numberChemical contentRoHSRHF-indicatorLeadfree conversion date
        74HC85D74HC85D,65274HC85Dweek 30, 2004
        74HCT85D74HCT85D,65274HCT85Dweek 6, 2004
        Quality and reliability disclaimer

        Documentation (7)

        File nameTitleTypeDate
        74HC_HCT854-bit magnitude comparatorData sheet2024-04-02
        SO-SOJ-WAVEFootprint for wave solderingWave soldering2009-10-08
        SO-SOJ-REFLOWFootprint for reflow solderingReflow soldering2009-10-08
        WAVE_BG-BD-1Wave soldering profileWave soldering2021-09-08
        SOT109-1plastic, small outline package; 16 leads; 1.27 mm pitch; 9.9 mm x 3.9 mm x 1.75 mm bodyPackage information2023-11-07
        SOT403-1plastic, thin shrink small outline package; 16 leads; 5 mm x 4.4 mm x 1.2 mm bodyPackage information2023-11-08
        SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08

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