74HC(T)85

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

  • 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)No of bitsPower dissipation considerationsTamb (Cel)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
74HC85DB
NRND
Not for design in2.0 - 6.0CMOS+/- 5.2234low-40~12514842.0SSOP16
74HC85PWProduction2.0 - 6.0CMOS+/- 5.2234low-40~1251021.028.7TSSOP16
74HCT85DProduction4.5 - 5.5TTL+/- 4.0264low-40~125671.024.8SO16
74HCT85DB
NRND
Not for design in4.5 - 5.5TTL+/- 4.0264low-40~12514842.0SSOP16

Package

Type numberPackageOutline versionReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
74HC85D
SO16
(SOT109-1)
SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Reel 13" Q1/T1 CECCActive74HC85D74HC85D,653
( 9337 149 50653 )
Bulk Pack, CECCActive74HC85D74HC85D,652
( 9337 149 50652 )
74HC85DB
NRND

SSOP16
(SOT338-1)
SOT338-1SSOP-TSSOP-VSO-REFLOW
SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1ActiveHC8574HC85DB,118
( 9351 903 40118 )
Bulk PackActiveHC8574HC85DB,112
( 9351 903 40112 )
74HC85PW
TSSOP16
(SOT403-1)
SOT403-1SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1ActiveHC8574HC85PW,118
( 9351 891 80118 )
Bulk PackActiveHC8574HC85PW,112
( 9351 891 80112 )
74HCT85D
SO16
(SOT109-1)
SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Reel 13" Q1/T1 CECCActive74HCT85D74HCT85D,653
( 9337 154 30653 )
Bulk Pack, CECCActive74HCT85D74HCT85D,652
( 9337 154 30652 )
74HCT85DB
NRND

SSOP16
(SOT338-1)
SOT338-1SSOP-TSSOP-VSO-REFLOW
SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1ActiveHCT8574HCT85DB,118
( 9351 903 10118 )
Bulk PackActiveHCT8574HCT85DB,112
( 9351 903 10112 )

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFLeadfree conversion dateEFRIFRMTBF (hour)MSLMSL leadfree
74HC85D74HC85D,65374HC85Dweek 30, 200484.96.621.51E811
74HC85D74HC85D,65274HC85Dweek 30, 200484.96.621.51E811
74HC85DB
NRND
74HC85DB,11874HC85DBweek 12, 200511
74HC85DB
NRND
74HC85DB,11274HC85DBweek 12, 200511
74HC85PW74HC85PW,11874HC85PWweek 10, 200584.96.621.51E811
74HC85PW74HC85PW,11274HC85PWweek 10, 200584.96.621.51E811
74HCT85D74HCT85D,65374HCT85Dweek 6, 200484.96.621.51E811
74HCT85D74HCT85D,65274HCT85Dweek 6, 200484.96.621.51E811
74HCT85DB
NRND
74HCT85DB,11874HCT85DBweek 12, 200511
74HCT85DB
NRND
74HCT85DB,11274HCT85DBweek 12, 200511
Quality and reliability disclaimer

Documentation (17)

File nameTitleTypeDate
74HC_HCT854-bit magnitude comparatorData sheet2018-04-23
nexperia_selection_guide_2019_201901Selection guide 2019. Discretes, Logic and MOSFETsSelection guide2018-12-12
SOT109-1_431SO16; Reel sulfur barrier pack, SMD, 13" Q1/T1 standard product orientation Orderable part number ending ,431 or Z Ordering code (12NC) ending 431Packing2016-08-25
SOT109-1_118SO16; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering code (12NC) ending 118Packing2013-04-24
SOT109-1plastic, small outline package; 16 leads; 1.27 mm pitch; 9.9 mm x 3.9 mm x 1.35 mm bodyOutline drawing2018-10-18
SO-SOJ-REFLOWFootprint for reflow solderingReflow soldering2009-10-08
SO-SOJ-WAVEFootprint for wave solderingWave soldering2009-10-08
SOT403-1_623TSSOP16; Reel pack; SMD, 13"; Q1 Standard product orientation; Orderable part number ending, 623 or HL; Ordering code (12NC) ending 623Packing2013-05-15
SOT403-1_118TSSOP16; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering code (12NC) ending 118Packing2013-04-08
SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08
SOT403-1_128TSSOP16; Reel pack; SMD, 13", Turned Q4/T2 180 deg product orientation Orderable part number ending ,128 or HP Ordering code (12NC) ending 128Packing2014-10-14
SOT403-1_653TSSOP16; Reel pack; SMD, 13"; Q1 Standard product orientation; Orderable part number ending, 653 or HL; Ordering code (12NC) ending 653Packing2013-05-15
SOT403-1plastic, thin shrink small outline package; 16 leads; 5 mm x 4.4 mm x 1.1 mm bodyOutline drawing2018-11-14
SOT338-1_431SSOP16; Reel pack, SMD, 13" Q1/T1 standard product orientation Orderable part number ending ,431 or Z Ordering code (12NC) ending 431Packing2016-10-05
SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08
SSOP-TSSOP-VSO-REFLOWFootprint for reflow solderingReflow soldering2009-10-08
SOT338-1plastic, shrink small outline package; 16 leads; 0.65 mm pitch; 6.2 mm x 5.3 mm x 2 mm bodyOutline drawing2018-10-18

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