Logic Comparators

Logic comparators, also known as binary comparators and digital comparators are semiconductor logic ICs (integrated circuits) that has been designed as a combinational circuit for the testing of values represented by one binary word.

What are Logic Comparators?

Logic comparators test whether the value is greater than, less than, or equal to the value represented by another binary word. These devices are used commonly in digital logic circuit design and are also utilised in other key logic circuits.

Types of logic comparators

There are two main types of logic comparators and they are;

  • Magnitude comparators - These devices have two outputs, 1 that is logic where object A has a greater value than value B and are used to indicate equality.
  • Identity comparators - Identity comparators are devices that compare two binary numbers that has a singular output

Logic comparators are also offered with a variety of configurations such as Number of Bits configured on to the IC, varied maximum operating supply voltage and different output types such as push pull and TTL (Transistor–transistor logic)

Applications of logic comparators

These ICs have a range of application use such as;

  • Process controllers
  • Servo-motor control
  • Correction and/or detection of instrumentation conditions
  • Logic in CPU’s

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Description Price Logic Family Logic Function Output Function Number of Bits Output Type Polarity Mounting Type Package Type Pin Count Maximum High Level Output Current Maximum Low Level Output Current Maximum Propagation Delay Time @ Maximum CL Dimensions Height
RS Stock No. 527-801
Mfr. Part No.CD74HC85E
SGD1.838
Each (In a Tube of 25)
units
HC Magnitude Comparator AB 4 - Non-Inverting Through Hole PDIP 16 -5.2mA 5.2mA 33 ns@ 6 V, 39 ns@ 4.5 V, 195 ns@ 2 V 19.3 x 6.35 x 4.57mm 4.57mm
RS Stock No. 442-763
Mfr. Part No.SN74ALS520N
SGD3.90
Each
units
ALS Identity Comparator A=B 8bit Push-Pull Inverting Through Hole PDIP 20 -2.6mA 24mA 20 ns @ 5.5 V 24.33 x 6.35 x 4.57mm 4.57mm
RS Stock No. 145-0817
Mfr. Part No.SN74LS682N
SGD3.728
Each (In a Tube of 20)
units
LS Magnitude Comparator - 8 Push-Pull Inverting Through Hole PDIP 20 -0.4mA 24mA 30 ns @ 5 V 24.33 x 6.35 x 4.57mm 4.57mm
RS Stock No. 302-895
Mfr. Part No.SN74LS682N
SGD4.12
Each
units
LS Magnitude Comparator A=B, A>B 8 Push-Pull Inverting Through Hole PDIP 20 -0.4mA 24mA 30 ns@ 5 V 24.33 x 6.35 x 4.57mm 4.57mm
RS Stock No. 309-105
Mfr. Part No.SN74LS85N
SGD2.53
Each
units
LS Magnitude Comparator AB 4 - Non-Inverting Through Hole PDIP 16 -0.4mA 8mA 45 ns@ 5 V 19.3 x 6.35 x 4.57mm 4.57mm
RS Stock No. 145-0386
Mfr. Part No.SN74LS85N
SGD1.782
Each (In a Tube of 25)
units
LS Magnitude Comparator - 4 - Non-Inverting Through Hole PDIP 16 -0.4mA 8mA 45 ns @ 5 V 19.3 x 6.35 x 4.57mm 4.57mm
RS Stock No. 145-6298
Mfr. Part No.SN74ALS520N
SGD3.087
Each (In a Tube of 20)
units
ALS Identity Comparator A=B 8 Push-Pull Inverting Through Hole PDIP 20 -2.6mA 24mA 20 ns @ 5.5 V 24.33 x 6.35 x 4.57mm 4.57mm
RS Stock No. 145-0032
Mfr. Part No.CD4585BE
SGD0.872
Each (In a Tube of 25)
units
4000 Magnitude Comparator - 4 - Non-Inverting Through Hole PDIP 16 -4.2mA 4.2mA 160 ns @ 15 V, 250 ns @ 10 V, 600 ns @ 5 V 19.3 x 6.35 x 4.57mm 4.57mm
RS Stock No. 663-0660
Mfr. Part No.CD74HCT85M
SGD2.016
Each (In a Pack of 10)
units
HCT Magnitude Comparator AB 4 - Non-Inverting Surface Mount SOIC 16 -4mA 4mA 40 ns@ 4.5 V 9.9 x 3.91 x 1.58mm 1.58mm
RS Stock No. 663-0414
Mfr. Part No.CD74HC688M
SGD3.004
Each (In a Pack of 5)
units
HC Identity Comparator A=B 8 - Inverting Surface Mount SOIC 20 -5.2mA 5.2mA 29 ns @ 6 V, 34 ns @ 4.5 V, 170 ns @ 2 V 12.8 x 7.52 x 2.35mm 2.35mm
RS Stock No. 145-6017
Mfr. Part No.SN74LS684N
SGD8.72
Each (In a Tube of 20)
units
LS Magnitude Comparator - 8 Push-Pull Inverting Through Hole PDIP 20 -0.4mA 24mA 30 ns @ 5 V 24.33 x 6.35 x 4.57mm 4.57mm
RS Stock No. 145-0441
Mfr. Part No.CD74HCT688E
SGD1.04
Each (In a Tube of 20)
units
HCT Identity Comparator A=B 8 - Inverting Through Hole PDIP 20 -4mA 4mA 34 ns @ 4.5 V 24.33 x 6.35 x 4.57mm 4.57mm
RS Stock No. 145-6299
Mfr. Part No.SN74ALS521N
SGD2.401
Each (In a Tube of 20)
units
ALS Identity Comparator A=B 8 Push-Pull Inverting Through Hole PDIP 20 -2.6mA 24mA 20 ns @ 5.5 V 24.33 x 6.35 x 4.57mm 4.57mm
RS Stock No. 663-0654
Mfr. Part No.CD74HCT688M
SGD1.36
Each (In a Pack of 5)
units
HCT Identity Comparator A=B 8 - Inverting Surface Mount SOIC 20 -4mA 4mA 34 ns @ 4.5 V 12.8 x 7.52 x 2.35mm 2.35mm
RS Stock No. 162-6964
Mfr. Part No.CD74HC85PWR
SGD0.651
Each (On a Reel of 2000)
units
HC Magnitude Comparator - 4 - Non-Inverting Surface Mount TSSOP 16 -5.2mA 5.2mA 33 ns @ 6 V, 39 ns @ 4.5 V, 195 ns @ 2 V 5 x 4.4 x 1.15mm 1.15mm
RS Stock No. 145-0442
Mfr. Part No.CD74HCT688M
SGD1.078
Each (In a Tube of 25)
units
HCT Identity Comparator A=B 8 - Inverting Surface Mount SOIC 20 -4mA 4mA 34 ns @ 4.5 V 12.8 x 7.52 x 2.35mm 2.35mm
RS Stock No. 170-8068
Mfr. Part No.74HC688D,652
BrandNexperia
SGD0.742
Each (In a Tube of 38)
units
74HC Magnitude Comparator A=B 8 Single Ended Inverting Surface Mount SO 20 -5.2mA 5.2mA 255 ns @ 50 pF 13 x 7.6 x 2.45mm 2.45mm
RS Stock No. 662-7207
Mfr. Part No.CD74HC85PWR
SGD1.275
Each (In a Pack of 10)
units
HC Magnitude Comparator AB 4 - Non-Inverting Surface Mount TSSOP 16 -5.2mA 5.2mA 33 ns@ 6 V, 39 ns@ 4.5 V, 195 ns@ 2 V 5 x 4.4 x 1.15mm 1.15mm
RS Stock No. 806-3333
Mfr. Part No.MC14585BDG
SGD0.929
Each (In a Pack of 20)
units
- Magnitude Comparator - 4 TTL - Surface Mount SOIC 16 - - - 10 x 4 x 1.5mm 1.5mm
RS Stock No. 145-0454
Mfr. Part No.SN74HC688DW
SGD1.333
Each (In a Tube of 25)
units
HC Identity Comparator A=B 8 - Inverting Surface Mount SOIC 20 -5.2mA 5.2mA 36 ns @ 6 V, 42 ns @ 4.5 V, 210 ns @ 2 V 12.8 x 7.52 x 2.35mm 2.35mm