A magnitude digital comparator is a combinational circuit that compares two digital or binary numbers consider a and b and determines their relative magnitudes in order to find out whether one number is equal, less than or greater than the other digital number. Philips semiconductors product specification 74f85 4bit magnitude comparator 2 september 27, 1994 8530055 903 features highimpedance npn base inputs for reduced loading 20. This logic circuit determines whether one 4bit word binary or bcd is less than, equal to or greater than a second 4 bit word. A comparator used to compare two binary numbers each of four bits is called a 4 bit magnitude comparator. The circuit consists of eight comparing inputs a0, a1, a2, a3, b0, b1, b2, b3, three cascading inputs a b, a 4. Electronic component documentation datasheet 7485 manufacturer national semiconductor. Nsc 4bit magnitude comparators,alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors.
Oct 29, 2017 8 bit comparator using ic 7485 part 1. They perform comparison of two 4bit binary, bcd or other monotonic codes and present the three possible magnitude results at the outputs qab, qab and qa data sheet, datasheet, data sheet, pdf, national semiconductor, 4bit magnitude comparators. The hcf4063b is a low power 4 bit magnitude comparator designed for use in computer and logic applications that require the comparison of two 4 bit words. Mm74c85 4bit magnitude comparator mm74c85 4bit magnitude comparator general description the mm74c85 is a fourbit magnitude comparator which will perform comparison of straight binary or bcd codes. Production processing does not necessarily include testing of all parameters. Ti, alldatasheet, datasheet, datasheet search site for electronic components and. It performs comparisons of two 8bit binary or bcd words. These comparators can compare 2bit, 4bit and 8bit numbers depending on the application requirement. The 74hchct85 are 4bit magnitude comparators that can be expanded to almost any length.
The least significant or only comparator in a chain should have i a b tied low and i ab tied high. Sn54s85 sn7485, sn74ls85, sn74s85 4 bit magnitude comparators m, sn7485, sn74ls85, sn74s85 4 bit magnitude comparators logic diagrams 85, l s 8 5, s 85 ttl, sn7485. Tlf6379june 198954ls85dm54ls85dm74ls854bit magnitude comparatorsgeneral descriptionthese 4bit magnitude comparators perform comparison ofstraight binary or bcd codes three fullydecoded decisionsabout two 4bit words a b are made and are externallyavailable at three outputs these devices are fully expandable to any number of bits without external gates words of datasheet search. They perform comparison of two 4bit binary, bcd or other monotonic codes and present the three possible magnitude results at the outputs qab, qab and qa m agnitude com parator designed fo r use in com puter and logic applications th at require the comparison of tw o 4 b it words. This applet shows the internal gatelevel circuit used in the ttlseries 7485 4 bit magnitude comparator ics. Nsc, alldatasheet, datasheet, datasheet search site for electronic components and. A comparator used to compare two binary numbers each of four bits is called a 4bit magnitude comparator. The sn74ls85 is a 4bit magnitude camparator which compares two 4bit words a, b, each word having four parallel inputs a0a3, b0b3. Nsc 4 bit magnitude comparators,alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors. The circuit has eight comparing inputs a3, b3, a2, b2, a1, b1, a0, b0, three cascading inputs a b, and three outputs a b. Dm74ls85 4bit magnitude comparator dm74ls85 4bit magnitude comparator general description these 4bit magnitude comparators perform comparison of straight binary or bcd codes. The cascading inputs come from the outputs of another 7485. In a 4bit comparator the condition of ab can be possible in the following four cases. Production data information is current as of publication date.
Datasheet pdf 4bit magnitude comparators national semiconductor. Please do take a look and thanks to anyone who enlightens me in advance. They perform comparison of two 4bit binary, bcd or other monotonic codes and present the three possible magnitude results at the outputs qab, qab and qa magnitude comparator the sn5474ls85 is a 4bit magnitude camparator which compares two 4bit words a, b, each word having four parallel inputs a 0 a3, b 0 b3. These devices are fully expandable to any number of bits without external gates. As for the last line of the truth table, the outputs indicate that the a inputs are simultaneously greater and less than the b inputs, which is contradictory.
Absolute maximum ratings noteif militaryaerospace specified devices are requiredplease contact the national semiconductor salesofficedistributors for availability and specificationssupply voltage7vinput voltage7voperating free air temperature rangedm54ls and 54ls datasheet search, datasheets, datasheet search site for electronic components and. Three fully decoded decisions are externally available at three outputs. Learners read an explanation of how to connect two ics to compare binary numbers by creating an 8bit comparator. The circuit consists of eight comparing inputs a0, a1, a2, a3, b0, b1, b2, b3, three cascading inputs a b, a sep 11, 2015 for the love of physics walter lewin may 16, 2011 duration. In a 4 bit comparator the condition of ab can be possible in the following four cases. Students read about the basics of using an indicator. To compare more than 4 bits, connect the outputs to the expansion inputs of the next significant comparator.
This applet shows the internal gatelevel circuit used in the ttlseries 7485 4bit magnitude comparator ics. In the first level of logic, using the nand and andorinvert gates, the corresponding bits of the a and b inputs are compared. This enables the use of current limiting resistors to interface inputs to voltages in excess of vcc. Tlf6379june 198954ls85dm54ls85dm74ls854 bit magnitude comparatorsgeneral descriptionthese 4 bit magnitude comparators perform comparison ofstraight binary or bcd codes three fullydecoded decisionsabout two 4 bit words a b are made and are externallyavailable at three outputs these devices are fully expandable to any number of bits without external gates words of datasheet search. Three fullydecoded decisions about two, 4 bit words a, b are made and are externally available at three outputs. They perform comparison of two 4bit binary, bcd or other monotonic codes and present the three possible magnitude results at the outputs qab, qab and qa 4 bit arithmetic logic unit 74169 4 bit updown counter 74299 8 bit bidirectional shift register 74280 9 bit parity generator 7485 8 bit magnitude comparator 8x8 multiplier, comparator 8 bit shift register 9 bit parity generator 4 bit updown counter 16x4 ram 4 bit alu 8 to 3, with direct clear. The least significant or only comparator in a chain should have i a b tied low and i ab. The hcf4063b is a low power 4bit magnitude comparator designed for use in computer and logic applications that require the comparison of two 4bit words. Cd4063bms is a 4bit magnitude comparator designed for use in computer and logic applications that require the comparison of two 4bit words. Operation is not restricted to binary codes, the device will work with any monotonic code.
Msi general description the 74hchct85 are highspeed sigate cmos devices and are pin compatible with low power schottky ttl lsttl. Magnitude comparator in digital logic geeksforgeeks. Three fullydecoded decisions about two, 4bit words a, b are made and are externally available at three outputs. Step by step electronics comparator circuit to turn led on off using lm393n lm393 dip. This logic circuit determines whether one 4bit word binary or bcd is less than, equal to, or greater than a second 4bit word. A in high and low states magnitude comparison of any binary words serial or parallel expansion without extra gating description the 74f85 is a 4bit magnitude comparator that can be. Ic 74ls85 4bit magnitude comparator jameco electronics. The 74f85 is a 4bit magnitude comparator that can be expanded to almost any length. This logic circuit deter mines w hether one 4 b it w ord binary or bc d is less th a n, equal to. These are available in ttl as well as cmos logic family ics and some of these ics include ic 7485 4bit comparator, ic 4585 4bit comparator in cmos family and ic 74as885 8bit comparator. Mm74c85 4 bit magnitude comparator mm74c85 4 bit magnitude comparator general description the mm74c85 is a four bit magnitude comparator which will perform comparison of straight binary or bcd codes.
If you wish to create a 16 bit magnitude comparator, the other 7485 connects to the least significant byte lsb. Bit magnitude comparator is constructed with complementary mos cmos enhancement mode devices. Products conform to specifications per the terms of texas instruments standard warranty. It compares two 4bit binary, bcd, or other monotonic codes and presents the three possible magnitude results at the outputs. Refer to applications section of data sheet for high speed method of.
Previous 1 2 the 4bit vatasheet are weightedsetting ia b low. May 18, 2019 learners read an explanation of how to connect two ics to compare binary numbers by creating an 8bit comparator. The 4bit inputs are weighted a0a3 and b0b3 where a3 and b3 are the most significant bits. The cd4063bms has eight comparing inputs a3, b3, through. Absolute maximum ratings noteif militaryaerospace specified devices are requiredplease contact the national semiconductor salesofficedistributors for availability and specificationssupply voltage7vinput voltage7voperating free air temperature rangedm54ls and 54ls datasheet search, datasheets, datasheet search site for electronic components and semiconductors, integrated circuits, diodes and. Sep 19, 2008 i got this solution whereby a 5 bit magnitude comparator was implemented using a standard 7485 4 bit magnitude comparator. Jul 14, 2019 datasheet pdf 4bit magnitude comparators national semiconductor. Full datasheet 7485 manufactirer national semiconductor. This logic circuit determines whether one 4 bit word binary or bcd is less than, equal to or greater than a second 4 bit word. Dm74ls85 4 bit magnitude comparator dm74ls85 4 bit magnitude comparator general description these 4 bit magnitude comparators perform comparison of straight binary or bcd codes. Tlf6379june 198954ls85dm54ls85dm74ls854bit magnitude comparatorsgeneral descriptionthese 4bit magnitude comparators perform comparison ofstraight binary or bcd codes three fullydecoded decisionsabout two 4bit words a b are made and are externallyavailable at three outputs these devices are fully expandable to any number of bits. I got this solution whereby a 5 bit magnitude comparator was implemented using a standard 7485 4 bit magnitude comparator. It consists of eight inputs each for two four bit numbers and three outputs to generate less than, equal to and greater than between two binary numbers.