The 74hct family is a special version of 74hc with 74ls ttlcompatible inputs so 74hct can be safely mixed with 74ls in the same system. The 74hc0074hct00 are highspeed sigate cmos devices and are pin compatible with low power schottky. A lowcost plastic package sn7400 series was introduced in 1966 which quickly gained over 50% of the logic chip market, and eventually. Fairchild, alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors. Ps tape and reel sn74ls00psr ls00 sn74s00psr s00 ssop. They are specified in compliance with jedec standard no. Snx400, snx4ls00, and snx4s00 quadruple 2input positive. If the limited voltage range of the 74hc line is not a problem, the line is much faster. Quad 2input exclusive or gate 14 12 11 10 9 123456 vcc 8 7 gnd truth table in out a b z l l l l h h h l h h h l guaranteed operating ranges symbol parameter min typ max unit vcc supply voltage 54 74 4.
Input and output levels not compatible with ttl families. The 7400 series of integrated circuits ics were one of the most popular logic families of transistortransistor logic ttl logic chips. Dm74ls00 quad 2input nand gates general description this device contains four independent gates each of which performs the logic nand function. I want to build up an onhand inventory of various chips but am not sure what to buy. The 74hc0074hct00 are highspeed sigate cmos devices and are pin compatible with low power schottky ttl lsttl. The device inputs are compatible with standard cmos outputs. Electronics club 74 series logic ics families, 74hc. We can special order any ics part number color code legend. Db tape and reel sn74ls00dbr ls00 snj5400j snj5400j cdip. How different are the ttl and power consumption levels. Ns tape and reel sn74ls00nsr 74ls00 sn74s00nsr 74s00 sop. Uses shottky transistors to reduce the stored charge and get higher switching speeds then with conventional bipolar transistors. Sn5474ls00 quad 2input nand gate datasheet catalog.
Snx4hc00 quadruple 2input positivenand gates datasheet. Quad 2input nand gates for your next electronics project. Pdf m54hc00 280o 5474ls00 m5474hc00 ic 74hc00 m74hc00b1n tphl 74hc00 74hc00 b1 74hcoo 74hc00 equivalent 74hc00 sgsthomson 74hc00 74ls00 electrical and switching characteristics 74hc00 tphl tplh. Dm74ls00 quad 2input nand gate physical dimensions inches millimeters unless otherwise noted continued 14lead plastic dualinline package pdip, jedec ms001, 0. In fact 74hct can be used as lowpower direct replacements for the older 74ls ics in most circuits. But then the 7400 has low power 74ls00 versions and cmos compatible 74hc00 versions. The 74hc logic family is functionally as well as pinout compatible with the.
The output of a digital nand gate goes low when all of its inputs a and b, etc. The 74hc0074hct00 provide the 2input nand function. January 20 diodes incorporated 74hc00 new product quadruple 2input nand gates. Figure 1 lists basic details of popular nandgate ics. Hey guys, will i be able to safely drive 74ls with 74hc series ics andor vise versa. Ic ttl 74ls00 ic ttl 74 ls 04 7400 fanout cmos 7400 fanout ttl 7400 catalog ttl 74ls00 of ic 74ls00 74ls00 gate ttl 7400 rise and fall time. If you are using another reference please be aware that there is some. Philips semiconductors product specification quad 2input nand gate 74als00a 1991 feb 08 2 8530038 01670 type typical propagation delay typical supply current total 74als00a 4.
Quad 2input nand gate, 74ls00 datasheet, 74ls00 circuit, 74ls00 data sheet. Propagation delay time vs load capacitance mm54c10mm74c10 tlf58778 propagation delay time vs load capacitance mm54c20mm74c20 tlf58779 switching time waveforms and ac test circuit cmos to cmos tlf587710 tlf587711 note. I have read that the logic levels are not quite the same for both series ics because the hc series is cmos. Features and benefits complies with jedec standard jesd7a complies with jedec standard jesd81a input levels. I want to connect pins of the microcontroller to the 74hc00 series circuit as inputs and outputs to the circuit. January 20 diodes incorporated 74hc08 quadruple 2input and gates description. The minor disadvantage of 74hct is a lower immunity to noise, but this is unlikely to be a problem in most situations. For instance, comparing the cd401174hc00 quad 2input nand gates gives propagation delays at 5 volts of 90 nsec typ vs 7 nsec. The absolute maximum ratings are those values beyond which the safety of the device cannot be guaranteed. The 74hchct00 are highspeed sigate cmos devices and are pin compatible with low power schottky ttl lsttl. However, if it is soldered, the solder land should remain floating or be connected to gnd. For the cd4063 vs the 74hc85 4bit magnitude comparator the numbers are 625 nsec typ vs. All devices have high noise immunity and the ability to drive 10 lsttl loads.
Understanding digital buffer, gate, and logic ic circuits. View forum posts private message view blog entries view articles full member level 2 join date jun 2006. The main difference between the ls and hc is the logic of 74xx. In 1964, texas instruments introduced the first members of their ceramic semiconductor package series, the sn5400s. So if the circuit would a single 74hc00, i want to set the inputs a and b from two pins of the microcontroller and read y on another pin of the microcontroller. For example 7400 nand gates are available as 74hc00, 74hct00 and 74ls00. Ic 74hc00 74hc00 equivalent 74ls00 pin 54hc00 74hc00 74hc00 quad. Please note the revision andor date on the drawing and. Sn54hc00, sn74hc00 quadruple 2input positivenand gates scls181b december 1982 revised may 1997 post office box 655303 dallas, texas 75265 3 electrical characteristics over recommended operating freeair temperature range unless.