What precaution should be taken when storing 4000 series CMOS ICs?
Static precautions The CMOS circuitry means that 4000 series ICs are static sensitive. Touching a pin while charged with static electricity (from your clothes for example) may damage the IC!
Which IC is in the CMOS family?
The 4000 series is a CMOS logic family of integrated circuits (ICs) first introduced in 1968 by RCA. It had a supply voltage range of 5V to 20V, which is much higher than any contemporary logic family.
What is CMOS logic?
A circuit that uses complementary pairs of p-channel and n-channel MOSFETs is called CMOS (Complementary MOS). CMOS logic ICs combine MOSFETs in various ways to implement logic functions. A logic gate composed of a single pair of p-channel and n-channel MOSFETs is called an inverter.
What is NAND logic gate?
In digital electronics, a NAND gate (NOT-AND) is a logic gate which produces an output which is false only if all its inputs are true; thus its output is complement to that of an AND gate. A LOW (0) output results only if all the inputs to the gate are HIGH (1); if any input is LOW (0), a HIGH (1) output results.
How should CMOS ICs be stored?
All CMOS devices should be stored or transported in materials that are antistatic. CMOS devices must not be inserted into conventional plastic ‘snow’, styro foam, or plastic trays, but should be left in their original container until ready for use.
What is the difference between CMOS and TTL?
CMOS stands for Complimentary Metal-oxide Semicodictor while in TTL stand for Transistor-Transistor Logic. CMOS circuit uses a field-effect transistor by connecting NMOS and PMOS, the TTL circuit uses bipolar junction transistor. The design of the CMOS can be considered to be very simpler as compared to the TTL.
What are the differences between the 74HC family and the 4000 series CMOS ICs?
The difference depends on your system definition. On the one hand, 74HC operates over a limited voltage range, with 6 volts specified as the maximum supply voltage. The CD4000 series, on the other hand, is rated to a maximum of 18 volts, so it may well be easier to use the CD4000 series in a battery-operated system.
Can I replace 74LS with 74HC?
The 74HCT has the same logic levels as 74(LS). It’s useful for shifting 3V logic up to 5V and interfacing 74(LS) with 74HC logic. The 74HCT244 can convert eight 74(LS) or 3V logic levels to 74HC 5V logic levels.
Why CMOS is used in VLSI?
These characteristics allow CMOS to integrate a high density of logic functions on a chip. It was primarily for this reason that CMOS became the most widely used technology to be implemented in VLSI chips.
What is EX OR gate?
XOR gate (sometimes EOR, or EXOR and pronounced as Exclusive OR) is a digital logic gate that gives a true (1 or HIGH) output when the number of true inputs is odd. An XOR gate implements an exclusive or ( ) from mathematical logic; that is, a true output results if one, and only one, of the inputs to the gate is true.
How many transistors are in a gate?
A NOT gate is 1 transistor. A NAND gate is 1 transistor per input. A NOR gate is 1 transistor per input. An AND gate is basically a NAND gate + a NOT gate, so it takes 1 transistor more than a NAND gate.