1. First, find a 74LS195 chip, connect its J and K input terminals together, connect R and LOAD terminals to the high level, connect CP terminals to the pulse signal, and then number the output terminals Q0 and QQQ3 from left to right and from top to bottom, as shown in the figure.
2, ls20 is two 4 input and not gates, including two groups of 4 and not gates the first group: 1,2,4,5 connected to the circuit input, 6 connected to the circuit output. The second group: 9,10,12,13 connected to the circuit input, 8 connected to the circuit output.Pins 3 and 11 are empty and do not connect cables.
3. Connect the output port of the first and not gate to an input port of the second and not gate. Take the output port of the second and not gate as the final output signal.
1, MA. According to the query number of power grid display, 74ls20 is a commonly used double 4 input and non-gate integrated circuit, commonly used in various digital circuits and single-chip microcomputer systems, high level output powerThe flow is 16 mA.
2, ls20 is a commonly used double 4 input and non-gate integrated circuit, commonly used in a variety of digital circuits and single-chip microcomputer systems, its logic function is to complete the four input logic and non-computing functions. The 74ls20 includes two 4 input and not gates, including two sets of 4 and not gates.
3, LS20 is a double four-input and non-gate, that is, two independent four-input and non-gates: Y1= (A1B1C1D1) take non, Y2= (A2B2C2D2) take non, Y1 and Y2 logical values are independent.
4. LS20 is doubly 4-loseIn and not gates, that is, the interior consists of two 4 input and not gates. The 74LS00 chip is composed of four 2-input and non-gates.
5, ls20 is two 4 input and not gates, including two groups of 4 and not gates the first group: 1,2,4,5 connected to the circuit input, 6 connected to the circuit output. The second group: 9,10,12,13 connected to the circuit input, 8 connected to the circuit output. Pins 3 and 11 are empty and do not connect cables.
6, the role of LS20 and 74LS00:74LS00 is a double input and not gate, 74LS20 is a four input and not gate, theyThe realization is the corresponding logical function. And not gate is a combination of and gate and not gate, first performing and operation, then performing non-operation.
The model number is 74HCCD406CD4023. 74HC10: This is a three-input and non-gate chip for TTL and CMOS interfaces. CD4069: This is a chip containing six and not gates, each of which can accept three inputs, with outputs that are low if and only if all inputs are low.
threeInput or non-gate chip models are as follows: SN74LS27N, 74AC4075, CD4075. SN74LS27N: This is a three-input or non-gate chip produced by TexasInstruments in a DIP-14 package with a wide operating temperature range and high performance.
, 7410, and 7420. According to the inquiry of the official website of Huaqiang Electronics, the integrated chips of two-input and non-gate and three-input and non-gate are 7400, 7410 and 7420. The 7400 is a chip with four internal two-input and non-gates.
is four-input. You can make one out of it. Virtual components can also be used. In multisim10, EOR3 is a three-input, followed by an 8-input. 74HC series devices are wide operating voltage range, can work in 2~6V voltage, the operating voltage is different, the range of input and output levels is different.
Common component model: and door: two Input: 7408N, 7408J, 7409N; Three inputs: 74ALS11AM, 74ALS11AN; Four input: 74AS21N. Or door: Two input:> < p >