74LS04 is a gate circuit with threshold voltage. When the input voltage rises from low level to threshold voltage or falls from high level to threshold voltage, the state of the circuit will change. 74LS 14 is a Schmitt trigger and a special gate circuit. Different from ordinary gate circuits, Schmitt trigger has two threshold voltages, which are called positive threshold voltage and negative threshold voltage respectively. The input voltage that changes the circuit state when the input signal rises from low level to high level is called positive threshold voltage, and the input voltage that changes the circuit state when the input signal falls from high level to low level is called negative threshold voltage. The difference between the positive threshold voltage and the negative threshold voltage is called the return difference voltage.
It is a threshold switching circuit with abrupt input and output characteristics. This circuit is designed to prevent the slight change of input voltage (below a certain threshold) from causing the change of output voltage.
By using the positive feedback in the process of Schmidt trigger state transition, the periodic signal with slow edge change can be transformed into a rectangular pulse signal with steep edge. As long as the amplitude of the input signal is greater than vt+, a rectangular pulse signal with the same frequency can be obtained at the output of Schmidt trigger.
For the difference between 74ls04 and 74LS 14, please kneel down and ask for the technical arguments of 74ls 14 and 74LS04. Sorry, I read LS04 carefully today, and I found it was wrong before. My answer is wrong. sorry The following changes:
74LS04 and 74LS 14 are not 74 series doors.
Their difference is:
1, output: 74LS04 is the same as 74LS 14. If the same company, the output parameters are the same.
2. Input: The difference between the two is the different input. The 74LS04 input is TTL level, and the 74LS 14 input is Schmidt input (with hysteresis).
Because of the different inputs, the applications of the two chips are also different. 74LS04 is mostly used for NOT control of general data in the board, and 74LS 14 is generally used for signal shaping or signal buffering of abnormal interference/key signals.
74LS 14 can replace 74LS04 in most cases.
74LS04N is different from 74LS04. 74LS04N and 74LS04 are the same devices with the same pin arrangement and function. N after 74LS04N is the package form, which means that the device package is a dual in-line plastic package. 74LS04 omits the label of the package, which is generally a dual in-line plastic package.
The difference between 74ls04 and 74ls05 is that 74ls04 is a six-inverter, and 74ls05 is a six-inverter with open collector output. 04 and 05 are variety codes.
Differences between 74ls 14 and 7405 74LS Series
This is the main product family in the current TTL type. There are many varieties and manufacturers. The cost performance is relatively high. At present,
Widely used in small and medium-sized circuits. The 74 series, an early product, is still in use now, but it is gradually being eliminated. 74ls 14 inverter (Schmidt trigger), 7405 is a six-inverter (OC), which can be replaced by 74S05/74H05/74LS05/74HC05, etc.
What's the difference between 74ls 193 and 74ls 16 1? 74 193 is a dual-clock 4-bit binary synchronous reversible counter (so it can be added and subtracted);
74 16 1 is a 4-bit binary synchronous addition counter (addition only).
The difference between 74LS04 and 74als04: 74ls04 and 74LS 14 are not gates of 74 series.
Their difference is:
1, output: 74LS04 is the same as 74LS 14. If the same company, the output parameters are the same.
2. Input: The difference between the two is the different input. The 74LS04 input is TTL level, and the 74LS 14 input is Schmidt input (with hysteresis).
Because of the different inputs, the applications of the two chips are also different. 74LS04 is mostly used for NOT control of general data in the board, and 74LS 14 is generally used for signal shaping or signal buffering of abnormal interference/key signals.
74LS 14 can replace 74LS04 in most cases.
74ALS04 and 74LS04 are both six inverters.
74LS04 is a 6-gate IC with a working voltage of 5V.
1 pin 1A
2 feet 2 inches
3 ft 2A
4-pin VCC
5 ft 3A
6 feet 3 inches
7 ft 4A
8 feet 4 inches
9 ft 5A
10 ft 5Y
1 1 PIN GND
12 jiao 6Y
13 coke 6a
14 ft 1Y
IOL 16mA (maximum driving capacity is 16mA)
In practical application, there is basically no difference between the two.
That makes no difference.
What's the difference between 74lvc 14 and 74ls 14? The manufacturing process is different, so the working voltage range is different. The working voltage range of 74LVC series logic devices is 1.65V~3.6, while the working voltage range of 74LS series logic devices is 4.75V~5.25V, which leads to their different high and low level specifications, which is the most important.
In addition, the power consumption of 74LVC series devices is lower than that of 74LS series, and the speed is also faster than that of 74LVC series.