74AS00 Quad 2-Input NAND Gate. Physical Dimensions inches (millimeters) unless otherwise noted (Continued). Lead Plastic Dual-In-Line Package ( PDIP). 74AS00 Datasheet, 74AS00 PDF, 74AS00 Data sheet, 74AS00 manual, 74AS00 pdf, 74AS00, datenblatt, Electronics 74AS00, alldatasheet, free, datasheet. description. These devices contain four independent 2-input positive-NAND gates. They perform the Boolean functions Y = A • B or Y = A + B in positive logic.

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Let us examine the typical totem-pole output once again. In order to put into perspective where the above devices fit into the scheme of things and how far we have come, it would be instructive to look at a chronology of computer electronics.

When and why would you use tri-state and open-collector outputs as opposed to totem-pole outputs? Analyze the circuits and explain the results.

Study the feedback circuits shown and use the oscilloscope to examine the signal at different stages in the circuit. Problem 8 – Timer The timer IC is a popular circuit for generating asymmetric rectangular waves.

74ax00 10 What is meant by negative logic? To give students a sense of the magnitudes of voltage, current, resistance, capacitance, time, frequency, etc. When G is LO, the output is in the high impedance state. Digital logic is implemented using integrated circuits which are classified into families based on their basic electronic structure.

In other words, when Q3 is closed, Q4 is open. 74as000 is the diference between a inverter and a Schmitt trigger? Problem 7 – Schmitt trigger oscillator Construct this simple oscillator and measure the frequency of oscillation for a given R and C. That is, from Ohm’s Law one talks about 1 volt across 1 ohm produces 1 ampere. An unconnected input is said to be floating. Families can be characterized by the relationship between ddatasheet and power.

### (PDF) 74AS00 Datasheet PDF Download – Quadruple 2-Input Positive-NAND Gates

This configuration with Q4 stacked on top of Q3 is referred to as a totem-pole output. Why is negative logic commonly used? What is the range that would be considered a logic HI? 74aa00, when Q3 is open, Q4 is closed.

What is the maximum current flowing through the outputs in c? Regardless of the IC’s datashee or how it is created, basic knowledge of gates and flip-flops is still essential.

The tri-state bus driver has an enable input G. Construct the circuit shown and study how the frequency and duty cycle are affected by R2 and C. The propagation delay inherent in gates can be useful for creating oscillatory circuits. Using a very high frequency clock input measure the propagation delay of a typical 74xx or 74LSxx TTL gate.

Draw the input and output waveforms timing diagram. In contrast with a normal totem-pole output, it cannot be the source of datazheet and therefore cannot present a logic-HI on its own. Be sure to measure the transfer function for both increasing as well as decreasing input voltages.

### 4D6 Lab Manual – Chapter 6

What is the voltage range that would be considered a logic LO? What happens when the outputs of two totem-pole outputs are connected together? What is the minimum and maximum values of R and C? What is the smallest value of R such that the output is still LO?

The following table is a growing list of various sub-families with their characteristics and designations. Use a 1K potentiometer to supply a variable input voltage.

## (PDF) 74AS00 Datasheet download

This is called the high impedance or Hi-Z state. What is the meaning of hysteresis? In this diagram, observe that the output stage consists of two dahasheet elements, Q3 and Q4.