9.1 Overview

The ’LV86A devices are quadruple 2-input exclusive-OR gates designed for 2-V to 5.5-V V_CC operation.

These devices contain four independent 2-input exclusive-OR gates. They perform the Boolean function Y = A ⊕ B or Y = AB + AB in positive logic.

A common application is as a true/complement element. If one of the inputs is low, the other input is reproduced in true form at the output. If one of the inputs is high, the signal on the other input is reproduced inverted at the output.

9.2 Functional Block Diagram

An exclusive-OR gate has many applications, some of which can be represented better by alternative logic symbols.

A. These are five equivalent exclusive-OR symbols valid for an ’LV86A gate in positive logic; negation can be shown at any two ports.

Figure 4. Exclusive OR

The output is active (low) if all inputs stand at the same logic level (that is, A = B). Figure 5. Logic-Identity Element

The output is active (low) if an even number of inputs (that is, 0 or 2) are active. Figure 6. Even-Parity Element

The output is active (high) if an odd number of inputs (that is, only 1 of the 2) are active. Figure 7. Odd-Parity Element

9.3 Feature Description

• Wide operating voltage range, operates from 2 to 5.5 V
• Allows down voltage translation, inputs accept voltages to 5.5 V

9.4 Device Functional Modes