TLC339CD

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Linear comparators are used for comparisons in applications such as battery-powered instrumentation, interface detection, and error detection. The TLC339CD is a 3.2V, high-performance CMOS linear-comparator and voltage reference circuit with two independent, non-inverting comparators and two low-power, precision voltage references on the same chip. This device features a wide input common mode range, wide output swing, low power consumption and extended supply voltage range.

The TLC339CD is a single-supply circuit composed of two independent comparators and two voltage references, along with associated protection and logic circuitry. The 0.2V and 4.096V voltage references are powered by the internal bandgap generator, while the two comparators are powered directly by the supply voltage.

The main application of the TLC339CD is in battery-powered, low-power systems, where the device can be used to monitor battery voltage and control power dissipation. This function can be implemented using either the comparator or the voltage reference, depending on the application. Moreover, the TLC339CD can be used to detect errors in communications systems, interface between analog and digital circuits, switch on and off loads, and detect step changes in system parameters.

The device\'s comparator input can be configured to receive the reference voltage, the device supply voltage, an external voltage, or a voltage from a voltage divider. The comparator then looks for a voltage change and produces a corresponding output signal. The positive input of the non-inverting comparator is always higher than the negative side. If the positive input exceeds the negative input, the output of the comparator will be high. If the negative side is higher than the positive side, the output will be low.

The device\'s voltage reference is driven by an internal bandgap generator and generates a regulated 0.2V or 4.096V reference voltage. This voltage can then be used to compare the device\'s supply voltage, the user-configured input voltage, or an external voltage. When the reference voltage is higher than the input voltage, the output signal will be high; otherwise, it will be low.

In addition to the comparator and voltage reference, the TLC339CD includes additional protection and logic circuits. The device includes an internal reverse-biased diode, which prevents damage due to excessive input voltages. The optional open-drain output can be used to actively drive device outputs. This feature can be used to turn off load switches, turn on LED indicators, or to reset microprocessors.

The TLC339CD is a high-performance CMOS linear-comparator and voltage reference circuit, designed for battery-powered instruments, interface detection, and error detection. Its two comparators, two voltage references and associated safety features make it a versatile, low-power device for a wide range of applications.

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