TLC352CD

Comparators Overview

The TLC352CD is a dual differential voltage comparator fabricated using CMOS technology, housed in an 8-pin SOIC package. It operates from a single supply voltage ranging from 2.7V to 16V or dual supplies with a difference within the same range. The device features extremely high input impedance of 10^12 ohms and low input bias current of 5pA typical. It consumes 150µA at 5V and includes built-in ESD protection rated at 2000V. The output stage is open-drain, compatible with TTL, MOS, and CMOS logic families.

Comparators Feature Summary

• High input impedance allowing direct interface to high-impedance sources
• Open-drain outputs enabling wired-AND relationships and logic level translation
• Built-in electrostatic discharge protection circuits
• Common-mode input voltage range includes ground

Comparators Applications

• Low-voltage battery-powered systems
• Voltage threshold detection circuits
• Logic level translation between different voltage domains
• Window detector applications
• Power supply monitoring

Comparators Procurement Notes

Verify the specific temperature grade required for the application, as the TLC352CD is characterized for operation from 0°C to 70°C. Ensure that the open-drain output configuration is properly pulled up to the desired logic voltage level via an external resistor. Confirm that the supply voltage remains within the recommended operating conditions to maintain specified performance parameters.

Comparators Selection Notes

Select this component when low power consumption and high input impedance are critical requirements. The open-drain output allows flexibility in interfacing with various logic families without requiring internal pull-up resistors. Consider the industrial temperature range variant if operation below 0°C is necessary. Ensure the external pull-up voltage does not exceed the maximum ratings to prevent device damage.

Comparators Part Context

The TLC352 belongs to Texas Instruments' family of micro-power comparators designed for cost-sensitive and power-conscious applications. It serves as a pin-compatible alternative to older bipolar comparator designs, offering significantly lower quiescent current. The device is suitable for general-purpose analog-to-digital conversion interfaces and signal conditioning tasks where precision offset voltage stability is important.

Comparators Replacement Considerations

The datasheet explicitly states the device is pin-compatible with the LM393. Designers replacing other components should verify that the replacement part meets the specific input impedance and bias current requirements of the original design.

Comparators FAQ

How should unused inputs be handled?

Do not tie unused inputs together as this can cause high-frequency chatter due to internal noise. Instead, tie them to a valid voltage within the specified input range that provides a minimum of 50mV differential voltage.

What is the maximum pull-up voltage for the open-drain output?

The output logic levels can be pulled up to an external voltage from 0V up to 16V, independent of the comparator supply voltage (VDD).

Can the device operate with dual supplies?

Yes, operation from dual supplies is possible if the difference between the two supplies is between 2.7V and 18V.