TLC352IP

Comparators Overview

The TLC352IP is a dual differential voltage comparator manufactured by Texas Instruments, housed in an 8-pin PDIP package. It operates on a single or dual supply ranging from 2.7V to 16V with a typical supply current of 150µA at 5V. The device features extremely high input impedance and low input bias current. Characterized for industrial temperatures between -40°C and 85°C, it offers a typical response time of 200ns and open-drain outputs compatible with TTL, MOS, and CMOS logic families.

Comparators Feature Summary

• Features extremely high input impedance and ultra-low input bias current for direct interface to high-impedance sources
• Open-drain output stage allows logical ORing and independent pull-up voltage selection up to 16V
• Built-in electrostatic discharge protection rated at 2000V
• Pin-compatible replacement for LM393 comparators

Comparators Applications

• Low-voltage battery-powered monitoring systems
• Threshold detection circuits requiring minimal power consumption
• Logic level translation between different voltage domains
• Microprocessor reset circuits and watchdog timers
• Window detector applications utilizing dual comparator channels

Comparators Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct temperature range and packaging configuration. Confirm that the selected variant matches the required operating conditions for the target application environment. Review the latest datasheet revision history for any updates to electrical characteristics or mechanical dimensions before finalizing component selection.

Comparators Selection Notes

Select this component when designing circuits that require low quiescent current and high input impedance. Ensure the external pull-up resistor value supports the desired rise time while maintaining acceptable power dissipation. Verify that the input signal remains within the common-mode voltage range to prevent phase inversion. Consider adding hysteresis if the input signal transitions slowly near the threshold voltage.

Comparators Part Context

This device belongs to the TLC352 family of micro-power comparators fabricated using CMOS technology. It provides two independent voltage comparators designed for operation from a single power supply, though dual supply operation is supported. The family includes variants with different temperature ratings and package options, such as SOIC and TSSOP, to accommodate various board space and environmental requirements.

Comparators Replacement Considerations

The TLC352IP is explicitly noted as pin-compatible with the LM393. When substituting other devices, verify that the replacement maintains the open-drain output configuration and supports the required supply voltage range. Ensure the alternative part meets the necessary input offset voltage and response time specifications for the specific circuit application.

Comparators FAQ

How should unused comparator inputs be handled?

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

What are the limitations of the open-drain output?

The output can only sink current and must be pulled up to an external voltage. Directly shorting the output to the pull-up voltage can cause thermal runaway, especially at voltages above 12V. A series current-limiting resistor is recommended if shorts are possible.

Does the device support phase inversion during operation?

No phase inversion occurs when the input voltages stay within the specified common-mode input voltage range. Exceeding these limits may result in unexpected output behavior.