LM2901DT

Overview

The LM2901DT is a quad analog comparator manufactured by ROHM Semiconductor, designed for surface-mount applications in TSSOP-B-14 packages. It operates within a supply voltage range of 2V to 36V and supports dual power supplies up to ±18V. The device features four independent channels with open-collector outputs capable of sourcing 16mA per channel. Key electrical specifications include a typical response time of 1.3µs, an input offset voltage of 7mV, and a quiescent current of 1.1mA. It functions reliably across an extended temperature range from -40°C to +125°C.

Feature Summary

• Integrates four independent high-gain comparators on a single chip for compact circuit design.
• Supports ground-sense input operation, allowing signals near the negative rail to be detected effectively.
• Features low power consumption suitable for battery-operated or energy-efficient systems.
• Provides flexible output compatibility with various logic families through open-collector configuration.

Applications

• General-purpose voltage monitoring and threshold detection circuits
• Over-voltage and under-voltage protection systems
• Temperature sensing interfaces using thermistors or sensors
• Waveform generation and pulse width modulation controllers

Procurement Notes

Verify the specific manufacturer designation as the LM2901DT part number is also utilized by STMicroelectronics. Confirm that the ROHM version matches the required pinout and electrical tolerances for your design. Check current availability status as distribution may vary by region. Ensure the package type corresponds exactly to TSSOP-B-14 for proper PCB footprint alignment.

Selection Notes

Select this component when a quad comparator solution is required with wide supply voltage flexibility. It is appropriate for designs needing ground-referenced input capabilities without additional level shifting. Consider the 1.3µs response time for speed requirements and the 16mA output drive for direct interface loads. Evaluate thermal performance within the specified operating temperature range during system integration.

Part Context

This device belongs to the LM2901 series of quad comparators, offering a multi-channel alternative to single comparator ICs. It serves as a cost-effective solution for reducing component count in complex analog signal processing tasks. The series is widely recognized for its balance between performance and power efficiency in industrial and consumer electronics.

Replacement Considerations

Direct substitutes include other quad comparators with similar pinouts and electrical characteristics. Verify compatibility with existing board layouts when replacing with variants from different manufacturers. Ensure that input offset voltage and response time specifications meet the original design constraints.