TS3702CD

Overview

The TS3702CD is a micropower dual CMOS voltage comparator manufactured by STMicroelectronics. It operates on a single supply of 2.7V to 16V or dual supplies of ±1.35V to ±8V. The device features extremely low supply current of 9µA typical per comparator and high input impedance of 10^12Ω typical. Electrical characteristics include an input offset voltage of 5mV typical at 3V, response times of 1.5µs (low-to-high) and 2.2µs (high-to-low) with 5mV overdrive, and push-pull CMOS outputs capable of sourcing/sinking 4mA. It functions in the commercial temperature range of 0°C to +70°C.

Feature Summary

• Push-pull CMOS output stage eliminates the need for external pull-up resistors
• Extremely low supply current consumption of 9µA typical per comparator
• High input impedance of 10^12Ω typical with input common-mode voltage including ground
• Pin-to-pin and functionally compatible with bipolar LM393

Applications

• Battery-powered systems requiring low power consumption
• Signal conditioning circuits
• Window comparator configurations
• General-purpose analog signal comparison

Procurement Notes

Verify that the specific order code matches the required package type, as the TS3702CD designation corresponds to the SO8 plastic micropackage. Confirm the temperature grade aligns with system requirements, noting that this part represents the commercial grade variant operating between 0°C and +70°C. Ensure compatibility with existing PCB footprints designed for standard SO8 components.

Selection Notes

Select the TS3702CD when a direct replacement for the LM393 is needed but lower power consumption is critical. The push-pull output simplifies circuit design by removing external pull-up resistors. Consider this component for applications where input bias currents must be minimized due to the high input impedance characteristic of the CMOS technology.

Part Context

The TS3702 belongs to a family of micropower dual CMOS voltage comparators from STMicroelectronics. It serves as a low-power alternative to traditional bipolar comparators like the LM393. The series includes variants such as the TS3702IN for industrial temperatures and the TSX3702 for automotive grades with enhanced ESD tolerance and even lower current consumption.

Replacement Considerations

The TS3702CD is pin-to-pin and functionally compatible with the bipolar LM393. Designers replacing LM393 units should verify that the new push-pull output drive capabilities meet the load requirements previously handled by open-collector outputs.