CLT03-2Q3

Current Regulation/Management Overview

The CLT03-2Q3 is a dual-channel self-powered digital input current limiter manufactured by STMicroelectronics. It drastically reduces power dissipation in digital inputs by eliminating the need for an external power supply, activating solely via the input signal and consuming no power in the off state. The device supports high-side and low-side configurations and is reverse plugin compatible. It can drive opto-couplers or 3.3 V LVTTL circuits. Key electrical parameters include an operating ambient temperature range from -30 °C to 125 °C, compliance with IEC 61000-4-2 Level 1 (±4 kV air discharge, ±2 kV contact discharge), and availability in a 16-QFN package.

Current Regulation/Management Feature Summary

• Self-powered operation eliminates the need for an external power supply, reducing system complexity and power dissipation.
• High-side and low-side compatibility allows flexible integration into various industrial input architectures.
• Reverse plugin compatibility protects against incorrect wiring during installation.
• Integrated deglitch filter enhances EMC robustness for reliable performance in noisy environments.

Current Regulation/Management Applications

• Industrial PLC digital input modules requiring Type 1 and Type 3 characteristics per IEC 61131-2
• Safe automation systems utilizing isolated or non-isolated digital input configurations
• Sensor interfaces detecting fixed DC voltage or 4-20 mA signals

Current Regulation/Management Procurement Notes

Verify the specific ordering suffix to ensure the correct packaging format, such as tape and reel or cut tape, matches your assembly requirements. Confirm that the component meets RoHS3 standards and check the moisture sensitivity level for proper storage and handling procedures before soldering. Ensure the selected variant aligns with your thermal management needs given the specified operating temperature range.

Current Regulation/Management Selection Notes

Select the CLT03-2Q3 when designing digital inputs that require minimal power consumption and high reliability without dedicated supply rails. Its dual-channel architecture suits applications needing compact solutions for multiple inputs. Consider its compatibility with both opto-couplers and direct LVTTL termination when choosing between isolated and non-isolated designs for your specific safety and noise immunity requirements.

Current Regulation/Management Part Context

This component belongs to the CLT03 series of digital input current limiters designed for industrial automation. It is frequently utilized in evaluation boards like the STEVAL-IFP035V1 and integrated into safety-critical PLC solutions such as the STEVAL-SILPLC01. The device complements other ST industrial ICs to form complete input/output arrays for programmable logic controllers.

Current Regulation/Management Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult official STMicroelectronics resources for potential alternatives or cross-reference options based on specific pinout and functional requirements.

Current Regulation/Management FAQ

Does the CLT03-2Q3 require an external power supply?

No, the device is self-powered and activates using the input signal itself, consuming no power in the off state.

What standards does the CLT03-2Q3 comply with regarding digital inputs?

It enables inputs to meet Type 1 and Type 3 characteristics defined by the IEC 61131-2 standard.

Can the CLT03-2Q3 be used with isolated circuits?

Yes, it can drive isolated opto-couplers as well as non-isolated LVTTL digital input terminations.