REF3333AIDCKTG4 Equivalent & Substitute Parts

Part Overview

The REF3333AIDCKTG4 is a Series Voltage Reference IC manufactured by Texas Instruments, designed to provide a fixed 3.3V output with ±0.15% tolerance. This component is classified as a Power Management (PMIC) device and is packaged in SC-70 (SOT-323) surface mount configuration. The part is currently listed as obsolete, making identification of equivalent and substitute components essential for ongoing design support and production continuity.

Substiute Parts

REF3333AIDCKTG4

Texas InstrumentsIn Stock: 737REF3333AIDCKTG4 Datasheet

Current PartRFQ

REF3333AIDCKR

Texas InstrumentsIn Stock: 17312REF3333AIDCKR Datasheet

Parametric EquivalentRFQ

REF3333AIDCKT

Texas InstrumentsIn Stock: 15813REF3333AIDCKT Datasheet

Parametric EquivalentRFQ

MAX6034AEXR33+T

Analog Devices Inc./Maxim IntegratedIn Stock: 2903MAX6034AEXR33+T Datasheet

MFR RecommendedRFQ

MAX6034BEXR33+T

Analog Devices Inc./Maxim IntegratedIn Stock: 922MAX6034BEXR33+T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the REF3333AIDCKTG4 is determined by the following critical parameters:

• Fixed output voltage of 3.3V
• SC-70 (SOT-323) surface mount package
• Input voltage range of 4.6V ~ 5.5V
• Operating temperature range of -40°C to 125°C (or compatible subset)
• ROHS3 compliance and REACH unaffected status

Substitute parts are grouped into two categories:

Parametric Equivalents (Texas Instruments REF3333 Series): Parts REF3333AIDCKR and REF3333AIDCKT are direct parametric equivalents with identical electrical specifications to the main part. These components differ only in packaging format (Cut Tape & Digi-Reel) and product status (Active vs. Obsolete).

Manufacturer Recommended Alternatives (Analog Devices Inc./Maxim Integrated MAX6034 Series): Parts MAX6034AEXR33+T and MAX6034BEXR33+T are manufacturer-recommended alternatives that maintain the 3.3V fixed output and SC-70 package but with variations in tolerance, temperature coefficient, and supply current specifications.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Preferred): REF3333AIDCKR and REF3333AIDCKT are the primary substitutes for REF3333AIDCKTG4. Both parts maintain identical electrical specifications and operating parameters. The distinction between these two options is packaging format: REF3333AIDCKR is supplied in Cut Tape & Digi-Reel format, while REF3333AIDCKT is also supplied in Cut Tape & Digi-Reel format. Both are currently in Active product status with substantial inventory availability (17,249 and 15,777 units respectively), ensuring supply chain continuity.

For Alternative Designs: MAX6034AEXR33+T and MAX6034BEXR33+T are manufacturer-recommended alternatives from Analog Devices Inc./Maxim Integrated. These parts are suitable when design specifications allow for the following parameter variations:

• MAX6034AEXR33+T: Tolerance of ±0.2% (versus ±0.15%), lower noise floor (73µVp-p), higher supply current (125µA versus 8.5µA), and reduced operating temperature range (-40°C to 85°C). This part is recommended for applications where the tighter tolerance of the REF3333 series is not critical.

• MAX6034BEXR33+T: Tolerance of ±0.4%, output current of 1 mA (versus 5 mA), temperature coefficient of 75ppm/°C (versus 30ppm/°C), and operating temperature range of -40°C to 85°C. This part is suitable only for applications with relaxed accuracy and current requirements.

All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original component.

Frequently Asked Questions (FAQ)

Q: Can REF3333AIDCKR or REF3333AIDCKT be used as direct replacements for REF3333AIDCKTG4?

A: Yes. REF3333AIDCKR and REF3333AIDCKT are parametric equivalents with identical electrical specifications, input/output voltage ranges, tolerance, temperature coefficient, and operating temperature range. The only differences are packaging format and product status (both are Active). These parts are suitable for direct substitution in existing designs.

Q: What are the key differences between the REF3333 series and MAX6034 series?

A: The primary differences are tolerance (REF3333 offers ±0.15% versus MAX6034A at ±0.2% or MAX6034B at ±0.4%), supply current (REF3333 at 8.5µA versus MAX6034 at 125µA), and operating temperature range (REF3333 extends to 125°C versus MAX6034 limited to 85°C). The MAX6034 series offers lower noise in the 0.1Hz to 10Hz band (73µVp-p versus 92µVp-p) and improved moisture sensitivity rating (MSL 1 versus MSL 2).

Q: Are all substitute parts available in the same SC-70 package?

A: Yes. All substitute parts listed are packaged in SC-70 (SOT-323) surface mount configuration, ensuring mechanical and electrical compatibility with existing PCB layouts and solder reflow processes.

Q: What is the impact of the higher supply current in MAX6034 parts?

A: MAX6034 series parts consume 125µA of supply current compared to 8.5µA for the REF3333 series. This 14.7x increase in quiescent current may impact power budget calculations in battery-powered or low-power applications. Design review is necessary if supply current is a critical parameter.

Q: Can MAX6034BEXR33+T be used if the application requires 5 mA output current?

A: No. MAX6034BEXR33+T is specified for 1 mA output current, which is insufficient for applications requiring 5 mA. REF3333AIDCKR, REF3333AIDCKT, or MAX6034AEXR33+T (unspecified but typically higher) are appropriate alternatives.

Q: Are there temperature range limitations when substituting with MAX6034 parts?

A: Yes. MAX6034AEXR33+T and MAX6034BEXR33+T have a maximum operating temperature of 85°C, compared to 125°C for REF3333AIDCKTG4. Applications requiring operation above 85°C must use REF3333AIDCKR or REF3333AIDCKT.