REF3330AIDCKTG4 Equivalent & Substitute Parts

Part Overview

The REF3330AIDCKTG4 is a series voltage reference IC from Texas Instruments, delivering a fixed 3V output with ±0.15% tolerance and 5 mA output current. Housed in SC-70 (SOT-323) surface mount packaging, this component is designed for precision voltage reference applications requiring low noise and stable performance across industrial temperature ranges (-40°C to 125°C).

The REF3330AIDCKTG4 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production requirements for applications currently utilizing this reference IC.

Substiute Parts

REF3330AIDCKTG4

Texas InstrumentsIn Stock: 992REF3330AIDCKTG4 Datasheet

Current PartRFQ

REF3330AIDCKR

Texas InstrumentsIn Stock: 3096REF3330AIDCKR Datasheet

Parametric EquivalentRFQ

REF3330AIDCKT

Texas InstrumentsIn Stock: 1474REF3330AIDCKT Datasheet

Parametric EquivalentRFQ

MAX6034AEXR30+T

Analog Devices Inc./Maxim IntegratedIn Stock: 3607MAX6034AEXR30+T Datasheet

MFR RecommendedRFQ

MAX6034BEXR30+T

Analog Devices Inc./Maxim IntegratedIn Stock: 6909MAX6034BEXR30+T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the REF3330AIDCKTG4 is determined by the following critical parameters:

• Fixed output voltage of 3V
• SC-70 (SOT-323) surface mount package
• Input voltage range of 3.2V ~ 5.5V
• Operating temperature range of -40°C ~ 125°C
• RoHS3 compliance

Substitute parts are grouped into two categories:

Parametric Equivalents (Texas Instruments REF3330 Series): Parts REF3330AIDCKR and REF3330AIDCKT maintain identical electrical specifications to the main part, including 3V output, ±0.15% tolerance, 30 ppm/°C temperature coefficient, and 5 mA output current. These differ only in packaging format (Cut Tape & Digi-Reel versus tube packaging) and product status (Active versus Obsolete).

Manufacturer Recommended Alternatives (Analog Devices MAX6034 Series): Parts MAX6034AEXR30+T and MAX6034BEXR30+T provide 3V fixed output in SC-70 packaging with identical input voltage range and operating temperature specifications. These alternatives feature different tolerance grades (±0.2% and ±0.4% respectively) and reduced output current (1 mA), making them suitable for applications where lower output current demand is acceptable.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Preferred): REF3330AIDCKR and REF3330AIDCKT are the primary substitutes for REF3330AIDCKTG4. Both parts are active products from Texas Instruments with identical electrical specifications, ensuring seamless integration into existing designs. The only differences are packaging format and inventory availability. REF3330AIDCKR offers higher inventory (3037 pcs) in Cut Tape & Digi-Reel format, while REF3330AIDCKT provides 1450 pcs in the same packaging configuration. Both maintain ROHS3 compliance and are suitable for applications requiring the full 5 mA output current and extended temperature range to 125°C.

For Alternative Designs: MAX6034AEXR30+T and MAX6034BEXR30+T from Analog Devices are viable alternatives when design constraints permit tolerance and output current modifications. MAX6034AEXR30+T maintains ±0.2% tolerance with 30 ppm/°C temperature coefficient, approaching the original specification. MAX6034BEXR30+T offers ±0.4% tolerance with 75 ppm/°C temperature coefficient and is suitable for less stringent applications. Both alternatives feature reduced supply current (125 µA versus 8.5 µA) and lower output current capability (1 mA versus 5 mA). Operating temperature range is limited to -40°C ~ 85°C, which may restrict use in high-temperature environments. Both maintain ROHS3 compliance and are currently in active production with substantial inventory availability.

Frequently Asked Questions (FAQ)

Q: Can REF3330AIDCKR or REF3330AIDCKT be used as direct replacements for REF3330AIDCKTG4?

A: Yes. Both parts are parametric equivalents with identical electrical specifications, including 3V output, ±0.15% tolerance, 30 ppm/°C temperature coefficient, and 5 mA output current. The only differences are packaging format and product status (both are active). No circuit modifications are required.

Q: What are the key differences between the Texas Instruments REF3330 series substitutes and the Analog Devices MAX6034 alternatives?

A: The REF3330 series maintains the original 5 mA output current and extended operating temperature to 125°C. The MAX6034 series reduces output current to 1 mA and limits operating temperature to 85°C. MAX6034AEXR30+T provides ±0.2% tolerance, while MAX6034BEXR30+T offers ±0.4% tolerance. Supply current also increases from 8.5 µA to 125 µA in the MAX6034 series.

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

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

Q: Which substitute part should be selected if the application requires the full 5 mA output current?

A: REF3330AIDCKR or REF3330AIDCKT must be selected, as both maintain 5 mA output current. The MAX6034 series is limited to 1 mA output current and is unsuitable for applications requiring higher current delivery.

Q: Are there temperature range limitations with the substitute parts?

A: REF3330AIDCKR and REF3330AIDCKT maintain the original -40°C ~ 125°C operating range. MAX6034AEXR30+T and MAX6034BEXR30+T are limited to -40°C ~ 85°C. Applications requiring operation above 85°C must use the REF3330 series substitutes.

Q: Do all substitute parts meet RoHS3 compliance requirements?

A: Yes. All listed substitute parts are ROHS3 compliant, maintaining environmental and regulatory compliance equivalent to the original REF3330AIDCKTG4.