REF2933AIDBZR Equivalent & Substitute Parts

Part Overview

The REF2933AIDBZR is a series voltage reference IC manufactured by Texas Instruments, designed for precision voltage regulation applications. This fixed 3.3V reference operates with ±2% tolerance and delivers up to 25 mA output current in a compact SOT-23-3 surface mount package. The device maintains active product status and is widely stocked, with 32,400 units available in inventory. Alternative equivalent and substitute parts are identified for applications requiring different output voltage levels, enhanced accuracy specifications, or alternative sourcing strategies.

Substiute Parts

REF2933AIDBZR

Texas InstrumentsIn Stock: 32479REF2933AIDBZR Datasheet

Current PartRFQ

REF2933AIDBZT

Texas InstrumentsIn Stock: 1282REF2933AIDBZT Datasheet

Parametric EquivalentRFQ

ISL21080CIH315Z-TK

Renesas Electronics CorporationIn Stock: 64777ISL21080CIH315Z-TK Datasheet

MFR RecommendedRFQ

ISL21080CIH333Z-TK

Renesas Electronics CorporationIn Stock: 1262ISL21080CIH333Z-TK Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the REF2933AIDBZR are classified into two categories based on substitution criteria:

Parametric Equivalent: REF2933AIDBZT shares identical electrical specifications with the main part, including 3.3V fixed output, ±2% tolerance, 25 mA output current, and 100 ppm/°C temperature coefficient. The only distinction is packaging format (Digi-Reel versus Cut Tape). This part qualifies as a direct drop-in replacement.

Manufacturer Recommended Alternatives: ISL21080CIH315Z-TK and ISL21080CIH333Z-TK are Renesas Electronics Corporation devices that provide enhanced performance characteristics. These parts maintain SOT-23-3 package compatibility and surface mount mounting type. The ISL21080CIH333Z-TK specifically matches the 3.3V output voltage of the main part while offering superior tolerance (±0.2% versus ±2%), lower temperature coefficient (50 ppm/°C versus 100 ppm/°C), and reduced noise specifications. The ISL21080CIH315Z-TK provides a 1.5V output alternative with equivalent performance enhancements.

Substitution eligibility is determined by: package compatibility (SOT-23-3), mounting type (surface mount), output voltage matching or application-specific requirements, and compliance certifications (ROHS3, REACH Unaffected).

Parameter Comparison

Engineering Selection Recommendations

REF2933AIDBZT is the direct equivalent for applications requiring identical electrical performance and packaging flexibility. Both Texas Instruments parts maintain active product status, ROHS3 compliance, and unlimited moisture sensitivity level (MSL 1). Selection between REF2933AIDBZR and REF2933AIDBZT depends solely on packaging format requirements (Cut Tape versus Digi-Reel).

ISL21080CIH333Z-TK is the recommended alternative when 3.3V output voltage is required and enhanced accuracy specifications are beneficial. This Renesas device provides ±0.2% tolerance compared to ±2%, 50 ppm/°C temperature coefficient versus 100 ppm/°C, and significantly reduced noise performance. The trade-off is reduced output current capability (7 mA versus 25 mA) and narrower operating temperature range (-40°C to 85°C versus -40°C to 125°C). This part is suitable for precision analog applications where output current demand does not exceed 7 mA.

ISL21080CIH315Z-TK provides equivalent performance enhancements to the ISL21080CIH333Z-TK but with 1.5V fixed output. This part is applicable only when 1.5V reference voltage is required by the application circuit.

All substitute parts maintain ROHS3 compliance, REACH Unaffected status, and active product status, ensuring regulatory and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can REF2933AIDBZT replace REF2933AIDBZR directly?

A: Yes. REF2933AIDBZT is a parametric equivalent with identical electrical specifications. The only difference is packaging format. Both parts deliver 3.3V at ±2% tolerance with 25 mA output current and are suitable for direct substitution in any application using REF2933AIDBZR.

Q: What are the key differences between REF2933AIDBZR and ISL21080CIH333Z-TK?

A: Both parts provide 3.3V fixed output in SOT-23-3 packages. ISL21080CIH333Z-TK offers superior accuracy (±0.2% versus ±2%), lower temperature coefficient (50 ppm/°C versus 100 ppm/°C), and reduced noise. However, ISL21080CIH333Z-TK has lower output current capability (7 mA versus 25 mA) and narrower operating temperature range (-40°C to 85°C versus -40°C to 125°C). Selection depends on application current requirements and temperature operating conditions.

Q: Is ISL21080CIH315Z-TK compatible with REF2933AIDBZR?

A: ISL21080CIH315Z-TK is package and mounting compatible but provides 1.5V output instead of 3.3V. This part is not a direct substitute unless the application circuit is redesigned to operate with 1.5V reference voltage. The part offers enhanced performance specifications identical to ISL21080CIH333Z-TK.

Q: What is the supply current difference between REF2933AIDBZR and ISL21080 series parts?

A: REF2933AIDBZR draws 59 µA supply current, while ISL21080CIH315Z-TK and ISL21080CIH333Z-TK draw only 1.5 µA. The ISL21080 series provides significantly lower quiescent current, beneficial for battery-powered or low-power applications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. REF2933AIDBZR, REF2933AIDBZT, ISL21080CIH315Z-TK, and ISL21080CIH333Z-TK are all ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level and REACH Unaffected status.

Q: What is the maximum output current for each part?

A: REF2933AIDBZR and REF2933AIDBZT support 25 mA maximum output current. ISL21080CIH315Z-TK and ISL21080CIH333Z-TK support 7 mA maximum output current. Applications requiring output current exceeding 7 mA must use REF2933 series parts.