REF3233AIDBVT Equivalent & Substitute Parts

Part Overview

The REF3233AIDBVT is a series voltage reference IC manufactured by Texas Instruments, delivering a fixed 3.3V output with ±0.2% tolerance in a SOT-23-6 surface mount package. This device is classified as not for new designs, indicating it has been superseded in the product lifecycle. Finding equivalent substitute parts is necessary for applications requiring continued support, inventory replenishment, or design flexibility where alternative reference ICs meet the electrical and mechanical specifications.

Substiute Parts

REF3233AIDBVT

Texas InstrumentsIn Stock: 2074REF3233AIDBVT Datasheet

Current PartRFQ

REF3433IDBVR

Texas InstrumentsIn Stock: 19422REF3433IDBVR Datasheet

MFR RecommendedRFQ

ADR3433ARJZ-R2

Analog Devices Inc.In Stock: 3366ADR3433ARJZ-R2 Datasheet

MFR RecommendedRFQ

ADR3433ARJZ-R7

Analog Devices Inc.In Stock: 51575ADR3433ARJZ-R7 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the REF3233AIDBVT are selected based on the following critical parameters that determine functional compatibility:

Core Compatibility Criteria:

• Fixed output voltage of 3.3V
• Output current capability of 10 mA minimum
• SOT-23-6 surface mount package
• Operating temperature range of -40°C to 125°C
• Input voltage range overlap with 3.35V ~ 5.5V

Substitution Logic: The REF3433IDBVR from Texas Instruments and the ADR3433ARJZ-R2 and ADR3433ARJZ-R7 from Analog Devices Inc. meet all core compatibility requirements. These parts maintain the same output voltage, current rating, package form factor, and operating temperature specifications. While these substitutes offer improved electrical characteristics (tighter tolerance, lower noise, lower temperature coefficient), they remain functionally interchangeable at the system level for applications designed around the REF3233AIDBVT specifications.

Parameter Comparison

Engineering Selection Recommendations

REF3433IDBVR (Texas Instruments): This part is the primary recommended substitute from the original manufacturer. It maintains Texas Instruments product lineage within the REF34xx series and carries active product status. The REF3433IDBVR offers superior electrical performance with ±0.05% tolerance and 6 ppm/°C temperature coefficient, while maintaining full compatibility with the REF3233AIDBVT footprint and pinout. ROHS3 compliance and MSL 2 rating ensure regulatory and handling consistency.

ADR3433ARJZ-R2 and ADR3433ARJZ-R7 (Analog Devices Inc.): Both variants provide cross-manufacturer substitution with active product status. These parts deliver ±0.1% tolerance and 8 ppm/°C temperature coefficient, representing a middle ground between the original REF3233AIDBVT and the REF3433IDBVR. The ADR3433ARJZ-R7 offers significantly higher inventory availability (51,500 pcs) compared to ADR3433ARJZ-R2 (3,276 pcs). Both maintain SOT-23-6 packaging and ROHS3 compliance, with improved MSL 1 rating (unlimited shelf life) versus the original MSL 2 specification.

Frequently Asked Questions (FAQ)

Q: Can the REF3433IDBVR directly replace the REF3233AIDBVT in existing designs? A: Yes. Both parts share identical output voltage (3.3V), output current (10 mA), SOT-23-6 package, and operating temperature range (-40°C to 125°C). The REF3433IDBVR is pin-compatible and functionally interchangeable. The improved tolerance and temperature coefficient represent enhanced performance characteristics that do not compromise backward compatibility.

Q: What are the key differences between the Texas Instruments and Analog Devices substitutes? A: The REF3433IDBVR offers the tightest tolerance (±0.05%) and lowest temperature coefficient (6 ppm/°C). The ADR3433ARJZ variants provide ±0.1% tolerance and 8 ppm/°C temperature coefficient. All three maintain the same 3.3V output, 10 mA current, and SOT-23-6 package. Selection depends on tolerance and noise performance requirements for the specific application.

Q: Are there input voltage range considerations when substituting? A: The REF3233AIDBVT operates from 3.35V to 5.5V. The REF3433IDBVR extends this to 3.8V to 12V, providing broader input range capability. The ADR3433ARJZ variants operate from 4.6V to 5.5V. For applications within the original 3.35V to 5.5V window, all substitutes are compatible. Applications requiring input voltages below 4.6V should verify compatibility with the specific substitute selected.

Q: How do noise specifications compare across these parts? A: The REF3233AIDBVT produces 43 µVp-p (0.1Hz to 10Hz) and 63 µVrms (10Hz to 10kHz). The REF3433IDBVR significantly reduces noise to 5 µVp-p and 24 µVrms respectively. The ADR3433ARJZ variants produce 25 µVp-p and 46 µVrms. Applications sensitive to reference noise should prioritize the REF3433IDBVR for lowest noise performance.

Q: What is the significance of the product status change from "Not For New Designs" to "Active"? A: The REF3233AIDBVT carries "Not For New Designs" status, indicating Texas Instruments has transitioned this product. All substitute parts carry "Active" status, confirming ongoing manufacturer support, continued availability, and long-term supply assurance. This status change supports design longevity and supply chain reliability.

Q: Are moisture sensitivity level (MSL) differences important for assembly and storage? A: The REF3233AIDBVT carries MSL 2 (1 Year shelf life). The REF3433IDBVR maintains MSL 2 (1 Year). The ADR3433ARJZ variants offer improved MSL 1 (Unlimited shelf life), reducing moisture-related handling constraints and extending storage windows. For high-volume or long-lead applications, the MSL 1 rating of Analog Devices parts provides operational flexibility.