REF3330AIDBZTG4 Equivalent & Substitute Parts

Part Overview

The REF3330AIDBZTG4 is a series voltage reference IC from Texas Instruments, delivering a fixed 3V output with ±0.15% tolerance in a SOT-23-3 surface mount package. This part is classified as obsolete, making equivalent substitutes necessary for new designs and production continuity. The device operates across a 3.2V to 5.5V input range with 5 mA output current capability and ultra-low supply current of 8.5µA, suitable for precision analog applications requiring stable voltage references.

Key Parameters

Parameter	Value
Reference Type	Series
Output Type	Fixed
Voltage - Output (Min/Fixed)	3V
Current - Output	5 mA
Tolerance	±0.15%
Temperature Coefficient	30ppm/°C
Noise - 0.1Hz to 10Hz	84µVp-p
Voltage - Input	3.2V ~ 5.5V
Current - Supply	8.5µA
Operating Temperature	-40°C ~ 125°C (TA)
Package / Case	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	2 (1 Year)

Substitute Part Grouping Explanation

Substitution of the REF3330AIDBZTG4 is determined by the following critical parameters: fixed 3V output voltage, SOT-23-3 package compatibility, surface mount mounting type, and electrical specifications within acceptable ranges. Substitute parts are grouped into three categories based on their relationship to the original specification:

Parametric Equivalents (Texas Instruments REF3330 Series): Parts REF3330AIDBZR and REF3330AIDBZT maintain identical electrical specifications to the main part—3V fixed output, ±0.15% tolerance, 5 mA output current, 30ppm/°C temperature coefficient, and 84µVp-p noise performance. These differ only in product status (active vs. obsolete) and packaging format (Digi-Reel vs. standard tape).

Manufacturer Recommended Alternatives (Renesas ISL60002 Series): Parts ISL60002BIH330Z-TK, ISL60002CIH330Z-TK, and ISL60002DIH330Z-TK provide superior electrical performance with tighter tolerance specifications (±0.03% to ±0.17%), lower temperature coefficients (20ppm/°C), reduced noise (30µVp-p), and significantly lower supply current (900nA). These maintain the 3V output, SOT-23-3 package, and 7 mA output current capability.

Manufacturer Recommended Alternatives (Analog Devices MAX6063/MAX6103 Series): Parts MAX6063AEUR+T, MAX6063BEUR+T, and MAX6103EUR+T deliver 3V fixed output in SOT-23-3 packages with tolerance ranges from ±0.2% to ±0.4%, 5 mA output current, and extended input voltage range (3.2V to 12.6V). These offer broader input compatibility at the cost of relaxed tolerance specifications.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Tolerance	Output Current	Temperature Coefficient	Noise (0.1Hz-10Hz)	Supply Current	Input Voltage Range	Operating Temp	Package	Product Status
REF3330AIDBZTG4	Texas Instruments	3V	±0.15%	5 mA	30ppm/°C	84µVp-p	8.5µA	3.2V ~ 5.5V	-40°C ~ 125°C	SOT-23-3	Obsolete
REF3330AIDBZR	Texas Instruments	3V	±0.15%	5 mA	30ppm/°C	84µVp-p	8.5µA	3.2V ~ 5.5V	-40°C ~ 125°C	SOT-23-3	Active
REF3330AIDBZT	Texas Instruments	3V	±0.15%	5 mA	30ppm/°C	84µVp-p	8.5µA	3.2V ~ 5.5V	-40°C ~ 125°C	SOT-23-3	Active
ISL60002BIH330Z-TK	Renesas Electronics	3V	±0.03%	7 mA	20ppm/°C	30µVp-p	900nA	3.2V ~ 5.5V	-40°C ~ 85°C	SOT-23-3	Active
ISL60002CIH330Z-TK	Renesas Electronics	3V	±0.08%	7 mA	20ppm/°C	30µVp-p	900nA	3.2V ~ 5.5V	-40°C ~ 85°C	SOT-23-3	Active
ISL60002DIH330Z-TK	Renesas Electronics	3V	±0.17%	7 mA	20ppm/°C	30µVp-p	900nA	3.2V ~ 5.5V	-40°C ~ 85°C	SOT-23-3	Active
MAX6063AEUR+T	Analog Devices/Maxim	3V	±0.2%	5 mA	20ppm/°C	35µVp-p	125µA	3.2V ~ 12.6V	-40°C ~ 85°C	SOT-23-3	Active
MAX6063BEUR+T	Analog Devices/Maxim	3V	±0.4%	5 mA	30ppm/°C	35µVp-p	125µA	3.2V ~ 12.6V	-40°C ~ 85°C	SOT-23-3	Active
MAX6103EUR+T	Analog Devices/Maxim	3V	±0.4%	5 mA	75ppm/°C	35µVp-p	125µA	3.2V ~ 12.6V	-40°C ~ 85°C	SOT-23-3	Active

Engineering Selection Recommendations

Direct Replacement (Preferred): REF3330AIDBZR and REF3330AIDBZT are direct parametric equivalents with identical electrical performance and active product status. Both maintain ROHS3 compliance and are recommended for designs requiring no circuit modification. REF3330AIDBZR offers superior inventory availability (41,585 units) compared to REF3330AIDBZT (1,162 units).

Enhanced Performance Substitutes: The Renesas ISL60002 series (ISL60002BIH330Z-TK, ISL60002CIH330Z-TK, ISL60002DIH330Z-TK) provides measurably superior electrical characteristics: tighter tolerance specifications, lower temperature coefficients, reduced noise floor, and dramatically lower supply current (900nA vs. 8.5µA). These are suitable for applications where improved precision and lower power consumption provide system benefits. Operating temperature range is reduced to -40°C to 85°C. MSL rating improves to 1 (Unlimited).

Broad Compatibility Substitutes: The Analog Devices MAX6063 and MAX6103 series accommodate extended input voltage ranges (up to 12.6V) while maintaining 3V fixed output and SOT-23-3 packaging. These are appropriate for systems with variable supply voltages. Tolerance specifications are relaxed (±0.2% to ±0.4%), and supply current is elevated (125µA). Operating temperature range is -40°C to 85°C.

All substitute parts maintain ROHS3 compliance, REACH unaffected status, and EAR99 export classification consistent with the original part.

Frequently Asked Questions (FAQ)

Q: Can REF3330AIDBZR directly replace REF3330AIDBZTG4 without circuit modification?

A: Yes. REF3330AIDBZR is a parametric equivalent with identical electrical specifications: 3V fixed output, ±0.15% tolerance, 5 mA output current, 30ppm/°C temperature coefficient, and 84µVp-p noise performance. Both use SOT-23-3 packaging. The only differences are product status (active vs. obsolete) and packaging format. No circuit changes are required.

Q: What are the key differences between Texas Instruments REF3330 and Renesas ISL60002 series?

A: The ISL60002 series delivers superior electrical performance with tighter tolerance (±0.03% to ±0.17% vs. ±0.15%), lower temperature coefficient (20ppm/°C vs. 30ppm/°C), reduced noise (30µVp-p vs. 84µVp-p), and significantly lower supply current (900nA vs. 8.5µA). Output current is increased to 7 mA. Operating temperature range is reduced to -40°C to 85°C. Both maintain 3V output and SOT-23-3 packaging.

Q: Are the Analog Devices MAX6063 and MAX6103 parts suitable substitutes?

A: MAX6063AEUR+T and MAX6063BEUR+T are suitable substitutes for applications tolerating relaxed tolerance specifications (±0.2% to ±0.4%) and higher supply current (125µA). These parts offer extended input voltage range (3.2V to 12.6V) beneficial for variable supply systems. MAX6103EUR+T has a higher temperature coefficient (75ppm/°C) and should be selected only when the extended input range is required. All maintain 3V output and SOT-23-3 packaging.

Q: What is the impact of operating temperature range differences?

A: The original REF3330AIDBZTG4 operates to 125°C; substitute parts from Renesas and Analog Devices operate to 85°C maximum. Applications requiring operation above 85°C must use REF3330AIDBZR or REF3330AIDBZT. For applications with maximum operating temperature at or below 85°C, all substitutes are compatible.

Q: How do supply current differences affect system design?

A: The REF3330 series draws 8.5µA; Renesas ISL60002 series draws 900nA (approximately 9.4× lower); Analog Devices MAX6063/MAX6103 series draws 125µA (approximately 14.7× higher). For battery-powered or ultra-low-power applications, ISL60002 series is preferred. For applications with adequate power supply capacity, MAX6063/MAX6103 series is acceptable.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, REACH unaffected status, and EAR99 export classification consistent with the original REF3330AIDBZTG4.

Q: What packaging formats are available for each substitute?

A: REF3330AIDBZR is available in Cut Tape (CT) & Digi-Reel format. REF3330AIDBZT is available in Cut Tape (CT) & Digi-Reel format. ISL60002BIH330Z-TK is available in Tape & Reel (TR). ISL60002CIH330Z-TK and ISL60002DIH330Z-TK are available in Cut Tape (CT) & Digi-Reel format. MAX6063AEUR+T and MAX6103EUR+T are available in Cut Tape (CT) & Digi-Reel format. MAX6063BEUR+T is available in Tape & Reel (TR). Packaging selection should align with production volume and handling requirements.

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