ZXRE125DR Equivalent & Substitute Parts

Part Overview

The ZXRE125DR is a shunt voltage reference IC manufactured by Diodes Incorporated, designed to provide a fixed 1.22V output with ±1% tolerance. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The ZXRE125DR operates in the TO-92 through-hole package and is suitable for applications requiring precision voltage reference functionality in legacy or retrofit scenarios.

Substiute Parts

ZXRE125DR

Diodes IncorporatedIn Stock: 931ZXRE125DR Datasheet

Current PartRFQ

ZXRE125DFTA

Diodes IncorporatedIn Stock: 9109ZXRE125DFTA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ZXRE125DR is determined by electrical parameter equivalence across the following criteria:

Electrical Equivalence Requirements:

• Fixed output voltage of 1.22V
• Output current capability of 20 mA
• Tolerance specification of ±1%
• Temperature coefficient of 75 ppm/°C
• Noise performance of 60 µVrms (10Hz to 10kHz)
• Cathode current of 8 µA
• Operating temperature range of -40°C to 85°C

Mechanical Compatibility:

• Shunt reference type architecture
• Three-terminal configuration

The ZXRE125DFTA qualifies as a direct electrical substitute, maintaining identical electrical specifications while offering an active product status and surface-mount packaging option. Both parts share the same base product number (ZXRE125) and are manufactured by Diodes Incorporated.

Parameter Comparison

Engineering Selection Recommendations

For Through-Hole Applications: The ZXRE125DR remains the specified component for existing through-hole PCB designs. However, due to obsolete status, long-term availability is not guaranteed. Designs should be evaluated for migration to surface-mount alternatives where feasible.

For New Designs and Production: The ZXRE125DFTA is the recommended selection, offering identical electrical performance with active product status and ROHS3 compliance. The SOT-23-3 surface-mount package provides improved manufacturing efficiency and supply chain continuity.

Compliance Considerations: Both parts maintain ROHS3 compliance and REACH unaffected status, suitable for regulated applications. Moisture sensitivity level (MSL) is 1 (Unlimited) for both variants, indicating no special storage or handling requirements.

Frequently Asked Questions (FAQ)

Q: Can ZXRE125DFTA replace ZXRE125DR in existing through-hole designs? A: Electrically, yes. The ZXRE125DFTA provides identical voltage reference performance. However, the SOT-23-3 surface-mount package requires PCB redesign and different assembly processes. Direct board-level substitution is not possible without layout modification.

Q: What is the primary reason for substitution? A: The ZXRE125DR is obsolete. The ZXRE125DFTA maintains all electrical specifications while offering active product status and improved supply availability.

Q: Are there any performance differences between the two parts? A: No. Both parts deliver 1.22V fixed output, ±1% tolerance, 75 ppm/°C temperature coefficient, and 60 µVrms noise performance. Differences are limited to package type and product lifecycle status.

Q: What are the compliance certifications for both parts? A: Both ZXRE125DR and ZXRE125DFTA are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with HTSUS code 8542.39.0001.

Q: Is PCB redesign required to use ZXRE125DFTA? A: Yes, if replacing ZXRE125DR in existing designs. The transition from TO-92-3 through-hole to SOT-23-3 surface-mount requires footprint modification and assembly process changes.

Q: What is the moisture sensitivity level for these parts? A: Both parts have MSL 1 (Unlimited), indicating no moisture sensitivity concerns and no special storage requirements.