TL431CDMR2G Equivalent & Substitute Parts

Part Overview

The TL431CDMR2G is a shunt voltage reference IC manufactured by onsemi, designed for precision voltage regulation applications. This adjustable reference device operates across a 2.495V to 36V output range with ±2.2% tolerance and supports 100 mA output current. The device is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and procurement planning.

Substiute Parts

TL431CDMR2G

onsemiIn Stock: 4971TL431CDMR2G Datasheet

Current PartRFQ

TL431ACDMR2G

onsemiIn Stock: 5508TL431ACDMR2G Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TL431CDMR2G is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Reference Type: Shunt
• Output Type: Adjustable
• Voltage - Output (Min/Fixed): 2.495V
• Voltage - Output (Max): 36 V
• Current - Output: 100 mA
• Package / Case: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
• Mounting Type: Surface Mount
• Operating Temperature: 0°C ~ 70°C (TA)

Allowable Variation:

• Tolerance: ±2.2% (main part) to ±1% (substitute) — tighter tolerance is acceptable
• Temperature Coefficient: 50ppm/°C Typical (no variation in provided data)
• Current - Cathode: 1 mA (consistent across parts)

The TL431ACDMR2G qualifies as a direct substitute based on identical electrical specifications, package configuration, and operating parameters. The improved tolerance specification (±1% versus ±2.2%) represents enhanced performance capability without compromising compatibility.

Parameter Comparison

Engineering Selection Recommendations

Both the TL431CDMR2G and TL431ACDMR2G are classified as obsolete products. Selection between these parts should be based on the following criteria:

Compliance & Regulatory: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying current environmental and regulatory requirements for new designs and legacy system support.

Product Availability: The TL431ACDMR2G currently maintains higher inventory levels (5400 Pcs) compared to the TL431CDMR2G (4949 Pcs), providing improved procurement reliability for ongoing production requirements.

Performance Specification: The TL431ACDMR2G offers tighter tolerance specification (±1%) relative to the main part (±2.2%), delivering improved voltage reference accuracy without modification to circuit design or layout.

Electrical Compatibility: Identical output voltage range, current capacity, temperature coefficient, and operating temperature range ensure direct functional equivalence in existing circuit implementations.

Frequently Asked Questions (FAQ)

Q: Can the TL431ACDMR2G directly replace the TL431CDMR2G in existing designs?

A: Yes. Both devices share identical electrical specifications for output voltage range (2.495V to 36V), output current (100 mA), operating temperature (0°C to 70°C), and package configuration (8-MSOP). The TL431ACDMR2G provides improved tolerance performance without requiring circuit modification.

Q: What is the significance of the tolerance difference between these parts?

A: The TL431CDMR2G specifies ±2.2% tolerance, while the TL431ACDMR2G specifies ±1% tolerance. This represents tighter voltage reference accuracy in the substitute part. Applications requiring higher precision voltage regulation benefit from the improved specification.

Q: Are both parts suitable for new product designs?

A: Both parts carry obsolete product status. For new designs, evaluation of current-generation shunt voltage reference alternatives from onsemi or other manufacturers is recommended based on specific application requirements and long-term availability planning.

Q: Do package and mounting specifications differ between these parts?

A: No. Both the TL431CDMR2G and TL431ACDMR2G utilize identical 8-MSOP surface mount packaging with 0.118" width (3.00mm). PCB layout and footprint designs are directly compatible.

Q: Are there compliance or environmental differences between these parts?

A: No. Both parts maintain ROHS3 compliance, REACH unaffected status, and identical moisture sensitivity level (MSL 1 - Unlimited), ensuring equivalent environmental and regulatory compliance for system integration.