TL431ACDCKT Equivalent & Substitute Parts

Part Overview

The TL431ACDCKT is a shunt voltage reference IC manufactured by Texas Instruments, designed for precision voltage regulation and reference applications in power management circuits. This adjustable reference device operates across a 2.495V to 36V output range with ±1% tolerance and supports 100 mA output current. The part is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. Suitable alternatives maintain the core TL431 architecture while offering improved availability and extended operating temperature ranges.

Substiute Parts

TL431ACDCKT

Texas InstrumentsIn Stock: 937TL431ACDCKT Datasheet

Current PartRFQ

TL431ACCT

STMicroelectronicsIn Stock: 51179TL431ACCT Datasheet

DirectRFQ

TL431AICT

STMicroelectronicsIn Stock: 21234TL431AICT Datasheet

MFR RecommendedRFQ

TL431CCT

STMicroelectronicsIn Stock: 6738TL431CCT Datasheet

MFR RecommendedRFQ

TL431ICT

STMicroelectronicsIn Stock: 24192TL431ICT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TL431ACDCKT is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Reference Type: Shunt (all substitutes maintain this architecture)
• Output Type: Adjustable (all substitutes provide adjustable output)
• Voltage Range: 2.495V to 36V output capability
• Current - Output: 100 mA minimum
• Tolerance: ±1% or tighter (±2.21% tolerance represents a relaxation of this specification)
• Mounting Type: Surface Mount

Package Compatibility:

• All substitutes use SOT-323-6L package, which is mechanically and electrically compatible with the SC-70-6 package footprint

Compliance Requirements:

• RoHS3 Compliant
• REACH Unaffected
• MSL Level 1

Substitutes are grouped into two categories based on tolerance specification: direct equivalents maintaining ±1% tolerance (TL431ACCT, TL431AICT) and functional alternatives with relaxed ±2.21% tolerance (TL431CCT, TL431ICT).

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (±1% Tolerance):

TL431ACCT and TL431AICT are direct functional equivalents of the TL431ACDCKT, maintaining the ±1% tolerance specification. Both parts are manufactured by STMicroelectronics and carry active product status, ensuring long-term availability. TL431AICT provides extended operating temperature range (-40°C to 105°C) compared to the standard 0°C to 70°C range, making it suitable for applications requiring wider temperature performance. Both parts are ROHS3 compliant and MSL Level 1 rated.

Functional Alternatives (±2.21% Tolerance):

TL431CCT and TL431ICT offer relaxed tolerance specifications (±2.21%) while maintaining all other electrical and mechanical parameters. These parts are appropriate for applications where tighter tolerance is not a design requirement. TL431ICT extends the operating temperature range to -40°C to 105°C. Both alternatives are active products with full compliance certifications.

Selection Criteria:

For applications requiring ±1% tolerance performance, select TL431ACCT for standard temperature operation or TL431AICT for extended temperature range. For applications tolerating ±2.21% tolerance, TL431CCT and TL431ICT provide equivalent functionality with active product status. All substitutes maintain the 100 mA output current, 2.495V to 36V output range, and SOT-323-6L package compatibility.

Frequently Asked Questions (FAQ)

Q: Can TL431ACCT directly replace TL431ACDCKT?

A: Yes. TL431ACCT maintains identical electrical specifications including ±1% tolerance, 100 mA output current, and 2.495V to 36V output range. The SOT-323-6L package is mechanically and electrically compatible with the SC-70-6 package. Both operate across 0°C to 70°C temperature range.

Q: What is the difference between TL431AICT and TL431ACCT?

A: Both maintain ±1% tolerance and 100 mA output current. TL431AICT extends the operating temperature range to -40°C to 105°C and specifies 700 µA cathode current versus 600 µA for TL431ACCT. Select TL431AICT for applications requiring extended temperature performance.

Q: Can I use TL431CCT or TL431ICT as substitutes?

A: TL431CCT and TL431ICT are functional alternatives with relaxed ±2.21% tolerance specifications. Use these parts only if your application design permits tolerance values outside ±1%. Both maintain 100 mA output current and 2.495V to 36V output range.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All substitute parts (TL431ACCT, TL431AICT, TL431CCT, TL431ICT) are ROHS3 compliant and REACH unaffected, matching the compliance status of the TL431ACDCKT.

Q: What is the package compatibility between SC-70-6 and SOT-323-6L?

A: SC-70-6 and SOT-323-6L are equivalent 6-pin surface mount packages. All substitute parts use SOT-323-6L packaging, which provides identical PCB footprint and pin configuration compatibility with the original SC-70-6 package.

Q: Which substitute offers the best availability?

A: TL431ACCT and TL431AICT are manufactured by STMicroelectronics with active product status, ensuring long-term availability. Both parts carry significantly higher inventory levels compared to the obsolete TL431ACDCKT.