TL317CD Equivalent & Substitute Parts

Part Overview

The TL317CD is a linear voltage regulator IC from Texas Instruments designed for positive adjustable output applications. It delivers 100mA output current with an adjustable voltage range from 1.2V to 32V, supporting input voltages up to 38V. The device is housed in an 8-SOIC surface mount package and includes over-current and over-temperature protection features.

The TL317CD is designated as Last Time Buy, indicating end-of-life status. Identifying equivalent substitute parts is essential for design continuity and long-term supply chain planning.

Substiute Parts

TL317CD

Texas InstrumentsIn Stock: 6520TL317CD Datasheet

Current PartRFQ

LM317LCDR

Texas InstrumentsIn Stock: 2782LM317LCDR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TL317CD is determined by strict equivalence across the following critical parameters:

• Output configuration (Positive)
• Output type (Adjustable)
• Number of regulators (1)
• Voltage specifications: Input Max 38V, Output range 1.2V to 32V
• Output current rating (100mA)
• Package type (8-SOIC)
• Operating temperature range (0°C ~ 125°C)
• Compliance certifications (ROHS3, REACH Unaffected)

The LM317LCDR meets all these criteria and is classified as the manufacturer-recommended substitute. Both devices share identical electrical specifications and mechanical compatibility, enabling direct replacement in existing designs.

Parameter Comparison

Engineering Selection Recommendations

The LM317LCDR is the direct equivalent substitute for the TL317CD. Both devices are manufactured by Texas Instruments and maintain identical electrical and mechanical specifications across all critical parameters. The LM317LCDR carries Active product status, ensuring continued availability and supply chain stability compared to the TL317CD's Last Time Buy designation.

Both parts comply with ROHS3 and REACH requirements, maintaining regulatory compliance in end applications. The LM317LCDR provides additional short-circuit protection beyond the TL317CD's feature set, offering enhanced reliability without compromising compatibility.

Pin-for-pin compatibility and identical package geometry enable direct PCB-level substitution without design modification.

Frequently Asked Questions (FAQ)

Q: Can the LM317LCDR replace the TL317CD in existing designs?

A: Yes. The LM317LCDR is pin-for-pin compatible with the TL317CD and maintains identical electrical specifications across voltage, current, and thermal operating ranges. No circuit modifications are required.

Q: What is the difference between TL317CD and LM317LCDR?

A: Both devices are functionally equivalent linear voltage regulators from Texas Instruments. The primary difference is product status: TL317CD is Last Time Buy (end-of-life), while LM317LCDR is Active. The LM317LCDR includes short-circuit protection as an additional feature.

Q: Are the packages identical?

A: Yes. Both parts use the 8-SOIC (0.154", 3.90mm Width) surface mount package with identical pinout and mechanical dimensions.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the TL317CD and LM317LCDR are ROHS3 Compliant and REACH Unaffected, with MSL rating of 1 (Unlimited).

Q: What is the output current rating for both devices?

A: Both devices deliver 100mA maximum output current with adjustable voltage output from 1.2V to 32V.

Q: Can I use LM317LCDR in applications requiring the TL317CD?

A: Yes. The LM317LCDR is the manufacturer-recommended substitute and is suitable for all applications designed for the TL317CD.