LM385M3-1.2 Equivalent & Substitute Parts

Part Overview

The LM385M3-1.2 is a shunt voltage reference IC manufactured by Texas Instruments, designed for precision voltage reference applications requiring fixed 1.235V output. This component operates as a shunt regulator with 20 mA output capability and is housed in a SOT-23-3 surface mount package. The main part number LM385M3-1.2 carries a Last Time Buy product status, indicating discontinued production. Identifying parametric equivalents and active substitutes is essential for ongoing design support and procurement continuity.

Substiute Parts

LM385M3-1.2

Texas InstrumentsIn Stock: 17782LM385M3-1.2 Datasheet

Current PartRFQ

LM385M3-1.2/NOPB

Texas InstrumentsIn Stock: 19498LM385M3-1.2/NOPB Datasheet

Parametric EquivalentRFQ

LM385M3X-1.2/NOPB

Texas InstrumentsIn Stock: 61026LM385M3X-1.2/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM385M3-1.2 is determined by strict parametric matching across the following critical criteria:

• Reference Type: Shunt
• Output Type: Fixed
• Voltage - Output (Min/Fixed): 1.235V
• Current - Output: 20 mA
• Tolerance: -2.43%, +2.02%
• Temperature Coefficient: 150ppm/°C
• Noise - 10Hz to 10kHz: 60µVrms
• Current - Cathode: 10 µA
• Operating Temperature: 0°C ~ 70°C (TA)
• Package / Case: TO-236-3, SC-59, SOT-23-3
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

All identified substitute parts match these parameters exactly, ensuring direct functional and mechanical compatibility without circuit redesign.

Parameter Comparison

Engineering Selection Recommendations

The LM385M3-1.2 is designated Last Time Buy status. Both LM385M3-1.2/NOPB and LM385M3X-1.2/NOPB are active production parts from Texas Instruments with identical electrical and mechanical specifications.

For new designs and ongoing procurement, LM385M3X-1.2/NOPB is the preferred selection due to higher current inventory availability (60,942 Pcs) compared to LM385M3-1.2/NOPB (19,400 Pcs). Both substitutes maintain full ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with standard manufacturing and storage conditions.

Frequently Asked Questions (FAQ)

Q: Can LM385M3-1.2/NOPB and LM385M3X-1.2/NOPB be used interchangeably with LM385M3-1.2?

A: Yes. All three part numbers share identical electrical parameters (1.235V fixed output, 20 mA current, -2.43%/+2.02% tolerance, 150ppm/°C temperature coefficient) and mechanical specifications (SOT-23-3 package, surface mount). Direct substitution requires no circuit modifications.

Q: What is the difference between the /NOPB suffix variants?

A: The /NOPB designation indicates lead-free, RoHS-compliant packaging. This is a manufacturing and compliance designation only; electrical and functional performance remains identical across all three part numbers.

Q: Why is the original LM385M3-1.2 marked Last Time Buy?

A: Last Time Buy status indicates Texas Instruments has discontinued production of this specific part number variant. Active substitutes with identical specifications are available to ensure design continuity.

Q: Are there any package or pinout differences between these parts?

A: No. All three part numbers use the identical TO-236-3 (SOT-23-3) package with the same pinout and mechanical dimensions. PCB layout and assembly processes require no modification.

Q: What compliance certifications apply to these substitutes?

A: All three part numbers are ROHS3 compliant, REACH unaffected, and carry MSL Level 1 (unlimited moisture sensitivity). ECCN classification is EAR99 for all variants.