LM4040D82ILP Equivalent & Substitute Parts

Part Overview

The LM4040D82ILP is a shunt voltage reference IC manufactured by Texas Instruments, providing a fixed 8.192V output with ±1% tolerance. This through-hole component operates across the industrial temperature range of -40°C to 85°C and is classified as Last Time Buy, indicating end-of-life status. Due to this product status, identifying functionally equivalent alternatives is essential for design continuity and long-term supply chain planning.

Substiute Parts

LM4040D82ILP

Texas InstrumentsIn Stock: 1884LM4040D82ILP Datasheet

Current PartRFQ

LM4040C82IDBZR

Texas InstrumentsIn Stock: 21070LM4040C82IDBZR Datasheet

MFR RecommendedRFQ

LM4040D82ILP

Texas InstrumentsIn Stock: 1884LM4040D82ILP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM4040D82ILP is determined by the following critical parameters: reference type (shunt), fixed output voltage (8.192V), output current capability (15 mA), and operating temperature range (-40°C to 85°C). The LM4040 base product family maintains these core electrical specifications across different tolerance grades and package options.

The LM4040C82IDBZR qualifies as a manufacturer-recommended substitute despite packaging differences. Both parts share identical output voltage, current rating, and temperature range. The substitute offers improved tolerance (±0.5% versus ±1%) and lower temperature coefficient (100 ppm/°C versus 150 ppm/°C), making it electrically superior. The primary distinction is the transition from through-hole TO-92-3 packaging to surface-mount SOT-23-3 packaging, which requires PCB layout modification.

Parameter Comparison

Engineering Selection Recommendations

The LM4040C82IDBZR is the appropriate substitute for the LM4040D82ILP based on product lifecycle status. The main part is designated Last Time Buy, whereas the substitute maintains Active status with significantly higher inventory availability (20,989 pcs versus 1,830 pcs). Both components are ROHS3 compliant and REACH unaffected, meeting equivalent regulatory requirements.

The substitute provides superior electrical performance with tighter tolerance (±0.5%) and lower temperature coefficient (100 ppm/°C), resulting in improved output voltage stability across temperature variations. The transition from through-hole to surface-mount packaging requires PCB redesign but is the standard migration path for this product family.

Frequently Asked Questions (FAQ)

Q: Can the LM4040C82IDBZR directly replace the LM4040D82ILP without circuit modification?

A: Electrical substitution is valid; the parts share identical output voltage (8.192V), current rating (15 mA), and operating temperature range. However, packaging differs fundamentally: TO-92-3 (through-hole) versus SOT-23-3 (surface-mount). PCB layout and footprint redesign is required.

Q: What are the tolerance differences between these parts?

A: The main part specifies ±1% tolerance, while the substitute offers ±0.5% tolerance. This means the substitute maintains tighter output voltage accuracy, reducing voltage deviation across the specified operating range.

Q: How do temperature coefficients affect long-term performance?

A: Temperature coefficient defines voltage drift per degree Celsius. The main part exhibits 150 ppm/°C drift, while the substitute exhibits 100 ppm/°C. Over a 125°C temperature span, the substitute produces approximately 6.25mV less drift compared to the main part, improving stability in temperature-sensitive applications.

Q: Are both parts compliant with current regulatory standards?

A: Yes. Both the LM4040D82ILP and LM4040C82IDBZR are ROHS3 compliant and REACH unaffected, meeting equivalent environmental and regulatory requirements.

Q: Why is the main part designated Last Time Buy?

A: Last Time Buy status indicates the manufacturer is discontinuing this product line. The LM4040C82IDBZR represents the active continuation of the LM4040 family and should be selected for new designs and long-term supply assurance.