LM4040C82ILP Equivalent & Substitute Parts

Part Overview

The LM4040C82ILP is a shunt voltage reference IC manufactured by Texas Instruments, delivering a fixed 8.192V output with ±0.5% tolerance. This component functions as a precision voltage reference in power management applications. The part is currently in Last Time Buy status, indicating discontinued production. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for ongoing production and maintenance applications.

Substiute Parts

LM4040C82ILP

Texas InstrumentsIn Stock: 994LM4040C82ILP Datasheet

Current PartRFQ

LM4040C82IDBZR

Texas InstrumentsIn Stock: 21070LM4040C82IDBZR Datasheet

MFR RecommendedRFQ

LM4040C82ILP

Texas InstrumentsIn Stock: 994LM4040C82ILP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM4040C82ILP is determined by electrical parameter equivalence across the LM4040 base product family. The critical parameters governing substitutability are:

• Fixed output voltage of 8.192V
• Output current capability of 15 mA
• Tolerance specification of ±0.5%
• Temperature coefficient of 100ppm/°C
• Noise performance of 130µVrms (10Hz to 10kHz)
• Cathode current of 110 µA
• Operating temperature range of -40°C to 85°C

The LM4040C82IDBZR maintains identical electrical specifications while differing in packaging format and product status. Both parts share the same base product number (LM4040) and are manufactured by Texas Instruments under equivalent design parameters.

Parameter Comparison

Engineering Selection Recommendations

The LM4040C82IDBZR is the primary substitute for the LM4040C82ILP. Both parts maintain identical electrical specifications and regulatory compliance (ROHS3 Compliant, REACH Unaffected). The LM4040C82IDBZR is currently in Active product status with significantly higher inventory availability (20,989 pcs vs. 924 pcs), making it the preferred choice for new designs and ongoing production requirements.

The primary distinction between these parts is packaging format: the main part uses through-hole TO-92-3 mounting, while the substitute employs surface-mount SOT-23-3 packaging. This difference requires PCB layout modification but does not affect electrical performance or functional compatibility within the circuit design.

Frequently Asked Questions (FAQ)

Q: Can the LM4040C82IDBZR directly replace the LM4040C82ILP in existing designs?

A: Electrical substitution is complete. However, the packaging change from TO-92-3 (through-hole) to SOT-23-3 (surface-mount) requires PCB redesign. Pin configuration and electrical function remain identical.

Q: What are the key parameters that must match for substitution?

A: Output voltage (8.192V), output current (15 mA), tolerance (±0.5%), temperature coefficient (100ppm/°C), and operating temperature range (-40°C to 85°C) must remain constant. All substitute parts maintain these specifications.

Q: Why is the LM4040C82ILP in Last Time Buy status?

A: Last Time Buy status indicates Texas Instruments has discontinued this product line. The LM4040C82IDBZR in Active status represents the current manufacturing equivalent.

Q: Are there compliance differences between the two parts?

A: Both parts are ROHS3 Compliant and REACH Unaffected. Regulatory compliance is equivalent.

Q: What inventory considerations should guide part selection?

A: The LM4040C82IDBZR has substantially higher stock availability (20,989 pcs) compared to the main part (924 pcs). For production continuity, the substitute is the recommended choice.

Q: Does the SOT-23-3 package affect circuit performance?

A: No. The package change is mechanical only. Electrical performance, noise characteristics, and temperature stability remain identical to the through-hole version.