LM4132AMFX-3.3 Equivalent & Substitute Parts

Part Overview

The LM4132AMFX-3.3 is a series voltage reference IC from Texas Instruments, delivering a fixed 3.3V output with ±0.05% tolerance in a SOT-23-5 surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The LM4132AMFX-3.3 serves applications requiring precision voltage references with low noise and stable temperature performance across industrial temperature ranges.

Substiute Parts

LM4132AMFX-3.3

Texas InstrumentsIn Stock: 9487LM4132AMFX-3.3 Datasheet

Current PartRFQ

LM4132AMFX-3.3/NOPB

Texas InstrumentsIn Stock: 2589LM4132AMFX-3.3/NOPB Datasheet

DirectRFQ

LM4132AMF-3.3/NOPB

Texas InstrumentsIn Stock: 16393LM4132AMF-3.3/NOPB Datasheet

Parametric EquivalentRFQ

MAX6037AAUK33+T

Analog Devices Inc./Maxim IntegratedIn Stock: 3575MAX6037AAUK33+T Datasheet

MFR RecommendedRFQ

MAX6037BAUK33+T

Analog Devices Inc./Maxim IntegratedIn Stock: 1044MAX6037BAUK33+T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM4132AMFX-3.3 is determined by the following critical parameters:

Primary Substitution Criteria:

• Fixed output voltage of 3.3V
• SOT-23-5 package compatibility
• Surface mount mounting type
• Operating temperature range of -40°C to 125°C
• Input voltage range of 3.7V to 5.5V or compatible range

Substitution Categories:

Direct Manufacturer Equivalent: LM4132AMFX-3.3/NOPB maintains identical electrical specifications and packaging. This part differs only in product status (Active vs. Obsolete) and RoHS compliance (ROHS3 Compliant vs. Non-Compliant), making it a direct replacement with improved compliance status.

Parametric Equivalent: LM4132AMF-3.3/NOPB is functionally equivalent with identical electrical parameters and package type. The difference lies in packaging format (Cut Tape & Digi-Reel vs. standard packaging), which does not affect electrical performance or PCB compatibility.

Manufacturer Recommended Alternatives: MAX6037AAUK33+T and MAX6037BAUK33+T are Analog Devices Inc./Maxim Integrated parts with the same 3.3V fixed output and SOT-23-5 package. These parts differ in tolerance specifications (±0.2% and ±0.3% respectively versus ±0.05%), output current capability (5 mA versus 20 mA), and temperature coefficient performance. These are suitable where the tighter tolerance and higher output current of the LM4132 are not required.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Preferred): Select LM4132AMFX-3.3/NOPB or LM4132AMF-3.3/NOPB. Both maintain identical electrical specifications and package compatibility with the obsolete LM4132AMFX-3.3. These parts are Active status and ROHS3 Compliant, providing improved supply chain availability and regulatory compliance. The choice between these two depends on packaging requirements: Tape & Reel (TR) for LM4132AMFX-3.3/NOPB or Cut Tape & Digi-Reel for LM4132AMF-3.3/NOPB.

For Applications with Relaxed Tolerance Requirements: MAX6037AAUK33+T and MAX6037BAUK33+T are suitable alternatives when output current requirements do not exceed 5 mA and tolerance specifications of ±0.2% or ±0.3% are acceptable. These parts offer lower noise performance (19 µVp-p versus 310 µVp-p) and are from an established manufacturer with Active product status and ROHS3 compliance. Note that supply current is higher (275 µA versus 100 µA), which may impact power budget calculations.

Compliance Considerations: The original LM4132AMFX-3.3 is RoHS Non-Compliant. All recommended substitutes are ROHS3 Compliant, supporting modern procurement and environmental regulations.

Frequently Asked Questions (FAQ)

Q: Can I use MAX6037AAUK33+T as a direct replacement for LM4132AMFX-3.3?

A: MAX6037AAUK33+T is electrically compatible in terms of output voltage and package type, but differs in key specifications. The MAX6037AAUK33+T provides only 5 mA output current versus the LM4132's 20 mA, and has ±0.2% tolerance versus ±0.05%. Use this part only if your application requires 5 mA or less output current and can tolerate the wider tolerance specification.

Q: What is the difference between LM4132AMFX-3.3/NOPB and LM4132AMF-3.3/NOPB?

A: Both parts are electrically identical with the same tolerance (±0.05%), output current (20 mA), and temperature coefficient (20 ppm/°C). The difference is packaging format: LM4132AMFX-3.3/NOPB is supplied in Tape & Reel (TR), while LM4132AMF-3.3/NOPB is supplied in Cut Tape & Digi-Reel. Both are compatible with standard PCB assembly processes.

Q: Why is the LM4132AMFX-3.3 marked as obsolete?

A: The original part is classified as obsolete, which typically indicates end-of-life status from the manufacturer. Direct equivalents LM4132AMFX-3.3/NOPB and LM4132AMF-3.3/NOPB are Active status parts with identical specifications, providing continued design support and supply availability.

Q: Are all substitute parts RoHS compliant?

A: Yes. All recommended substitutes (LM4132AMFX-3.3/NOPB, LM4132AMF-3.3/NOPB, MAX6037AAUK33+T, and MAX6037BAUK33+T) are ROHS3 Compliant. The original LM4132AMFX-3.3 is RoHS Non-Compliant.

Q: What is the impact of higher supply current in MAX6037 parts?

A: MAX6037AAUK33+T and MAX6037BAUK33+T draw 275 µA supply current compared to 100 µA for LM4132 parts. In battery-powered or low-power applications, this 175 µA difference may be significant. Verify power budget requirements before selecting these alternatives.

Q: Can I mix different substitute parts in the same design?

A: All recommended substitutes are pin-compatible in SOT-23-5 packages and can be used interchangeably from a PCB layout perspective. However, verify that your circuit design accommodates the electrical differences, particularly output current capability and tolerance specifications, before mixing parts in production.