LM4132AMFX-3.3/NOPB Equivalent & Substitute Parts

Part Overview

The LM4132AMFX-3.3/NOPB is a series voltage reference IC manufactured by Texas Instruments, classified as a Power Management (PMIC) component. This fixed 3.3V reference device operates with ±0.05% tolerance and delivers 20 mA output current in a SOT-23-5 surface mount package. The part is currently active in production status with 2500 units available in inventory. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to supply constraints, inventory availability, or design flexibility within specified parameter ranges.

Substiute Parts

LM4132AMFX-3.3/NOPB

Texas InstrumentsIn Stock: 2589LM4132AMFX-3.3/NOPB Datasheet

Current PartRFQ

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

Substitute parts for the LM4132AMFX-3.3/NOPB are qualified based on the following electrical and mechanical criteria:

Primary Substitution Criteria:

• Fixed output voltage of 3.3V
• Surface mount package compatibility (SOT-23-5 / SC-74A)
• Operating temperature range of -40°C ~ 125°C
• RoHS3 compliance and REACH unaffected status
• Active product status

Acceptable Parameter Variations: Substitutes may differ in tolerance (±0.05% to ±0.3%), output current capacity (5 mA to 20 mA), temperature coefficient (20 ppm/°C to 50 ppm/°C), and supply current (100 µA to 275 µA), provided the application requirements permit these variations. Input voltage range compatibility (4.6V ~ 5.5V to 3.7V ~ 5.5V) is acceptable for most applications.

Parameter Comparison

Engineering Selection Recommendations

LM4132AMF-3.3/NOPB (Parametric Equivalent): This Texas Instruments part is electrically identical to the main part number, differing only in packaging format (Cut Tape & Digi-Reel® versus Tape & Reel). Both maintain ±0.05% tolerance, 20 mA output current, and 20 ppm/°C temperature coefficient. Selection between these two is determined by procurement and assembly requirements rather than electrical performance. Inventory availability is significantly higher for this variant (16,300 units).

MAX6037AAUK33+T (Manufacturer Recommended): This Analog Devices Inc./Maxim Integrated part provides 3.3V fixed output in the same SOT-23-5 package with full operating temperature range compatibility. The ±0.2% tolerance and 25 ppm/°C temperature coefficient represent acceptable variations for applications where the LM4132 series is unavailable. Output current is reduced to 5 mA, which is suitable for reference applications with lower load requirements. Supply current increases to 275 µA.

MAX6037BAUK33+T (Manufacturer Recommended): This variant offers the same package and voltage output as MAX6037AAUK33+T with relaxed tolerance specification (±0.3%) and higher temperature coefficient (50 ppm/°C). Selection is appropriate for applications with less stringent accuracy requirements. Inventory availability is limited (993 units).

All substitute parts maintain RoHS3 compliance, REACH unaffected status, and active product status, ensuring regulatory and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can LM4132AMF-3.3/NOPB be used as a direct replacement for LM4132AMFX-3.3/NOPB?

A: Yes. Both parts are electrically identical with matching tolerance (±0.05%), output current (20 mA), and temperature coefficient (20 ppm/°C). The difference is packaging format: LM4132AMFX uses Tape & Reel, while LM4132AMF uses Cut Tape & Digi-Reel®. PCB assembly compatibility is identical for both.

Q: What are the key differences between Texas Instruments LM4132 and Maxim MAX6037 series?

A: The primary differences are output current capacity (LM4132: 20 mA versus MAX6037: 5 mA) and tolerance specifications (LM4132: ±0.05% versus MAX6037: ±0.2% to ±0.3%). Both maintain 3.3V fixed output and SOT-23-5 package compatibility. MAX6037 variants have higher supply current (275 µA versus 100 µA). Selection depends on application load requirements and accuracy specifications.

Q: Are all substitute parts compatible with the same PCB layout?

A: Yes. All listed parts use the SC-74A / SOT-753 package with identical pin configuration and footprint. No PCB redesign is required for substitution.

Q: What is the impact of tolerance differences on circuit performance?

A: The LM4132AMFX-3.3/NOPB provides ±0.05% tolerance, ensuring output voltage between 3.2983V and 3.3017V. MAX6037AAUK33+T tolerance of ±0.2% results in output range of 3.294V to 3.306V. MAX6037BAUK33+T tolerance of ±0.3% results in output range of 3.291V to 3.309V. Application circuits must accommodate these ranges or select parts accordingly.

Q: Can MAX6037 parts be used in high-current applications?

A: No. MAX6037 series is rated for 5 mA maximum output current, compared to LM4132's 20 mA. Applications requiring higher reference current must use LM4132 variants or implement external buffering circuits.

Q: Are there temperature measurement differences between parts?

A: LM4132 specifies operating temperature as -40°C ~ 125°C (TJ, junction temperature), while MAX6037 specifies -40°C ~ 125°C (TA, ambient temperature). Both cover the same functional range; measurement reference differs by definition.