LM4132DMFX-4.1 Equivalent & Substitute Parts

Part Overview

The LM4132DMFX-4.1 is a Series Voltage Reference IC manufactured by Texas Instruments, designed to provide a fixed 4.096V output with ±0.4% tolerance. This component operates as a precision voltage reference in power management applications, delivering 20 mA output current with low noise characteristics suitable for analog signal conditioning and precision measurement circuits.

The main part number LM4132DMFX-4.1 carries an Obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and access components with active manufacturing status and current compliance certifications.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	4.096V
Output Current	20 mA
Voltage Tolerance	±0.4%
Temperature Coefficient	20 ppm/°C
Noise (0.1Hz to 10Hz)	350 µVp-p
Input Voltage Range	4.496V ~ 5.5V
Supply Current	100 µA
Operating Temperature Range	-40°C ~ 125°C (TJ)
Package Type	SOT-23-5 (SC-74A, SOT-753)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitute parts for the LM4132DMFX-4.1 are identified based on electrical and mechanical parameter equivalence within the LM4132 product family. The substitution criteria are strictly defined by the following parameters:

Fixed output voltage of 4.096V
Output current capability of 20 mA
Voltage tolerance of ±0.4%
Temperature coefficient of 20 ppm/°C
Noise specification of 350 µVp-p (0.1Hz to 10Hz)
Input voltage range of 4.496V ~ 5.5V
Supply current of 100 µA
Operating temperature range of -40°C ~ 125°C
SOT-23-5 package configuration
Surface mount technology

Parts meeting all these electrical and mechanical specifications are classified as parametric equivalents and direct manufacturer substitutes. Packaging format variations (bulk versus tape & reel) do not affect functional equivalence.

Parameter Comparison

Parameter	LM4132DMFX-4.1	LM4132DMFX-4.1/NOPB	LM4132DMF-4.1/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments
Output Voltage	4.096V	4.096V	4.096V
Output Current	20 mA	20 mA	20 mA
Tolerance	±0.4%	±0.4%	±0.4%
Temperature Coefficient	20 ppm/°C	20 ppm/°C	20 ppm/°C
Noise (0.1Hz to 10Hz)	350 µVp-p	350 µVp-p	350 µVp-p
Input Voltage Range	4.496V ~ 5.5V	4.496V ~ 5.5V	4.496V ~ 5.5V
Supply Current	100 µA	100 µA	100 µA
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package	SOT-23-5	SOT-23-5	SOT-23-5
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Format	Bulk	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

Both LM4132DMFX-4.1/NOPB and LM4132DMF-4.1/NOPB are suitable substitutes for the obsolete LM4132DMFX-4.1. Selection between these alternatives should be based on the following factors:

Product Status: LM4132DMFX-4.1/NOPB and LM4132DMF-4.1/NOPB both carry Active product status, ensuring continued manufacturing support and availability.

Compliance Certifications: Both substitute parts are ROHS3 Compliant, addressing environmental and regulatory requirements. The original part is RoHS non-compliant, making the substitutes preferable for applications subject to RoHS directives.

Packaging and Supply Chain: LM4132DMFX-4.1/NOPB is available in Tape & Reel format with 800 units in stock. LM4132DMF-4.1/NOPB is also available in Tape & Reel format with 3753 units in stock, offering greater inventory availability for high-volume procurement.

Electrical Equivalence: All three parts maintain identical electrical specifications across output voltage, current, tolerance, temperature coefficient, noise, input voltage range, supply current, and operating temperature range. Functional performance in circuit applications is equivalent.

Frequently Asked Questions (FAQ)

Q: Can LM4132DMFX-4.1/NOPB directly replace LM4132DMFX-4.1 in existing designs?

A: Yes. Both parts are electrically and mechanically identical. The primary differences are product status (Active versus Obsolete) and RoHS compliance (ROHS3 Compliant versus non-compliant). The /NOPB designation indicates lead-free plating, which is compatible with standard reflow soldering processes.

Q: What is the difference between LM4132DMFX-4.1/NOPB and LM4132DMF-4.1/NOPB?

A: Both parts are parametric equivalents with identical electrical specifications and SOT-23-5 packaging. The difference lies in the specific part number suffix, which may indicate minor manufacturing variations or packaging batch designations. Both are manufactured by Texas Instruments and carry Active product status with ROHS3 compliance.

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

A: No. All three parts use the SOT-23-5 package (SC-74A, SOT-753) with identical pinout and mechanical dimensions. Surface mount assembly processes require no modification.

Q: Why is the original LM4132DMFX-4.1 marked as Obsolete?

A: Product obsolescence typically occurs when manufacturers transition to newer product lines or consolidate part numbers. The substitute parts LM4132DMFX-4.1/NOPB and LM4132DMF-4.1/NOPB represent the current active manufacturing alternatives within the LM4132 family.

Q: Does RoHS compliance affect circuit performance?

A: No. RoHS compliance relates to material composition and environmental standards, not electrical performance. Both RoHS-compliant and non-compliant versions deliver identical voltage reference specifications and operating characteristics.

Q: Which substitute should be selected for new designs?

A: Either LM4132DMFX-4.1/NOPB or LM4132DMF-4.1/NOPB is appropriate for new designs. Selection may be based on inventory availability, supplier preference, or existing supply chain relationships. LM4132DMF-4.1/NOPB offers higher stock availability (3753 units versus 800 units).

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