LM4128DMF-4.1 Equivalent & Substitute Parts

Part Overview

The LM4128DMF-4.1 is a Series Voltage Reference IC with fixed 4.096V output, designed for precision power management applications. Manufactured by Texas Instruments in SOT-23-5 surface mount packaging, this component delivers ±1% tolerance with 20 mA output current capability. The main part is currently listed as obsolete, making equivalent substitute parts necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Reference Type	Series
Output Type	Fixed
Voltage - Output (Min/Fixed)	4.096V
Current - Output	20 mA
Tolerance	±1%
Temperature Coefficient	100ppm/°C
Noise - 0.1Hz to 10Hz	350µVp-p
Voltage - Input	4.496V ~ 5.5V
Current - Supply	100µA
Operating Temperature	-40°C ~ 125°C (TJ)
Package / Case	SC-74A, SOT-753
Supplier Device Package	SOT-23-5
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitute parts for the LM4128DMF-4.1 are qualified based on identical electrical and mechanical parameters across all critical specifications. The substitution logic is based on the following key parameters that must match exactly:

Fixed output voltage of 4.096V
Output current of 20 mA
Tolerance of ±1%
Temperature coefficient of 100ppm/°C
Input voltage range of 4.496V ~ 5.5V
Supply current of 100µA
Operating temperature range of -40°C ~ 125°C
SOT-23-5 package configuration
Surface mount mounting type

All substitute parts listed maintain these electrical and mechanical specifications, ensuring functional equivalence in circuit applications.

Parameter Comparison

Parameter	LM4128DMF-4.1	LM4128DMF-4.1/NOPB	LM4128DMFX-4.1/NOPB	LM4128DQ1MF4.1/NOPB	LM4128DQ1MFX4.1/NOPB
Manufacturer	Texas Instruments	National Semiconductor	Texas Instruments	National Semiconductor	Texas Instruments
Product Status	Obsolete	Active	Active	Active	Active
Voltage - Output (Min/Fixed)	4.096V	4.096V	4.096V	4.096V	4.096V
Current - Output	20 mA	20 mA	20 mA	20 mA	20 mA
Tolerance	±1%	±1%	±1%	±1%	±1%
Temperature Coefficient	100ppm/°C	100ppm/°C	100ppm/°C	100ppm/°C	100ppm/°C
Noise - 0.1Hz to 10Hz	350µVp-p	350µVp-p	350µVp-p	350µVp-p	350µVp-p
Voltage - Input	4.496V ~ 5.5V	4.496V ~ 5.5V	4.496V ~ 5.5V	4.496V ~ 5.5V	4.496V ~ 5.5V
Current - Supply	100µA	100µA	100µA	100µA	100µA
Operating Temperature	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)
Package / Case	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753
Supplier Device Package	SOT-23-5	SOT-23-5	SOT-23-5	SOT-23-5	SOT-23-5
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Packaging	-	Bulk	Tape & Reel (TR)	Bulk	Tape & Reel (TR)
RoHS Status	RoHS non-compliant	-	ROHS3 Compliant	-	ROHS3 Compliant
Grade	-	-	-	Automotive	Automotive
Qualification	-	-	-	AEC-Q100	AEC-Q100

Engineering Selection Recommendations

All substitute parts maintain identical electrical specifications and package configuration with the obsolete LM4128DMF-4.1. Selection among available substitutes depends on application requirements and supply chain considerations:

LM4128DMF-4.1/NOPB and LM4128DMFX-4.1/NOPB are active status parts from Texas Instruments and National Semiconductor, with the latter offering ROHS3 compliance. Packaging differs between bulk and tape & reel formats.

LM4128DQ1MF4.1/NOPB and LM4128DQ1MFX4.1/NOPB are automotive-grade variants qualified to AEC-Q100 standard, suitable for automotive applications. The DMFX variant includes ROHS3 compliance and tape & reel packaging.

For non-automotive applications without RoHS requirements, LM4128DMF-4.1/NOPB provides direct substitution. For RoHS-compliant designs, LM4128DMFX-4.1/NOPB is appropriate. For automotive applications, LM4128DQ1MFX4.1/NOPB combines automotive qualification with RoHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can LM4128DQ1MF4.1/NOPB be used in non-automotive applications?

A: Yes. The automotive-grade LM4128DQ1MF4.1/NOPB meets all electrical and mechanical specifications of the standard LM4128DMF-4.1. Automotive qualification indicates enhanced reliability testing but does not restrict use in non-automotive circuits.

Q: What is the difference between bulk and tape & reel packaging?

A: Bulk packaging is suitable for small-quantity applications and manual assembly. Tape & reel packaging is designed for automated pick-and-place assembly processes. Electrical performance is identical; packaging choice depends on manufacturing process requirements.

Q: Are all substitutes pin-compatible with the original LM4128DMF-4.1?

A: Yes. All substitute parts use the SOT-23-5 package configuration with identical pinout and mechanical dimensions, ensuring direct board-level compatibility.

Q: Which substitute offers the best compliance profile?

A: LM4128DQ1MFX4.1/NOPB combines ROHS3 compliance with AEC-Q100 automotive qualification and active product status. LM4128DMFX-4.1/NOPB provides ROHS3 compliance for non-automotive applications.

Q: Is the temperature coefficient specification identical across all parts?

A: Yes. All substitute parts maintain 100ppm/°C temperature coefficient across the -40°C to 125°C operating range, ensuring equivalent thermal performance.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message