LM4041CIM7-1.2 Equivalent & Substitute Parts

Part Overview

The LM4041CIM7-1.2 is a shunt voltage reference IC manufactured by Texas Instruments, designed for precision voltage regulation applications. This component delivers a fixed 1.225V output with ±0.5% tolerance and supports output currents up to 12 mA. The part is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	LM4041CIM7-1.2
Manufacturer	Texas Instruments
Reference Type	Shunt
Output Type	Fixed
Voltage - Output (Min/Fixed)	1.225V
Current - Output	12 mA
Tolerance	±0.5%
Temperature Coefficient	100ppm/°C
Noise - 10Hz to 10kHz	20µVrms
Current - Cathode	65 µA
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	5-TSSOP, SC-70-5, SOT-353
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution for the LM4041CIM7-1.2 is determined by the following critical parameters:

Output Voltage: 1.225V (fixed)
Output Current: 12 mA
Tolerance: ±0.5% (minimum acceptable)
Temperature Coefficient: 100ppm/°C
Package Type: SC-70-5 / SOT-353 compatible
Mounting: Surface Mount

Substitute parts are grouped into two categories:

Parametric Equivalents maintain identical electrical specifications and packaging, differing only in product status (Active vs. Obsolete) or packaging format (Tape & Reel vs. Cut Tape).

Manufacturer Recommended Alternatives offer improved specifications (lower tolerance, extended temperature range, enhanced noise performance) while maintaining core functional compatibility with the 1.225V output and 12 mA current rating.

Parameter Comparison

Part Number	Manufacturer	Voltage Output	Current Output	Tolerance	Temp Coeff	Noise (10Hz-10kHz)	Cathode Current	Temp Range	Package	Status	RoHS
LM4041CIM7-1.2	Texas Instruments	1.225V	12 mA	±0.5%	100ppm/°C	20µVrms	65 µA	-40 to 85°C	SC-70-5	Obsolete	Non-compliant
LM4041C12IDCKR	Texas Instruments	1.225V	12 mA	±0.5%	100ppm/°C	20µVrms	80 µA	-40 to 85°C	SC-70-5	Active	ROHS3 Compliant
LM4041CIM7-1.2/NOPB	Texas Instruments	1.225V	12 mA	±0.5%	100ppm/°C	20µVrms	65 µA	-40 to 85°C	SC-70-5	Active	ROHS3 Compliant
LM4041CIM7X-1.2/NOPB	Texas Instruments	1.225V	12 mA	±0.5%	100ppm/°C	20µVrms	65 µA	-40 to 85°C	SC-70-5	Active	ROHS3 Compliant
LM4041AECT-1.2	STMicroelectronics	1.225V	12 mA	±0.1%	100ppm/°C	60µVrms	50 µA	-40 to 125°C	SOT-323-5	Active	ROHS3 Compliant
LM4041AICT-1.2	STMicroelectronics	1.225V	12 mA	±0.1%	100ppm/°C	60µVrms	50 µA	-40 to 85°C	SOT-323-5	Active	ROHS3 Compliant
LM4041BECT-1.2	STMicroelectronics	1.225V	12 mA	±0.2%	100ppm/°C	60µVrms	50 µA	-40 to 125°C	SOT-323-5	Active	ROHS3 Compliant
LM4041BICT-1.2	STMicroelectronics	1.225V	12 mA	±0.2%	100ppm/°C	60µVrms	50 µA	-40 to 85°C	SOT-323-5	Active	ROHS3 Compliant
LM4041CECT-1.2	STMicroelectronics	1.225V	12 mA	±0.5%	100ppm/°C	60µVrms	50 µA	-40 to 125°C	SOT-323-5	Active	ROHS3 Compliant
LM4041CICT-1.2	STMicroelectronics	1.225V	12 mA	±0.5%	100ppm/°C	60µVrms	50 µA	-40 to 85°C	SOT-323-5	Active	ROHS3 Compliant
LM4041DECT-1.2	STMicroelectronics	1.225V	12 mA	±1%	100ppm/°C	60µVrms	50 µA	-40 to 125°C	SOT-323-5	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Parametric Equivalents (Recommended for Drop-In Replacement)

LM4041CIM7-1.2/NOPB and LM4041CIM7X-1.2/NOPB are direct functional equivalents with identical electrical specifications. Both are Active status parts with ROHS3 compliance, addressing the obsolescence and regulatory compliance issues of the original LM4041CIM7-1.2. LM4041CIM7-1.2/NOPB is available in Tape & Reel packaging with 18,300 units in stock. LM4041CIM7X-1.2/NOPB is available in Cut Tape & Digi-Reel format with 22,100 units in stock.

Texas Instruments Parametric Equivalent (Alternative Packaging)

LM4041C12IDCKR maintains identical electrical performance with Active status and ROHS3 compliance. This variant differs in cathode current specification (80 µA vs. 65 µA) and is supplied in Tape & Reel packaging with 1,341 units in stock.

STMicroelectronics Manufacturer Recommended Alternatives

STMicroelectronics LM4041 series parts offer improved specifications across tolerance and temperature range parameters. LM4041CECT-1.2 and LM4041CICT-1.2 maintain the ±0.5% tolerance specification while providing extended operating temperature to -40 to 125°C (CECT variant) or -40 to 85°C (CICT variant), with ROHS3 compliance. Both are Active status with substantial inventory availability (20,100 and 20,200 units respectively).

For applications requiring tighter tolerance specifications, LM4041AECT-1.2 and LM4041AICT-1.2 offer ±0.1% tolerance with extended temperature range support (AECT to 125°C). LM4041BECT-1.2 and LM4041BICT-1.2 provide ±0.2% tolerance as an intermediate option.

All STMicroelectronics alternatives use SOT-323-5 packaging, which is mechanically compatible with SC-70-5 footprints in standard PCB designs.

Frequently Asked Questions (FAQ)

Q: Can LM4041CIM7-1.2/NOPB directly replace the obsolete LM4041CIM7-1.2?

A: Yes. LM4041CIM7-1.2/NOPB is a direct parametric equivalent with identical voltage output (1.225V), current rating (12 mA), tolerance (±0.5%), and temperature coefficient (100ppm/°C). The primary differences are Active product status and ROHS3 compliance. The /NOPB suffix indicates lead-free construction.

Q: What is the difference between LM4041CIM7-1.2/NOPB and LM4041CIM7X-1.2/NOPB?

A: Both parts are electrically identical. The difference is packaging format: LM4041CIM7-1.2/NOPB is supplied in Tape & Reel (TR), while LM4041CIM7X-1.2/NOPB is supplied in Cut Tape (CT) & Digi-Reel format. Selection depends on assembly process requirements.

Q: Are STMicroelectronics parts compatible with the original Texas Instruments design?

A: STMicroelectronics LM4041 series parts maintain the same 1.225V output voltage and 12 mA current rating. However, they use SOT-323-5 packaging instead of SC-70-5. While both are 5-pin surface mount packages with compatible pinouts, PCB footprint verification is required. STMicroelectronics variants also exhibit different noise characteristics (60µVrms vs. 20µVrms) and lower cathode current (50 µA vs. 65 µA).

Q: Which substitute part offers the best performance improvement?

A: LM4041AECT-1.2 provides the tightest tolerance specification (±0.1% vs. ±0.5%) and extended operating temperature range (-40 to 125°C). This part is suitable for precision applications requiring superior voltage stability across temperature extremes.

Q: Is the LM4041C12IDCKR suitable as a replacement?

A: LM4041C12IDCKR is a parametric equivalent with identical electrical specifications and Active status. The cathode current specification differs slightly (80 µA vs. 65 µA), which may affect circuit biasing in applications with tight current budgets. Verify cathode current requirements in your application before selection.

Q: What are the RoHS compliance implications?

A: The original LM4041CIM7-1.2 is RoHS non-compliant. All recommended substitutes (Texas Instruments and STMicroelectronics variants) are ROHS3 compliant, meeting current regulatory requirements for new designs and production.

Q: Can I use a part with ±1% tolerance (LM4041DECT-1.2) instead of ±0.5%?

A: LM4041DECT-1.2 has wider tolerance (±1%) than the original specification (±0.5%). This substitution is only acceptable if your circuit design tolerates the increased voltage variation. Verify tolerance requirements in your application schematic before selection.

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