LM4041CQFTA Equivalent & Substitute Parts

Part Overview

The LM4041CQFTA is a shunt voltage reference integrated circuit manufactured by Diodes Incorporated, classified as a Power Management (PMIC) component. This device provides a fixed 1.225V output with ±0.5% tolerance and is packaged in SOT-23-3 surface mount configuration. The part is currently in active product status with 1102 units in stock.

Shunt voltage reference ICs serve as precision voltage standards in analog circuits, power supply designs, and measurement applications. Identifying equivalent and substitute parts is necessary when the primary part number becomes unavailable, when alternative sourcing is required, or when design flexibility across manufacturing partners is needed while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Reference Type	Shunt	—
Output Type	Fixed	—
Voltage - Output (Min/Fixed)	1.225	V
Current - Output	12	mA
Tolerance	±0.5	%
Temperature Coefficient	100	ppm/°C
Noise - 10Hz to 10kHz	20	µVrms
Current - Cathode	68	µA
Operating Temperature	-40 to 125	°C
Package / Case	TO-236-3, SC-59, SOT-23-3	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Grade	Automotive	—
Qualification	AEC-Q100	—

Substitute Part Grouping Explanation

Substitute parts for the LM4041CQFTA are determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

Reference Type: Shunt
Output Type: Fixed
Voltage - Output: 1.225V
Current - Output: 12 mA
Tolerance: ±0.5%
Temperature Coefficient: 100 ppm/°C
Noise - 10Hz to 10kHz: 20 µVrms
Operating Temperature Range: -40°C to 125°C

Mechanical Equivalence Criteria:

Package / Case: TO-236-3, SC-59, SOT-23-3
Mounting Type: Surface Mount
Supplier Device Package: SOT-23-3

Compliance Criteria:

RoHS Status: ROHS3 Compliant
REACH Status: REACH Unaffected

All substitute parts listed maintain identical electrical performance specifications and physical packaging, ensuring direct functional replacement in circuit designs. Variations in cathode current (ranging from 65 µA to 80 µA) and product status do not affect substitutability for standard applications within the specified operating parameters.

Parameter Comparison

Part Number	Manufacturer	Voltage Output (V)	Current Output (mA)	Tolerance (%)	Temp Coeff (ppm/°C)	Cathode Current (µA)	Operating Temp (°C)	Package	Product Status	Inventory (Pcs)
LM4041CQFTA	Diodes Incorporated	1.225	12	±0.5	100	68	-40 to 125	SOT-23-3	Active	1102
LM4041CFTA	Diodes Incorporated	1.225	12	±0.5	100	68	-40 to 125	SOT-23-3	Active	10729
LM4041C12QDBZR	Texas Instruments	1.225	12	±0.5	100	80	-40 to 125	SOT-23-3	Active	17600
LM4041C12QDBZT	Texas Instruments	1.225	12	±0.5	100	80	-40 to 125	SOT-23-3	Active	1294
LM4041CEM3-1.2	Texas Instruments	1.225	12	±0.5	100	68	-40 to 125	SOT-23-3	Last Time Buy	2000
LM4041CEM3-1.2/NOPB	Texas Instruments	1.225	12	±0.5	100	68	-40 to 125	SOT-23-3	Active	1309
LM4041CEM3X-1.2/NOPB	Texas Instruments	1.225	12	±0.5	100	68	-40 to 125	SOT-23-3	Active	1213
LM4041QCEM3-1.2NO	Texas Instruments	1.225	12	±0.5	100	68	-40 to 125	SOT-23-3	Active	2360
LM4041QCEM3X-1.2NO	Texas Instruments	1.225	12	±0.5	100	68	-40 to 125	SOT-23-3	Active	9100
LM4041QCIM3-1.2/NO	Texas Instruments	1.225	12	±0.5	100	65	-40 to 125	SOT-23-3	Active	1772

Engineering Selection Recommendations

Primary Substitutes (Diodes Incorporated):

LM4041CFTA is the direct equivalent from Diodes Incorporated with identical electrical specifications and cathode current (68 µA). This part maintains the same product status (Active) and offers the highest inventory availability (10729 units), making it the preferred substitute when sourcing from the original manufacturer is required.

Secondary Substitutes (Texas Instruments - Standard Grade):

LM4041C12QDBZR and LM4041C12QDBZT are Texas Instruments equivalents with identical electrical performance. Both parts feature slightly elevated cathode current (80 µA) compared to the primary part, which remains within acceptable operating margins for standard applications. LM4041C12QDBZR offers superior inventory availability (17600 units) and is recommended for high-volume requirements.

LM4041CEM3-1.2/NOPB and LM4041CEM3X-1.2/NOPB are Texas Instruments variants with matching cathode current (68 µA) and active product status. These parts are suitable for applications requiring specific packaging designations or supply chain diversity.

Tertiary Substitutes (Texas Instruments - Automotive Grade):

LM4041QCEM3-1.2NO, LM4041QCEM3X-1.2NO, and LM4041QCIM3-1.2/NO are automotive-qualified variants carrying AEC-Q100 certification, matching the automotive grade of the primary part. These parts are appropriate for automotive and mission-critical applications requiring automotive-grade components. LM4041QCEM3X-1.2NO provides the highest inventory level (9100 units) among automotive variants.

Obsolescence Consideration:

LM4041CEM3-1.2 carries Last Time Buy status and should be avoided for new designs or long-term production requirements.

Frequently Asked Questions (FAQ)

Q: Can LM4041C12QDBZR be used as a direct replacement for LM4041CQFTA?

A: Yes. Both parts share identical electrical specifications (1.225V output, ±0.5% tolerance, 12 mA output current, 100 ppm/°C temperature coefficient) and SOT-23-3 packaging. The cathode current difference (80 µA versus 68 µA) does not affect circuit functionality within standard operating parameters.

Q: What is the difference between LM4041CEM3-1.2 and LM4041CEM3-1.2/NOPB?

A: Both parts are electrically identical. The "/NOPB" designation indicates lead-free plating compliance. LM4041CEM3-1.2/NOPB is in Active status with 1309 units available, while LM4041CEM3-1.2 is Last Time Buy status. For new designs, LM4041CEM3-1.2/NOPB is the recommended choice.

Q: Are automotive-grade variants (LM4041QCEM3X-1.2NO) suitable for non-automotive applications?

A: Yes. Automotive-grade parts meet or exceed standard industrial specifications and are fully compatible with non-automotive applications. The AEC-Q100 qualification provides additional reliability assurance.

Q: What is the significance of the cathode current variation (65 µA to 80 µA) across substitute parts?

A: Cathode current represents the minimum operating current required to maintain regulation. All listed variants operate within the 12 mA output specification and maintain the same 1.225V reference voltage. The variation does not affect substitutability for applications within the specified operating range.

Q: Can I use LM4041CFTA if LM4041CQFTA is unavailable?

A: Yes. LM4041CFTA is a parametric equivalent from Diodes Incorporated with identical electrical and mechanical specifications. It is available in higher quantity (10729 units) and maintains Active product status.

Q: What packaging options are available for these substitute parts?

A: All listed substitute parts use SOT-23-3 surface mount packaging (also designated TO-236-3 or SC-59). This ensures mechanical compatibility with PCB layouts designed for the LM4041CQFTA.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH Unaffected status, meeting environmental and regulatory requirements equivalent to the primary part.

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