LM4041CILP Equivalent & Substitute Parts

Part Overview

The LM4041CILP is a shunt voltage reference IC manufactured by Texas Instruments, designed for precision micropower applications requiring adjustable output voltage. This component operates as an adjustable shunt regulator with a fixed output voltage of 1.233V and maximum output of 10V, delivering up to 12mA output current with ±0.5% tolerance. The part is packaged in TO-92-3 (through-hole) configuration and is currently classified as obsolete. Due to its obsolete status, identifying functionally equivalent and manufacturer-recommended substitute parts is essential for design continuity and procurement planning.

Key Parameters

Parameter	Value
Reference Type	Shunt
Output Type	Adjustable
Voltage - Output (Min/Fixed)	1.233V
Voltage - Output (Max)	10V
Current - Output	12mA
Tolerance	±0.5%
Temperature Coefficient	100ppm/°C
Noise (10Hz to 10kHz)	20µVrms
Current - Cathode	80µA
Operating Temperature	-40°C to 85°C
Mounting Type	Through Hole
Package / Case	TO-92-3 (TO-226-3)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the LM4041CILP is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Reference Type: Shunt
Output Type: Adjustable
Voltage - Output (Min/Fixed): 1.233V
Voltage - Output (Max): 10V
Current - Output: 12mA
Operating Temperature Range: -40°C to 85°C
Mounting Type: Through Hole
Package / Case: TO-92-3

Secondary Substitution Criteria:

Tolerance: ±0.5% (exact match required for precision applications)
Temperature Coefficient: 100ppm/°C
Noise - 10Hz to 10kHz: 20µVrms
Current - Cathode: 80µA (nominal specification)

Substitute parts are categorized into two groups:

Group 1: Manufacturer-Recommended Substitutes - Parts recommended by Texas Instruments as direct replacements with identical or superior electrical performance and active product status.

Group 2: Parametric Equivalents - Parts meeting all critical electrical specifications but with different product status or minor parameter variations that do not affect functional compatibility in standard applications.

Parameter Comparison

Parameter	LM4041CILP (Main)	LM4041CIDBZR	LM4041DIZ-ADJ/NOPB	LM4041CIZ-ADJ/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	National Semiconductor
Reference Type	Shunt	Shunt	Shunt	Shunt
Output Type	Adjustable	Adjustable	Adjustable	Adjustable
Voltage - Output (Min/Fixed)	1.233V	1.233V	1.233V	1.233V
Voltage - Output (Max)	10V	10V	10V	10V
Current - Output	12mA	12mA	12mA	12mA
Tolerance	±0.5%	±0.5%	±1%	±0.5%
Temperature Coefficient	100ppm/°C	100ppm/°C	150ppm/°C	100ppm/°C
Noise (10Hz to 10kHz)	20µVrms	20µVrms	20µVrms	20µVrms
Current - Cathode	80µA	80µA	70µA	65µA
Operating Temperature	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C
Mounting Type	Through Hole	Surface Mount	Through Hole	Through Hole
Package / Case	TO-92-3	SOT-23-3	TO-92-3	TO-92-3
Product Status	Obsolete	Active	Last Time Buy	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not Specified

Engineering Selection Recommendations

For Direct Through-Hole Replacement (Same Package):

Select LM4041CIZ-ADJ/NOPB as the primary equivalent for through-hole applications. This part maintains identical electrical specifications (±0.5% tolerance, 100ppm/°C temperature coefficient) and operates within the same temperature range. The part is manufactured by National Semiconductor and carries active product status with full RoHS compliance. Cathode current is 65µA compared to the original 80µA, representing improved efficiency without affecting functional performance.

Alternative Through-Hole Option:

LM4041DIZ-ADJ/NOPB is available as a secondary through-hole substitute. This part carries Last Time Buy status and features ±1% tolerance with 150ppm/°C temperature coefficient. Selection of this part is appropriate only when tolerance relaxation to ±1% is acceptable for the application. Cathode current is 70µA.

For Surface-Mount Conversion:

LM4041CIDBZR is the manufacturer-recommended substitute for applications permitting conversion to surface-mount technology. This part is packaged in SOT-23-3 and maintains identical electrical specifications (±0.5% tolerance, 100ppm/°C temperature coefficient, 12mA output current). The part carries active product status with highest inventory availability (48,092 units). Selection of this part requires PCB redesign to accommodate SOT-23-3 footprint.

Compliance Considerations:

All recommended substitutes maintain ROHS3 compliance and EAR99 export classification. The LM4041CILP original part is classified as REACH Unaffected, as are all substitute options.

Frequently Asked Questions (FAQ)

Q: Can LM4041CIDBZR replace LM4041CILP in existing through-hole designs?

A: No. LM4041CIDBZR uses SOT-23-3 surface-mount packaging, while LM4041CILP uses TO-92-3 through-hole packaging. Direct board-level substitution is not possible without PCB redesign. For through-hole applications, use LM4041CIZ-ADJ/NOPB or LM4041DIZ-ADJ/NOPB.

Q: What is the difference between ±0.5% and ±1% tolerance options?

A: Tolerance specifies the maximum deviation of output voltage from the nominal 1.233V specification. ±0.5% tolerance (LM4041CILP, LM4041CIDBZR, LM4041CIZ-ADJ/NOPB) permits ±6.165mV deviation. ±1% tolerance (LM4041DIZ-ADJ/NOPB) permits ±12.33mV deviation. Selection depends on circuit requirements for output voltage accuracy.

Q: Why does LM4041DIZ-ADJ/NOPB have 150ppm/°C temperature coefficient instead of 100ppm/°C?

A: Temperature coefficient indicates output voltage drift per degree Celsius change. The 150ppm/°C specification for LM4041DIZ-ADJ/NOPB represents greater temperature sensitivity compared to the original 100ppm/°C. This part is suitable only when temperature stability requirements are less stringent.

Q: Is LM4041CIZ-ADJ/NOPB a direct functional equivalent?

A: Yes. LM4041CIZ-ADJ/NOPB meets all critical electrical specifications: 1.233V minimum output, 10V maximum output, 12mA output current, ±0.5% tolerance, 100ppm/°C temperature coefficient, and -40°C to 85°C operating range. The part is packaged in TO-92-3 and carries active product status.

Q: What is the inventory status for each substitute?

A: LM4041CIDBZR: 48,092 units (highest availability). LM4041DIZ-ADJ/NOPB: 1,740 units. LM4041CIZ-ADJ/NOPB: 2,079 units. LM4041CILP (original): 677 units (obsolete).

Q: Are all substitutes RoHS compliant?

A: LM4041CIDBZR, LM4041DIZ-ADJ/NOPB, and LM4041CILP are ROHS3 compliant. LM4041CIZ-ADJ/NOPB RoHS status is not specified in available documentation.

Q: Can cathode current differences affect circuit operation?

A: Cathode current specifications (80µA for LM4041CILP, 65µA for LM4041CIZ-ADJ/NOPB, 70µA for LM4041DIZ-ADJ/NOPB) represent typical operating current. Variations within this range do not affect functional performance in standard shunt regulator applications.

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