LM4040C50ILPE3 Equivalent & Substitute Parts

Part Overview

The LM4040C50ILPE3 is a shunt voltage reference IC manufactured by Texas Instruments, designed for precision voltage reference applications requiring fixed 5V output. This TO-92-3 packaged component delivers 15 mA output current with ±0.5% tolerance and operates across the industrial temperature range of -40°C to 85°C. The part is currently active in production with 602 units in stock. Equivalent and substitute parts are identified to support design flexibility, inventory management, and supply chain continuity for applications where the primary part number may be unavailable or where alternative performance specifications are acceptable.

Key Parameters

Parameter	Value
Reference Type	Shunt
Output Type	Fixed
Voltage - Output (Min/Fixed)	5V
Current - Output	15 mA
Tolerance	±0.5%
Temperature Coefficient	100ppm/°C
Noise - 10Hz to 10kHz	80µVrms
Current - Cathode	95 µA
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Through Hole
Package / Case	TO-226-3, TO-92-3 (TO-226AA)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the LM4040C50ILPE3 is determined by the following critical parameters: reference type (shunt), output voltage (5V fixed), output current capability (15 mA minimum), tolerance specification (±0.5% or better), temperature coefficient performance, operating temperature range (-40°C to 85°C), and physical package compatibility (TO-92-3). Parts are grouped into three categories based on substitution relationship:

Direct Manufacturer Substitutes maintain identical electrical specifications and packaging, differing only in packaging format or minor cathode current variations within acceptable limits.

Manufacturer Recommended Substitutes offer improved performance specifications (tighter tolerance or lower temperature coefficient) while maintaining the same output voltage, current rating, and package type, making them suitable for applications requiring enhanced precision.

Parametric Equivalents provide identical electrical performance and package compatibility but may originate from alternative manufacturers or have different packaging designations.

Parameter Comparison

Part Number	Manufacturer	Voltage Output	Current Output	Tolerance	Temp Coefficient	Cathode Current	Operating Temp	Package	RoHS Status
LM4040C50ILPE3	Texas Instruments	5V	15 mA	±0.5%	100ppm/°C	95 µA	-40°C ~ 85°C	TO-92-3	ROHS3 Compliant
LM4040CIZ-5.0/NOPB	Texas Instruments	5V	15 mA	±0.5%	100ppm/°C	80 µA	-40°C ~ 85°C	TO-92-3	ROHS3 Compliant
LM4040AIZ-5.0/NOPB	Texas Instruments	5V	15 mA	±0.1%	100ppm/°C	80 µA	-40°C ~ 85°C	TO-92-3	ROHS3 Compliant
LM4040BIZ-5.0/NOPB	Texas Instruments	5V	15 mA	±0.2%	100ppm/°C	80 µA	-40°C ~ 85°C	TO-92-3	ROHS3 Compliant
LM4040DIZ-5.0/NOPB	National Semiconductor	5V	15 mA	±1%	150ppm/°C	85 µA	-40°C ~ 85°C	TO-92-3	Not Specified
LT1634CCZ-5#PBF	Analog Devices Inc.	5V	30 mA	±0.2%	25ppm/°C	15 µA	0°C ~ 70°C	TO-92-3	ROHS3 Compliant
LM4040C50ILP	Texas Instruments	5V	15 mA	±0.5%	100ppm/°C	95 µA	-40°C ~ 85°C	TO-92-3	ROHS3 Compliant
LM4040CIZ-5.0	National Semiconductor	5V	15 mA	±0.5%	100ppm/°C	80 µA	-40°C ~ 85°C	TO-92-3	RoHS non-compliant

Engineering Selection Recommendations

LM4040CIZ-5.0/NOPB and LM4040C50ILP are direct functional equivalents to the LM4040C50ILPE3, maintaining identical electrical specifications and ROHS3 compliance. These parts are suitable for one-to-one replacement in applications where the original part number is unavailable.

LM4040AIZ-5.0/NOPB and LM4040BIZ-5.0/NOPB offer improved tolerance specifications (±0.1% and ±0.2% respectively) while maintaining the same output voltage, current rating, and operating temperature range. These parts are recommended for applications requiring enhanced precision beyond the ±0.5% specification of the primary part.

LM4040DIZ-5.0/NOPB provides functional compatibility with relaxed tolerance (±1%) and higher temperature coefficient (150ppm/°C). This part is suitable only for applications where the original ±0.5% tolerance and 100ppm/°C temperature coefficient specifications are not critical requirements.

LT1634CCZ-5#PBF from Analog Devices offers superior performance with ±0.2% tolerance, 25ppm/°C temperature coefficient, and 30 mA output current capability. However, this part operates only to 70°C maximum, making it unsuitable for applications requiring the full -40°C to 85°C industrial temperature range. Use only when operating temperature requirements are limited to 0°C to 70°C.

LM4040CIZ-5.0 (without NOPB designation) is a parametric equivalent but carries RoHS non-compliant status. This part should be avoided in applications subject to RoHS regulations.

Frequently Asked Questions (FAQ)

Q: Can LM4040AIZ-5.0/NOPB replace LM4040C50ILPE3 directly?

A: Yes. LM4040AIZ-5.0/NOPB is a direct pin-compatible replacement with identical output voltage (5V), current rating (15 mA), operating temperature range (-40°C to 85°C), and TO-92-3 package. The tighter tolerance specification (±0.1% versus ±0.5%) represents improved performance and poses no compatibility issues.

Q: What is the difference between LM4040C50ILP and LM4040CIZ-5.0/NOPB?

A: Both parts are electrically identical to the LM4040C50ILPE3 with 5V output, 15 mA current, ±0.5% tolerance, and TO-92-3 packaging. The primary difference is cathode current (95 µA for LM4040C50ILP versus 80 µA for LM4040CIZ-5.0/NOPB), which is negligible for most applications. Both are ROHS3 compliant.

Q: Is LT1634CCZ-5#PBF suitable for all applications using LM4040C50ILPE3?

A: LT1634CCZ-5#PBF is suitable only for applications operating within 0°C to 70°C. The maximum operating temperature of 70°C makes it incompatible with applications requiring the full industrial temperature range (-40°C to 85°C) of the original part. Additionally, the higher output current (30 mA) and superior temperature coefficient (25ppm/°C) may introduce design changes in current-limiting circuits.

Q: Why is LM4040DIZ-5.0/NOPB listed as a substitute if it has ±1% tolerance?

A: LM4040DIZ-5.0/NOPB maintains the same 5V output voltage, 15 mA current rating, TO-92-3 package, and -40°C to 85°C operating temperature range. It is listed as a substitute for applications where ±1% tolerance is acceptable. The higher temperature coefficient (150ppm/°C versus 100ppm/°C) must be evaluated against specific circuit requirements.

Q: Should I use LM4040CIZ-5.0 (non-NOPB) in new designs?

A: No. LM4040CIZ-5.0 is RoHS non-compliant and should not be used in new designs subject to RoHS regulations. Use LM4040CIZ-5.0/NOPB instead, which is ROHS3 compliant and electrically identical.

Q: Are all substitute parts available in the same packaging format?

A: Yes. All listed substitute parts use TO-92-3 (TO-226-3) through-hole packaging, ensuring mechanical compatibility with the original LM4040C50ILPE3 design. No PCB layout modifications are required for substitution.

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