LM723CN/NOPB Equivalent & Substitute Parts

Part Overview

The LM723CN/NOPB is a linear voltage regulator IC from Texas Instruments designed for positive adjustable output applications. This 14-PDIP packaged component delivers 150mA output current with input voltage capability up to 40V and adjustable output voltage ranging from 2V to 37V. The device is classified as Obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Output Configuration	Positive
Output Type	Adjustable
Number of Regulators	1
Voltage - Input (Max)	40V
Voltage - Output (Min/Fixed)	2V
Voltage - Output (Max)	37V
Current - Output	150mA
PSRR	86dB ~ 74dB (50Hz ~ 10kHz)
Control Features	Current Limit, Frequency Control
Protection Features	Short Circuit
Operating Temperature	0°C ~ 70°C
Mounting Type	Through Hole
Package / Case	14-DIP (0.300", 7.62mm)
RoHS Status	ROHS3 Compliant
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution eligibility for the LM723CN/NOPB is determined by strict alignment across the following critical parameters:

Output Configuration: Positive
Output Type: Adjustable
Number of Regulators: 1
Voltage - Input (Max): 40V
Voltage - Output (Min/Fixed): 2V
Voltage - Output (Max): 37V
Current - Output: 150mA
Operating Temperature: 0°C ~ 70°C
Mounting Type: Through Hole
RoHS Status: ROHS3 Compliant
REACH Status: REACH Unaffected

Two substitute parts meet these criteria: UA723CN and LM723CH/NOPB. Both maintain identical electrical specifications and regulatory compliance. Differences exist only in packaging format, product status, and specific control/protection feature configurations.

Parameter Comparison

Parameter	LM723CN/NOPB	UA723CN	LM723CH/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments
Output Configuration	Positive	Positive	Positive
Output Type	Adjustable	Adjustable	Adjustable
Number of Regulators	1	1	1
Voltage - Input (Max)	40V	40V	40V
Voltage - Output (Min/Fixed)	2V	2V	2V
Voltage - Output (Max)	37V	37V	37V
Current - Output	150mA	150mA	150mA
PSRR	86dB ~ 74dB (50Hz ~ 10kHz)	74dB ~ 86dB (50Hz ~ 10kHz)	86dB ~ 74dB (50Hz ~ 10kHz)
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)	TO-100-10 Metal Can
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Obsolete	Last Time Buy	Active

Engineering Selection Recommendations

UA723CN serves as a direct electrical equivalent with identical 14-DIP packaging. This part carries Last Time Buy status, indicating limited future availability. Selection of UA723CN is appropriate for applications requiring pin-for-pin compatibility with the original LM723CN/NOPB footprint, provided that procurement timelines accommodate the Last Time Buy constraint.

LM723CH/NOPB is the manufacturer-recommended substitute with Active product status, ensuring long-term availability and supply chain stability. This part maintains all electrical specifications but uses TO-100-10 Metal Can packaging instead of 14-DIP. Selection of LM723CH/NOPB requires PCB redesign to accommodate the different package footprint. This option is preferred for new designs and applications where extended component lifecycle is required.

Both substitutes maintain ROHS3 compliance and REACH Unaffected status, meeting regulatory requirements equivalent to the original part.

Frequently Asked Questions (FAQ)

Q: Can UA723CN be used as a direct replacement for LM723CN/NOPB?

A: Yes. UA723CN provides electrical equivalence with identical 14-DIP packaging, enabling direct PCB substitution. However, UA723CN carries Last Time Buy status, limiting future procurement availability.

Q: What is the primary difference between LM723CH/NOPB and LM723CN/NOPB?

A: The primary difference is packaging format. LM723CH/NOPB uses TO-100-10 Metal Can packaging, while LM723CN/NOPB uses 14-DIP packaging. All electrical specifications remain identical. PCB redesign is required to accommodate the different package footprint.

Q: Why is LM723CH/NOPB recommended over UA723CN?

A: LM723CH/NOPB carries Active product status, ensuring long-term availability and supply chain continuity. UA723CN is Last Time Buy, indicating limited future stock. For applications requiring extended component lifecycle, LM723CH/NOPB is the preferred selection.

Q: Are there differences in control or protection features between these parts?

A: LM723CN/NOPB and LM723CH/NOPB both include Current Limit and Frequency Control features with Short Circuit protection. UA723CN includes Current Limit but does not specify Frequency Control or Short Circuit protection in the provided data. Verify feature requirements for your specific application.

Q: Do all three parts meet the same regulatory compliance standards?

A: Yes. All three parts are ROHS3 Compliant and REACH Unaffected, meeting equivalent regulatory requirements.

Q: What is the moisture sensitivity level for these parts?

A: LM723CN/NOPB and LM723CH/NOPB both have MSL 1 (Unlimited). UA723CN has MSL Not Applicable. All parts are suitable for standard handling and storage conditions.

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