LM7321MF/NOPB Equivalent & Substitute Parts

Part Overview

The LM7321MF/NOPB is a general-purpose operational amplifier manufactured by Texas Instruments, designed for rail-to-rail signal processing applications. This device integrates a single amplifier circuit in a compact SOT-23-5 surface mount package, suitable for low-voltage and battery-powered systems requiring precision signal conditioning.

The LM7321MF/NOPB carries a Last Time Buy product status, indicating that Texas Instruments has discontinued active production. This status necessitates identification of equivalent substitute components to ensure design continuity and supply chain reliability for ongoing production and maintenance applications.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	1	—
Output Type	Rail-to-Rail	—
Slew Rate	18	V/µs
Gain Bandwidth Product	20	MHz
Current - Input Bias	1.1	µA
Voltage - Input Offset	700	mV
Current - Supply	1.1	mA
Current - Output / Channel	100	mA
Voltage - Supply Span (Min)	2.5	V
Voltage - Supply Span (Max)	32	V
Operating Temperature Range	-40 to 125	°C
Package / Case	SC-74A, SOT-753	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility for the LM7321MF/NOPB is determined by strict equivalence across all electrical and mechanical parameters. The substitute part must satisfy the following criteria:

Electrical Parameter Equivalence:

Amplifier type classification (General Purpose)
Single circuit configuration
Rail-to-rail output capability
Identical slew rate (18 V/µs)
Identical gain bandwidth product (20 MHz)
Matching input bias current (1.1 µA)
Matching input offset voltage (700 mV)
Matching supply current (1.1 mA)
Matching output current per channel (100 mA)
Identical supply voltage range (2.5 V to 32 V)
Identical operating temperature range (-40°C to 125°C)

Mechanical and Compliance Equivalence:

Surface mount technology
SC-74A / SOT-753 package footprint
SOT-23-5 supplier device package
ROHS3 compliance
Moisture sensitivity level 1 (Unlimited)
REACH unaffected status

The LM7321MFX/NOPB meets all substitution criteria and is classified as the manufacturer-recommended equivalent.

Parameter Comparison

Parameter	LM7321MF/NOPB	LM7321MFX/NOPB	Match
Manufacturer	Texas Instruments	Texas Instruments	✓
Amplifier Type	General Purpose	General Purpose	✓
Number of Circuits	1	1	✓
Output Type	Rail-to-Rail	Rail-to-Rail	✓
Slew Rate	18 V/µs	18 V/µs	✓
Gain Bandwidth Product	20 MHz	20 MHz	✓
Current - Input Bias	1.1 µA	1.1 µA	✓
Voltage - Input Offset	700 mV	700 mV	✓
Current - Supply	1.1 mA	1.1 mA	✓
Current - Output / Channel	100 mA	100 mA	✓
Voltage - Supply Span (Min)	2.5 V	2.5 V	✓
Voltage - Supply Span (Max)	32 V	32 V	✓
Operating Temperature	-40°C to 125°C	-40°C to 125°C	✓
Package / Case	SC-74A, SOT-753	SC-74A, SOT-753	✓
Mounting Type	Surface Mount	Surface Mount	✓
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	✓
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	✓
Product Status	Last Time Buy	Active	—

Engineering Selection Recommendations

The LM7321MFX/NOPB is the direct substitute for the LM7321MF/NOPB. Both components are manufactured by Texas Instruments and share identical electrical specifications and mechanical packaging.

Supply Availability Consideration: The LM7321MF/NOPB is designated Last Time Buy, indicating production discontinuation. The LM7321MFX/NOPB maintains Active product status with current inventory availability (19,804 units in stock versus 23,400 units for the original part). For new designs and ongoing production requirements, the LM7321MFX/NOPB is the appropriate selection.

Compliance and Certification: Both parts maintain ROHS3 compliance, REACH unaffected status, and identical moisture sensitivity classification. No additional qualification or testing is required for substitution based on regulatory or environmental compliance criteria.

Packaging and Assembly: Both components utilize identical surface mount packaging (SC-74A, SOT-753, SOT-23-5 supplier package), ensuring direct compatibility with existing PCB layouts and assembly processes without design modification.

Frequently Asked Questions (FAQ)

Q: Can the LM7321MFX/NOPB be used as a direct replacement for the LM7321MF/NOPB without PCB redesign?

A: Yes. The LM7321MFX/NOPB is electrically and mechanically identical to the LM7321MF/NOPB. Both components use the same SC-74A / SOT-753 package footprint and pin configuration. No PCB layout changes are required.

Q: What is the difference between LM7321MF/NOPB and LM7321MFX/NOPB?

A: The primary difference is product status. The LM7321MF/NOPB is Last Time Buy (discontinued), while the LM7321MFX/NOPB is Active (current production). All electrical parameters, mechanical specifications, and compliance certifications are identical.

Q: Are there any performance differences between these two parts?

A: No. Both parts share identical specifications for slew rate (18 V/µs), gain bandwidth product (20 MHz), input bias current (1.1 µA), input offset voltage (700 mV), supply current (1.1 mA), output current (100 mA), and operating temperature range (-40°C to 125°C).

Q: Is the LM7321MFX/NOPB RoHS compliant?

A: Yes. The LM7321MFX/NOPB is ROHS3 compliant and maintains the same compliance status as the LM7321MF/NOPB.

Q: What is the moisture sensitivity level for the LM7321MFX/NOPB?

A: The moisture sensitivity level is 1 (Unlimited), indicating no moisture sensitivity restrictions for storage, handling, or assembly.

Q: Can I use the LM7321MFX/NOPB in applications requiring the -40°C to 125°C operating temperature range?

A: Yes. The LM7321MFX/NOPB is rated for the full -40°C to 125°C operating temperature range, identical to the LM7321MF/NOPB.

Q: What supply voltage range does the LM7321MFX/NOPB support?

A: The LM7321MFX/NOPB supports a supply voltage range of 2.5 V to 32 V, enabling operation in both low-voltage and higher-voltage applications.

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