LPV531MK Equivalent & Substitute Parts

Part Overview

The LPV531MK is a general purpose operational amplifier manufactured by Texas Instruments, designed for rail-to-rail applications in a compact SOT-23-THIN surface mount package. This device is classified as obsolete, which necessitates identification of equivalent substitute components for ongoing design support and procurement continuity. The LPV531MK delivers 1 circuit configuration with specified electrical performance suitable for low-power analog signal processing applications.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	1	—
Output Type	Rail-to-Rail	—
Slew Rate	2.5	V/µs
Gain Bandwidth Product	4.6	MHz
Current - Input Bias	0.05	pA
Voltage - Input Offset	1	mV
Current - Supply	425	µA
Current - Output / Channel	24	mA
Voltage - Supply Span (Min)	2.7	V
Voltage - Supply Span (Max)	5.5	V
Operating Temperature Range	-40 to 85	°C
Package / Case	SOT-23-6 Thin, TSOT-23-6	—
Mounting Type	Surface Mount	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the LPV531MK is determined by strict equivalence across the following critical parameters:

Electrical Performance Criteria:

Amplifier type classification (General Purpose)
Number of circuits (1)
Output configuration (Rail-to-Rail)
Slew rate (2.5 V/µs)
Gain bandwidth product (4.6 MHz)
Input bias current (0.05 pA)
Input offset voltage (1 mV)
Supply current (425 µA)
Output current per channel (24 mA)
Supply voltage range (2.7 V to 5.5 V)
Operating temperature range (-40°C to 85°C)

Mechanical & Packaging Criteria:

Package type (SOT-23-6 Thin / TSOT-23-6)
Mounting technology (Surface Mount)
Moisture sensitivity level (1 - Unlimited)

The LPV531MK/NOPB is identified as a direct substitute based on identical electrical specifications and package configuration. The primary distinction is product status and packaging format.

Parameter Comparison

Parameter	LPV531MK	LPV531MK/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 (V/µs)	2.5	2.5	✓
Gain Bandwidth Product (MHz)	4.6	4.6	✓
Current - Input Bias (pA)	0.05	0.05	✓
Voltage - Input Offset (mV)	1	1	✓
Current - Supply (µA)	425	425	✓
Current - Output / Channel (mA)	24	24	✓
Voltage - Supply Span Min (V)	2.7	2.7	✓
Voltage - Supply Span Max (V)	5.5	5.5	✓
Operating Temperature (°C)	-40 to 85	-40 to 85	✓
Package / Case	SOT-23-6 Thin, TSOT-23-6	SOT-23-6 Thin, TSOT-23-6	✓
Mounting Type	Surface Mount	Surface Mount	✓
Product Status	Obsolete	Active	—
Packaging Format	Tube or Bulk	Tape & Reel (TR)	—
RoHS Status	RoHS non-compliant	ROHS3 Compliant	—

Engineering Selection Recommendations

Primary Substitute: LPV531MK/NOPB

The LPV531MK/NOPB is the direct functional equivalent of the LPV531MK. All electrical parameters, circuit configuration, and mechanical specifications are identical. Selection of LPV531MK/NOPB is appropriate for new designs and replacement procurement due to the following factors:

Product Status: LPV531MK/NOPB maintains active product status with Texas Instruments, ensuring continued availability and manufacturing support. The original LPV531MK is classified as obsolete.
Compliance Certification: LPV531MK/NOPB is ROHS3 compliant, meeting current environmental and regulatory requirements. The original LPV531MK is RoHS non-compliant.
Packaging Format: LPV531MK/NOPB is supplied in Tape & Reel (TR) format, standard for automated assembly operations. This format supports high-volume production workflows.
Electrical Equivalence: All specified electrical parameters remain unchanged, confirming direct pin-to-pin and functional compatibility.
Inventory Availability: LPV531MK/NOPB demonstrates higher inventory levels (2805 Pcs) compared to the original part (1140 Pcs), supporting supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can LPV531MK/NOPB be used as a direct replacement for LPV531MK in existing designs?

A: Yes. LPV531MK/NOPB is electrically and mechanically identical to LPV531MK. Pin configuration, electrical performance, and package dimensions are equivalent. Direct substitution is supported without circuit modification.

Q: What is the difference between LPV531MK and LPV531MK/NOPB?

A: The primary differences are product status, compliance certification, and packaging format. LPV531MK/NOPB is an active product with ROHS3 compliance and Tape & Reel packaging. LPV531MK is obsolete, RoHS non-compliant, and supplied in alternative packaging. Electrical specifications are identical.

Q: Is the SOT-23-THIN package compatible with standard SOT-23 footprints?

A: The SOT-23-THIN (TSOT-23-6) package is a thin variant of the standard SOT-23-6 package. Pin pitch and footprint dimensions are equivalent. Verification of PCB assembly equipment compatibility with thin package specifications is required for specific manufacturing environments.

Q: What is the significance of the /NOPB suffix in LPV531MK/NOPB?

A: The /NOPB suffix indicates "No Plumbum" (lead-free) packaging, confirming RoHS compliance and the absence of lead in solder and component materials.

Q: Are there any thermal or performance differences between LPV531MK and LPV531MK/NOPB?

A: No. Thermal characteristics, operating temperature range, and all electrical performance parameters are identical between the two parts.

Q: What is the Moisture Sensitivity Level (MSL) rating for these components?

A: Both LPV531MK and LPV531MK/NOPB carry an MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

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