LPV321M5X Equivalent & Substitute Parts

Part Overview

The LPV321M5X is a general-purpose operational amplifier manufactured by Texas Instruments, featuring a single circuit configuration with rail-to-rail output capability in a compact SOT-23-5 surface mount package. This device is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and production continuity. The LPV321M5X operates across a 2.7V to 5V supply range with low input bias current and is suitable for low-power analog signal processing applications.

Substiute Parts

LPV321M5X

Texas InstrumentsIn Stock: 17351LPV321M5X Datasheet

Current PartRFQ

LPV321M5X/NOPB

National SemiconductorIn Stock: 10163LPV321M5X/NOPB Datasheet

DirectRFQ

MCP606T-I/OT

Microchip TechnologyIn Stock: 55486MCP606T-I/OT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LPV321M5X is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Amplifier Type: General Purpose
• Number of Circuits: 1
• Output Type: Rail-to-Rail
• Package / Case: SC-74A, SOT-753
• Supplier Device Package: SOT-23-5
• Operating Temperature Range: -40°C to 85°C (minimum requirement)
• Voltage Supply Span: Minimum 2.7V, Maximum 5V (or compatible range)

Secondary Compatibility Parameters:

• Slew Rate: 0.1 V/µs or greater
• Gain Bandwidth Product: 152 kHz or greater
• Current - Input Bias: 2 nA or lower
• Voltage - Input Offset: 1.5 mV or lower
• Current - Supply: 9 µA or lower
• Current - Output / Channel: 60 mA or greater

Identified substitute parts meet the primary criteria and maintain compatibility within the secondary parameter ranges, ensuring functional equivalence in existing circuit designs.

Parameter Comparison

Engineering Selection Recommendations

LPV321M5X/NOPB (Direct Equivalent)

The LPV321M5X/NOPB is a direct functional equivalent manufactured by National Semiconductor. This part maintains identical electrical specifications across all critical parameters: slew rate, gain bandwidth product, input bias current, input offset voltage, supply current, and supply voltage range. The part carries active product status, ensuring continued availability and manufacturing support. This substitute is the primary choice for direct replacement in existing designs without circuit modification.

MCP606T-I/OT (Alternative Substitute)

The MCP606T-I/OT manufactured by Microchip Technology is an active alternative substitute that meets all primary substitution criteria. This device demonstrates superior performance characteristics in several parameters: lower input bias current (1 pA versus 2 nA), reduced input offset voltage (250 µV versus 1.5 mV), and extended maximum supply voltage (6V versus 5V). The MCP606T-I/OT is RoHS3 compliant, addressing environmental and regulatory requirements not met by the obsolete LPV321M5X. The slew rate specification (0.08 V/µs) is marginally lower but remains within acceptable tolerance for general-purpose amplifier applications. Output current capability (17 mA) is reduced compared to the main part (60 mA), requiring circuit-level evaluation for applications demanding higher output drive capability.

Product Status Consideration

Both substitute parts carry active product status, ensuring long-term supply chain viability. The LPV321M5X/NOPB provides direct compatibility with minimal design risk. The MCP606T-I/OT offers enhanced performance and regulatory compliance at the cost of reduced output current capacity.

Frequently Asked Questions (FAQ)

Q: Can LPV321M5X/NOPB be used as a direct drop-in replacement for LPV321M5X?

A: Yes. The LPV321M5X/NOPB maintains identical electrical specifications and package configuration (SOT-23-5). No circuit modifications are required for direct substitution.

Q: What are the key differences between MCP606T-I/OT and the original LPV321M5X?

A: The MCP606T-I/OT offers improved input offset voltage (250 µV versus 1.5 mV) and lower input bias current (1 pA versus 2 nA). However, output current per channel is reduced (17 mA versus 60 mA), and slew rate is marginally lower (0.08 V/µs versus 0.1 V/µs). Supply voltage range is extended to 6V maximum. These differences require evaluation based on specific circuit requirements.

Q: Are all substitute parts available in the same package?

A: Yes. All identified substitutes use the SOT-23-5 package (SC-74A, SOT-753), ensuring mechanical and electrical compatibility with existing PCB layouts and socket configurations.

Q: Which substitute is recommended for new designs?

A: Selection depends on application requirements. For direct compatibility with legacy designs, use LPV321M5X/NOPB. For new designs requiring improved performance and RoHS3 compliance, evaluate MCP606T-I/OT with consideration for reduced output current capacity.

Q: What is the impact of the MCP606T-I/OT's lower output current specification?

A: The MCP606T-I/OT provides 17 mA output current versus 60 mA for the LPV321M5X. Applications requiring output currents exceeding 17 mA require external buffering or alternative component selection. General-purpose signal conditioning and low-power applications typically operate within this reduced specification.

Q: Is RoHS compliance a factor in substitute selection?

A: The LPV321M5X is RoHS non-compliant. The MCP606T-I/OT is RoHS3 compliant. For applications subject to environmental regulations or customer requirements mandating RoHS compliance, the MCP606T-I/OT is the appropriate selection.

Q: Can these substitutes be used interchangeably in all applications?

A: No. While all parts meet primary substitution criteria, application-specific requirements must be evaluated. The MCP606T-I/OT's reduced output current capacity and marginally lower slew rate may impact performance in high-speed or high-current-drive applications. Circuit-level analysis is required for applications operating at parameter limits.