OPA2344PA Equivalent & Substitute Parts

Part Overview

The OPA2344PA is a CMOS dual-channel operational amplifier manufactured by Texas Instruments, housed in an 8-pin DIP package. This device features rail-to-rail output capability and operates across a 2.5V to 5.5V supply range, making it suitable for low-voltage analog signal processing applications. The OPA2344PA is classified as obsolete; therefore, identifying functionally compatible substitute components is necessary for ongoing design support, production continuity, and system maintenance.

Substiute Parts

OPA2344PA

Texas InstrumentsIn Stock: 4384OPA2344PA Datasheet

Current PartRFQ

LM6142BIN/NOPB

Texas InstrumentsIn Stock: 837LM6142BIN/NOPB Datasheet

MFR RecommendedRFQ

OPA2344UA

Texas InstrumentsIn Stock: 3102OPA2344UA Datasheet

MFR RecommendedRFQ

MCP6272-E/P

Microchip TechnologyIn Stock: 2088MCP6272-E/P Datasheet

MFR RecommendedRFQ

MCP6275-E/P

Microchip TechnologyIn Stock: 2646MCP6275-E/P Datasheet

MFR RecommendedRFQ

RE46C312E8F

Microchip TechnologyIn Stock: 781RE46C312E8F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the OPA2344PA is determined by the following critical parameters:

Package Compatibility: The OPA2344PA uses an 8-DIP through-hole package. Substitute parts must maintain identical or mechanically compatible packaging to ensure direct board-level replacement without layout modifications.

Electrical Specifications: Substitute parts must support dual-channel configuration with rail-to-rail output capability. The supply voltage range (2.5V to 5.5V minimum) establishes the lower boundary for compatible devices. Operating temperature range (-40°C to 85°C) defines the thermal operating envelope.

Performance Characteristics: The slew rate (0.8V/µs), gain bandwidth product (1 MHz), input bias current (0.2 pA), and input offset voltage (200 µV) characterize the OPA2344PA's signal fidelity and speed. Substitute parts may exceed these specifications without functional incompatibility, provided they maintain the same package footprint and supply voltage compatibility.

Compliance & Status: All substitute parts must carry ROHS3 compliance and REACH unaffected status to meet current regulatory requirements. Active product status is preferred for long-term availability, though this does not preclude consideration of functionally equivalent alternatives.

Substitutes are grouped into two categories:

Category 1 - Direct Package Equivalent (8-DIP Through Hole): OPA2344UA (surface-mount variant excluded from this category), LM6142BIN/NOPB, MCP6272-E/P, MCP6275-E/P, and RE46C312E8F maintain the 8-DIP through-hole package format.

Category 2 - Package Variant: OPA2344UA uses 8-SOIC surface-mount packaging and requires PCB redesign; therefore, it is suitable only when surface-mount conversion is planned.

Parameter Comparison

Engineering Selection Recommendations

For Direct Through-Hole Replacement (No PCB Redesign):

The LM6142BIN/NOPB, MCP6272-E/P, and MCP6275-E/P are functionally compatible 8-DIP through-hole substitutes. All three maintain ROHS3 compliance and active product status. The LM6142BIN/NOPB offers enhanced slew rate (25V/µs) and bandwidth (18 MHz) compared to the OPA2344PA, suitable for applications requiring faster signal response. The MCP6272-E/P and MCP6275-E/P provide moderate performance improvements (0.9V/µs slew rate, 2 MHz bandwidth) with extended operating temperature range (-40°C to 125°C) and lower minimum supply voltage (2V), expanding application flexibility.

For Surface-Mount Conversion:

The OPA2344UA is the direct electrical equivalent of the OPA2344PA, maintaining identical CMOS architecture, slew rate, bandwidth, and input characteristics. This part is available in 8-SOIC surface-mount packaging and carries active product status. Selection of OPA2344UA requires PCB layout modification to accommodate the SOIC footprint but eliminates performance trade-offs.

For Ultra-Low Power Applications:

The RE46C312E8F is suitable only for applications where extremely low supply current (0.6 µA) is the primary design constraint. This device exhibits significantly reduced slew rate (0.003V/µs) and bandwidth (10 kHz), restricting its use to DC or very low-frequency signal processing. Operating temperature range (-10°C to 60°C) is narrower than the OPA2344PA. This part is not recommended for general-purpose replacement.

Compliance Verification:

All substitute parts carry ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements. Active product status for LM6142BIN/NOPB, OPA2344UA, MCP6272-E/P, and MCP6275-E/P ensures long-term availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can the OPA2344UA be used as a direct replacement for the OPA2344PA without circuit modification?

A: The OPA2344UA is electrically identical to the OPA2344PA but uses 8-SOIC surface-mount packaging instead of 8-DIP through-hole packaging. Direct board-level substitution is not possible without PCB redesign. However, the electrical performance is identical, making it suitable for new designs or boards undergoing layout revision.

Q: What is the primary difference between the LM6142BIN/NOPB and the OPA2344PA?

A: The LM6142BIN/NOPB maintains the same 8-DIP through-hole package and rail-to-rail output capability. Key differences include higher slew rate (25V/µs vs. 0.8V/µs), higher bandwidth (18 MHz vs. 1 MHz), higher input bias current (174 nA vs. 0.2 pA), and wider supply voltage range (1.8V to 24V vs. 2.5V to 5.5V). The LM6142BIN/NOPB is suitable for applications requiring faster signal response.

Q: Are MCP6272-E/P and MCP6275-E/P interchangeable?

A: Yes. Both parts are manufactured by Microchip Technology, share identical electrical specifications (0.9V/µs slew rate, 2 MHz bandwidth, 170 µA supply current), and use the same 8-DIP through-hole package. They are functionally equivalent for the purposes of substituting the OPA2344PA.

Q: Why is the RE46C312E8F listed as a substitute if its performance is significantly lower?

A: The RE46C312E8F is included because it meets the core substitution criteria: dual-channel configuration, rail-to-rail output, 8-DIP through-hole package, and ROHS3 compliance. However, its extremely low bandwidth (10 kHz) and slew rate (0.003V/µs) restrict its application to DC or very low-frequency signal processing. It is not recommended for general-purpose replacement of the OPA2344PA.

Q: What is the operating temperature range limitation of the RE46C312E8F?

A: The RE46C312E8F operates from -10°C to 60°C, which is narrower than the OPA2344PA range of -40°C to 85°C. This device is not suitable for applications requiring extended low-temperature operation below -10°C or high-temperature operation above 60°C.

Q: Can I use the LM6142BIN/NOPB in a circuit designed for the OPA2344PA without circuit redesign?

A: The LM6142BIN/NOPB is pin-compatible and uses the same 8-DIP through-hole package, allowing direct board-level substitution. However, the significantly higher slew rate and bandwidth may affect circuit behavior in applications with tight frequency response specifications or noise-sensitive designs. Circuit validation is necessary to confirm compatibility with the specific application.

Q: What is the minimum supply voltage for each substitute part?

A: OPA2344PA: 2.5V; LM6142BIN/NOPB: 1.8V; OPA2344UA: 2.5V; MCP6272-E/P: 2V; MCP6275-E/P: 2V; RE46C312E8F: 1.8V. Applications operating at 2.5V or higher can use any substitute. Applications operating below 2.5V are limited to LM6142BIN/NOPB, MCP6272-E/P, MCP6275-E/P, or RE46C312E8F.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (LM6142BIN/NOPB, OPA2344UA, MCP6272-E/P, MCP6275-E/P, and RE46C312E8F) carry ROHS3 compliance and REACH unaffected status.