OPA4344PAG4 Equivalent & Substitute Parts

Part Overview

The OPA4344PAG4 is a CMOS rail-to-rail operational amplifier featuring four independent circuits in a 14-pin DIP package. Manufactured by Texas Instruments under the MicroAmplifier™ series, this device is designed for low-power applications requiring precision amplification with rail-to-rail output capability. The part is currently classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement.

Substiute Parts

OPA4344PAG4

Texas InstrumentsIn Stock: 1115OPA4344PAG4 Datasheet

Current PartRFQ

OPA4277PA

Texas InstrumentsIn Stock: 2023OPA4277PA Datasheet

MFR RecommendedRFQ

OPA4344UA

Texas InstrumentsIn Stock: 1425OPA4344UA Datasheet

MFR RecommendedRFQ

MCP6144-E/P

Microchip TechnologyIn Stock: 1118MCP6144-E/P Datasheet

MFR RecommendedRFQ

MCP6144-I/P

Microchip TechnologyIn Stock: 1103MCP6144-I/P Datasheet

MFR RecommendedRFQ

MCP619-I/P

Microchip TechnologyIn Stock: 2080MCP619-I/P Datasheet

MFR RecommendedRFQ

MCP6274-E/P

Microchip TechnologyIn Stock: 1950MCP6274-E/P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OPA4344PAG4 is determined by the following critical parameters:

Primary Substitution Criteria:

• Number of circuits: 4 independent amplifier channels
• Package type: 14-pin DIP form factor (0.300", 7.62mm pitch)
• Mounting technology: Through-hole configuration
• Output capability: Rail-to-rail output stage
• Supply voltage range: Minimum 2.5 V operation
• Operating temperature range: -40°C to 85°C minimum

Secondary Compatibility Parameters:

• Slew rate: 0.8 V/µs or higher
• Gain bandwidth product: 1 MHz or higher
• Input bias current: Low-leakage CMOS or equivalent
• Output current per channel: 15 mA or greater

Substitute parts are grouped into two categories based on amplifier type and performance characteristics:

Category A - CMOS Rail-to-Rail Substitutes (Direct Functional Equivalents):

• OPA4344UA (surface-mount variant of same base product)
• MCP619-I/P (CMOS architecture, rail-to-rail output, lower supply current)

Category B - General Purpose Rail-to-Rail Substitutes (Functional Alternatives):

• MCP6144-E/P and MCP6144-I/P (lower bandwidth, ultra-low supply current)
• MCP6274-E/P (higher bandwidth, higher supply current)
• OPA4277PA (general purpose, wider supply range, higher output current)

Parameter Comparison

Engineering Selection Recommendations

For Direct Through-Hole DIP Package Replacement (Identical Form Factor):

The MCP619-I/P provides the closest functional match while maintaining the 14-DIP through-hole package. This CMOS rail-to-rail amplifier operates within the OPA4344PAG4 supply voltage range (2.3 V to 5.5 V) and temperature range (-40°C to 85°C). The MCP619-I/P exhibits lower supply current consumption (19 µA total versus 150 µA), making it suitable for power-sensitive applications. Input offset voltage is superior at 150 µV compared to 200 µV. Output current capability (17 mA per channel) exceeds the original specification (15 mA). Product status is active with full availability.

The MCP6144-E/P and MCP6144-I/P offer alternative through-hole DIP solutions with ultra-low supply current (0.6 µA total) and extended temperature range to 125°C (MCP6144-E/P only). These general-purpose amplifiers sacrifice bandwidth (100 kHz versus 1 MHz) and slew rate (0.024 V/µs versus 0.8 V/µs) but maintain rail-to-rail output and 14-DIP packaging. Selection depends on application bandwidth requirements.

The MCP6274-E/P provides higher bandwidth (2 MHz) and slew rate (0.9 V/µs) in the same 14-DIP package, with extended temperature range to 125°C. Supply current is moderate at 170 µA. This option suits applications requiring faster signal processing.

For Surface-Mount Alternative (Same Base Product, Different Package):

The OPA4344UA is the surface-mount variant of the OPA4344 base product, offering identical electrical specifications to the OPA4344PAG4 (CMOS, rail-to-rail, 0.8 V/µs slew rate, 1 MHz bandwidth) in a 14-SOIC package. Product status is active. This option is appropriate for new designs or PCB redesigns accommodating surface-mount technology.

For Extended Supply Voltage Range:

The OPA4277PA (general-purpose amplifier) supports supply voltages from 4 V to 36 V, exceeding the OPA4344PAG4 maximum of 5.5 V. This part is suitable for applications requiring higher supply voltages. Output current capability is superior at 35 mA per channel. Product status is last-time-buy, indicating limited future availability.

Compliance and Regulatory Status:

All substitute parts listed are ROHS3 compliant and REACH unaffected, matching the regulatory status of the original OPA4344PAG4. All parts carry ECCN classification EAR99 and HTSUS code 8542.33.0001.

Frequently Asked Questions (FAQ)

Q: Can the OPA4344UA replace the OPA4344PAG4 in existing designs?

A: The OPA4344UA provides identical electrical performance and is the active production variant of the same base product (OPA4344). However, it uses a 14-SOIC surface-mount package instead of the 14-DIP through-hole package. Direct PCB substitution is not possible without redesign. The OPA4344UA is suitable for new designs or boards being redesigned for surface-mount assembly.

Q: Which substitute offers the lowest power consumption?

A: The MCP6144-E/P and MCP6144-I/P offer the lowest supply current at 0.6 µA total (0.15 µA per channel). This represents a 250-fold reduction compared to the OPA4344PAG4 (150 µA total). This advantage comes with reduced bandwidth (100 kHz versus 1 MHz) and slew rate (0.024 V/µs versus 0.8 V/µs).

Q: What is the difference between MCP6144-E/P and MCP6144-I/P?

A: Both parts are functionally identical with the same electrical specifications and 14-DIP package. The primary difference is operating temperature range: MCP6144-E/P operates from -40°C to 125°C, while MCP6144-I/P operates from -40°C to 85°C. Select MCP6144-E/P for applications requiring extended high-temperature operation.

Q: Can I use MCP6274-E/P as a direct replacement for higher-speed applications?

A: The MCP6274-E/P maintains the 14-DIP through-hole package and rail-to-rail output, making it mechanically compatible. It offers higher bandwidth (2 MHz versus 1 MHz) and faster slew rate (0.9 V/µs versus 0.8 V/µs). Supply current is slightly higher at 170 µA versus 150 µA. Operating temperature extends to 125°C. Electrical compatibility is confirmed for applications requiring faster signal processing within the 2 V to 6 V supply range.

Q: Is the OPA4277PA suitable for my application?

A: The OPA4277PA is a general-purpose amplifier with identical 14-DIP through-hole packaging and 4-circuit configuration. Key differences include: wider supply voltage range (4 V to 36 V), higher output current (35 mA per channel), and significantly lower input offset voltage (20 µV versus 200 µV). However, product status is last-time-buy, indicating limited future procurement availability. Use this part only if extended supply voltage range is essential and long-term availability is not a concern.

Q: What are the key parameters I must verify before substitution?

A: Verify the following parameters match your application requirements: (1) supply voltage range compatibility, (2) operating temperature range, (3) required bandwidth and slew rate, (4) output current per channel, (5) input offset voltage and bias current specifications, (6) package form factor (through-hole DIP versus surface-mount SOIC). All substitute parts maintain 4-circuit configuration and rail-to-rail output capability.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed (OPA4344UA, MCP619-I/P, MCP6144-E/P, MCP6144-I/P, MCP6274-E/P, OPA4277PA) are ROHS3 compliant and REACH unaffected, matching the regulatory status of the original OPA4344PAG4.

Q: Which substitute offers the best balance of performance and availability?

A: The MCP619-I/P provides optimal balance: active product status with full availability, identical 14-DIP through-hole package, CMOS architecture matching the original, rail-to-rail output, compatible supply voltage range (2.3 V to 5.5 V), and lower power consumption (19 µA versus 150 µA). Performance specifications (0.8 V/µs slew rate, 190 kHz bandwidth) are comparable to the original, with superior input offset voltage (150 µV versus 200 µV).