OPA544TG3 Equivalent & Substitute Parts

Part Overview

The OPA544TG3 is a power amplifier integrated circuit manufactured by Texas Instruments, designed for single-circuit power amplification applications in TO-220-5 package configuration. This component is classified as a Last Time Buy product, indicating discontinued production with limited remaining inventory (2124 pcs). The OPA544TG3 operates across a wide supply voltage range of 20V to 70V and delivers 2A output current per channel, making it suitable for precision power amplification in industrial and consumer applications. Due to its Last Time Buy status, identification of functionally equivalent active alternatives is essential for design continuity and long-term supply chain planning.

Substiute Parts

OPA544TG3

Texas InstrumentsIn Stock: 2145OPA544TG3 Datasheet

Current PartRFQ

OPA544T

Texas InstrumentsIn Stock: 4684OPA544T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the OPA544TG3 is determined by strict equivalence across all critical electrical and mechanical parameters. The following parameters establish the substitution criteria:

Electrical Parameters (Must Match):

• Amplifier Type: Power
• Number of Circuits: 1
• Slew Rate: 8 V/µs
• Gain Bandwidth Product: 1.4 MHz
• Current - Input Bias: 15 pA
• Voltage - Input Offset: 1 mV
• Current - Supply: 12 mA
• Current - Output / Channel: 2 A
• Voltage - Supply Span: 20V to 70V
• Operating Temperature Range: -40°C to 85°C

Mechanical Parameters (Must Match):

• Package / Case: TO-220-5
• Mounting Type: Through Hole

Compliance Parameters:

• RoHS Status: ROHS3 Compliant
• REACH Status: REACH Unaffected

The OPA544T qualifies as a direct substitute based on complete parameter alignment across all electrical specifications, package configuration, and regulatory compliance requirements.

Parameter Comparison

Engineering Selection Recommendations

The OPA544T is a direct functional equivalent to the OPA544TG3 and qualifies for substitution based on the following engineering criteria:

Electrical Equivalence: All electrical parameters including slew rate, gain bandwidth product, input bias current, input offset voltage, supply current, output current capability, and supply voltage range are identical between the two parts.

Package Compatibility: Both components utilize the TO-220-5 through-hole package, ensuring mechanical and thermal compatibility with existing PCB designs without layout modifications.

Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying environmental and regulatory requirements for industrial and consumer applications.

Product Status Advantage: The OPA544T carries Active product status with higher available inventory (4613 pcs), providing superior supply chain continuity compared to the Last Time Buy OPA544TG3 (2124 pcs remaining).

Base Product Alignment: Both parts share the identical base product number OPA544, confirming they are variants of the same core design with equivalent performance characteristics.

Frequently Asked Questions (FAQ)

Q: Can the OPA544T directly replace the OPA544TG3 in existing designs?

A: Yes. The OPA544T is a direct substitute with identical electrical specifications, package configuration, and operating parameters. No circuit modifications or PCB redesign are required for substitution.

Q: What is the difference between OPA544TG3 and OPA544T?

A: The primary difference is product status. The OPA544TG3 is Last Time Buy (discontinued), while the OPA544T is Active (currently manufactured). All electrical and mechanical specifications are identical.

Q: Are there any thermal or reliability differences between these parts?

A: No thermal or reliability differences exist. Both parts operate across the same temperature range (-40°C to 85°C) and deliver identical output current (2A per channel) with the same thermal characteristics in the TO-220-5 package.

Q: Can I use the OPA544T in high-temperature applications?

A: Both parts are rated for operation up to 85°C. Applications requiring higher temperature operation require alternative components outside this product family.

Q: Is the TO-220-5 package suitable for my PCB layout?

A: The TO-220-5 is a through-hole package requiring standard PCB mounting holes and thermal management provisions. Verify your PCB design accommodates this package footprint and thermal requirements for 2A output current applications.

Q: What supply voltage range do these amplifiers support?

A: Both the OPA544TG3 and OPA544T support supply voltages from 20V to 70V, providing flexibility for various industrial and consumer power supply configurations.

Q: Are there inventory considerations for long-term production?

A: Yes. The OPA544TG3 has limited remaining inventory (2124 pcs) as a Last Time Buy part. For new designs or long-term production, the OPA544T (Active status, 4613 pcs available) is the recommended selection to ensure supply continuity.