LMH6551MMX Equivalent & Substitute Parts

Part Overview

The LMH6551MMX is a voltage feedback operational amplifier manufactured by Texas Instruments, designed for single-circuit differential output applications in linear amplifier configurations. This device is packaged in an 8-VSSOP surface mount package and operates across a supply voltage range of 3V to 12V with an operating temperature range of -40°C to 125°C.

The LMH6551MMX is classified as an obsolete product. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term production requirements for applications currently utilizing this component.

Substiute Parts

LMH6551MMX

Texas InstrumentsIn Stock: 1439LMH6551MMX Datasheet

Current PartRFQ

LMH6551MMX/NOPB

Texas InstrumentsIn Stock: 8519LMH6551MMX/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LMH6551MMX is determined by strict equivalence across the following critical parameters:

Electrical Performance Parameters:

• Amplifier Type: Voltage Feedback
• Number of Circuits: 1
• Output Type: Differential
• Slew Rate: 2400 V/µs
• -3dB Bandwidth: 370 MHz
• Current - Input Bias: 4 µA
• Voltage - Input Offset: 500 µV
• Current - Supply: 12.5 mA
• Current - Output / Channel: 65 mA
• Voltage - Supply Span: 3V to 12V
• Operating Temperature Range: -40°C to 125°C

Mechanical & Packaging Parameters:

• Mounting Type: Surface Mount
• Package / Case: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
• Supplier Device Package: 8-VSSOP

A substitute part must match all electrical performance parameters and mechanical packaging specifications to ensure functional and physical compatibility within existing circuit designs and PCB layouts.

Parameter Comparison

Engineering Selection Recommendations

The LMH6551MMX/NOPB is a direct substitute for the obsolete LMH6551MMX. Both parts share identical electrical performance specifications and mechanical packaging characteristics, ensuring pin-for-pin and functional compatibility.

The primary distinction between these parts is product status and regulatory compliance. The LMH6551MMX is classified as obsolete, while the LMH6551MMX/NOPB maintains active product status from Texas Instruments. Additionally, the LMH6551MMX/NOPB carries ROHS3 compliance certification, whereas the original LMH6551MMX is RoHS non-compliant.

For new designs and ongoing production requiring voltage feedback operational amplifiers with differential output in the 8-VSSOP package, the LMH6551MMX/NOPB is the appropriate selection. For existing applications currently using the LMH6551MMX, transition to the LMH6551MMX/NOPB is supported by complete electrical and mechanical equivalence.

Frequently Asked Questions (FAQ)

Q: Can the LMH6551MMX/NOPB be used as a direct replacement for the LMH6551MMX?

A: Yes. The LMH6551MMX/NOPB is electrically and mechanically equivalent to the LMH6551MMX. All electrical parameters, including slew rate, bandwidth, bias current, offset voltage, supply current, output current, supply voltage range, and operating temperature range are identical. Both parts use the same 8-VSSOP package with identical pinout and mechanical dimensions.

Q: What is the difference between LMH6551MMX and LMH6551MMX/NOPB?

A: The primary differences are product status and regulatory compliance. The LMH6551MMX is obsolete and RoHS non-compliant. The LMH6551MMX/NOPB is an active product with ROHS3 compliance. The "/NOPB" suffix indicates the part is supplied without plumbum (lead-free). Electrical and mechanical specifications are identical.

Q: Are there any package compatibility concerns when substituting these parts?

A: No. Both the LMH6551MMX and LMH6551MMX/NOPB use the 8-VSSOP package with identical dimensions (0.118" width, 3.00mm). PCB footprints, land patterns, and assembly processes are fully compatible.

Q: What is the supply voltage range for these amplifiers?

A: Both parts operate with a supply voltage span from 3V minimum to 12V maximum, supporting single or dual supply configurations within this range.

Q: What is the operating temperature range?

A: Both the LMH6551MMX and LMH6551MMX/NOPB operate across a temperature range of -40°C to 125°C, suitable for industrial and commercial applications.

Q: What are the key electrical characteristics that define this amplifier?

A: The LMH6551MMX and LMH6551MMX/NOPB are single-circuit voltage feedback operational amplifiers with differential output. Key characteristics include a slew rate of 2400 V/µs, -3dB bandwidth of 370 MHz, input bias current of 4 µA, input offset voltage of 500 µV, supply current of 12.5 mA, and output current per channel of 65 mA.