LMH6550MMX Equivalent & Substitute Parts

Part Overview

The LMH6550MMX is a voltage feedback operational amplifier manufactured by Texas Instruments, designed for high-speed differential output applications. This device integrates a single amplifier circuit in an 8-VSSOP surface mount package and delivers a slew rate of 3000 V/µs with a -3dB bandwidth of 400 MHz.

The LMH6550MMX 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 systems utilizing this amplifier topology.

Substiute Parts

LMH6550MMX

Texas InstrumentsIn Stock: 1432LMH6550MMX Datasheet

Current PartRFQ

LMH6550MMX/NOPB

Texas InstrumentsIn Stock: 1000LMH6550MMX/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LMH6550MMX is determined by strict equivalence across all electrical and mechanical parameters. The substitute part must satisfy the following criteria:

Electrical Parameter Equivalence:

• Amplifier Type: Voltage Feedback
• Number of Circuits: 1
• Output Type: Differential
• Slew Rate: 3000 V/µs
• -3dB Bandwidth: 400 MHz
• Current - Input Bias: 8 µA
• Voltage - Input Offset: 1 mV
• Current - Supply: 20 mA
• Current - Output / Channel: 75 mA
• Voltage - Supply Span: 4.5 V to 12 V
• Operating Temperature Range: -40°C to 85°C

Mechanical Parameter Equivalence:

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

The LMH6550MMX/NOPB is identified as a direct substitute based on complete electrical and mechanical parameter alignment. The primary distinction between the main part and its substitute is product status and packaging configuration.

Parameter Comparison

Engineering Selection Recommendations

The LMH6550MMX/NOPB is a direct functional equivalent to the LMH6550MMX. Both parts are manufactured by Texas Instruments and share identical electrical and mechanical specifications across all critical parameters.

Product Status Consideration: The LMH6550MMX is classified as obsolete, while the LMH6550MMX/NOPB maintains active product status. For new designs and ongoing production, the LMH6550MMX/NOPB is the appropriate selection to ensure long-term supply chain availability and manufacturer support.

Compliance Consideration: The LMH6550MMX/NOPB is ROHS3 compliant, whereas the LMH6550MMX is RoHS non-compliant. Applications subject to RoHS regulations must utilize the LMH6550MMX/NOPB variant.

Packaging Consideration: The LMH6550MMX/NOPB is supplied in Tape & Reel (TR) configuration, which is standard for automated assembly processes. The original LMH6550MMX may be supplied in alternative packaging formats. Verify packaging requirements with procurement specifications before component selection.

Frequently Asked Questions (FAQ)

Q: Can the LMH6550MMX/NOPB be used as a direct replacement for the LMH6550MMX in existing designs?

A: Yes. The LMH6550MMX/NOPB is electrically and mechanically equivalent to the LMH6550MMX. All electrical parameters, including slew rate, bandwidth, bias current, and supply voltage specifications, are identical. The physical package dimensions and pinout are identical. Direct substitution is supported without circuit modification.

Q: What is the difference between LMH6550MMX and LMH6550MMX/NOPB?

A: The primary differences are product status and compliance certification. The LMH6550MMX is obsolete and RoHS non-compliant. The LMH6550MMX/NOPB is an active product that is ROHS3 compliant. The /NOPB suffix indicates the part is supplied in Tape & Reel packaging without lead (Pb-free). Electrical and mechanical specifications are identical.

Q: Is the 8-VSSOP package compatible with 8-TSSOP and 8-MSOP footprints?

A: The supplier device package designation is 8-VSSOP. The package / case specification indicates 8-TSSOP, 8-MSOP (0.118", 3.00mm Width). These designations refer to the same physical package with identical pinout and dimensions. PCB footprints designed for this package family are compatible.

Q: What are the key electrical parameters that define substitution compatibility for the LMH6550MMX?

A: Substitution compatibility is determined by the following parameters: amplifier type (voltage feedback), number of circuits (1), output type (differential), slew rate (3000 V/µs), -3dB bandwidth (400 MHz), input bias current (8 µA), input offset voltage (1 mV), supply current (20 mA), output current per channel (75 mA), supply voltage range (4.5 V to 12 V), and operating temperature range (-40°C to 85°C). Any substitute part must match all these specifications.

Q: Are there inventory considerations when selecting between LMH6550MMX and LMH6550MMX/NOPB?

A: Current inventory levels differ between the two parts. The LMH6550MMX has 1408 pieces in stock, while the LMH6550MMX/NOPB has 941 pieces in stock. For applications requiring immediate component availability, verify current stock status with your supplier. For long-term production, the active status of LMH6550MMX/NOPB ensures continued availability.