LM6181IN Equivalent & Substitute Parts

Part Overview

The LM6181IN is a current feedback amplifier manufactured by Texas Instruments, housed in an 8-DIP package. This device is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design requirements and component procurement. The LM6181IN operates as a single-circuit current feedback amplifier with a slew rate of 2000V/µs and -3dB bandwidth of 100 MHz, designed for applications requiring high-speed signal amplification in through-hole configurations.

Substiute Parts

LM6181IN

Texas InstrumentsIn Stock: 3347LM6181IN Datasheet

Current PartRFQ

LT1252CN8#PBF

Analog Devices Inc.In Stock: 1300LT1252CN8#PBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM6181IN is determined by the following critical parameters:

Functional Equivalence Criteria:

• Amplifier topology: Current feedback architecture
• Circuit count: Single circuit configuration
• Package type: 8-DIP through-hole mounting with 0.300" (7.62mm) pitch
• Pin compatibility: 8-PDIP supplier device package

Performance Compatibility Range:

• Supply voltage span overlap: Minimum 7V to maximum 32V operational range
• Slew rate: Substitute must support high-speed transient response
• Bandwidth: Substitute must accommodate signal frequencies within application requirements
• Output current capability: Substitute must deliver sufficient drive current for load conditions

The LT1252CN8#PBF from Analog Devices Inc. qualifies as a substitute based on identical package configuration, current feedback topology, single-circuit design, and overlapping supply voltage specifications. The substitute maintains through-hole mounting compatibility and operates within the same 8-DIP footprint.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The LM6181IN is classified as obsolete, whereas the LT1252CN8#PBF maintains active product status. Selection of the LT1252CN8#PBF ensures access to current manufacturing, quality assurance, and long-term availability.

Compliance and Certification: The LT1252CN8#PBF is ROHS3 compliant and REACH unaffected, meeting modern regulatory requirements. The LM6181IN is RoHS non-compliant, which may restrict use in applications subject to environmental regulations.

Package and Mounting Compatibility: Both devices utilize identical 8-DIP through-hole packaging with 0.300" (7.62mm) pitch, enabling direct footprint compatibility on printed circuit boards designed for the LM6181IN.

Supply Voltage Compatibility: The LT1252CN8#PBF operates within 4V to 28V single supply or ±2V to ±14V dual supply configuration. The LM6181IN operates within 7V to 32V. Applications requiring supply voltages below 7V single supply are incompatible with the LM6181IN but compatible with the LT1252CN8#PBF.

Frequently Asked Questions (FAQ)

Q: Can the LT1252CN8#PBF be used as a direct replacement for the LM6181IN in existing designs?

A: Direct footprint replacement is possible due to identical 8-DIP package configuration. However, circuit performance differences exist. The LT1252CN8#PBF exhibits higher bandwidth (282 MHz versus 100 MHz) and lower slew rate (125 V/µs versus 2000 V/µs). Output current capability differs (55 mA versus 130 mA). Circuit validation is required to confirm performance compatibility with specific application requirements.

Q: What are the key differences in electrical performance between these devices?

A: The LT1252CN8#PBF provides significantly higher bandwidth, making it suitable for higher-frequency applications. The LM6181IN offers higher slew rate and greater output current drive capability. Supply voltage ranges differ: the LT1252CN8#PBF supports lower minimum supply voltages (4V single supply) compared to the LM6181IN (7V minimum).

Q: Are there supply voltage limitations when substituting the LT1252CN8#PBF?

A: Yes. The LT1252CN8#PBF maximum single supply is 28V, whereas the LM6181IN supports up to 32V. Applications requiring supply voltages between 28V and 32V are incompatible with the LT1252CN8#PBF. The LT1252CN8#PBF supports lower minimum supply voltages (4V) compared to the LM6181IN (7V minimum).

Q: What is the significance of the product status difference?

A: The LM6181IN is obsolete, indicating discontinued manufacturing and potential unavailability. The LT1252CN8#PBF is active, ensuring current production, quality control, and long-term component availability for procurement and warranty support.

Q: How do RoHS compliance differences affect component selection?

A: The LT1252CN8#PBF is ROHS3 compliant, meeting environmental and regulatory requirements for applications subject to RoHS directives. The LM6181IN is RoHS non-compliant, which may restrict use in regulated markets or applications with environmental compliance requirements.

Q: Are there output current limitations to consider?

A: Yes. The LM6181IN provides 130 mA output current per channel, while the LT1252CN8#PBF provides 55 mA. Applications requiring output currents exceeding 55 mA may require external buffering or alternative component selection when using the LT1252CN8#PBF.