LM1881MX Video Sync Separator IC - Equivalent & Substitute Parts

Part Overview

The LM1881MX is a video sync separator integrated circuit designed for professional video applications supporting NTSC, PAL, and SECAM standards. This device extracts synchronization signals from composite video inputs and operates across a 5V to 12V supply voltage range in an 8-SOIC surface mount package.

The LM1881MX is classified as obsolete product status. Identifying equivalent and substitute parts is necessary to ensure continued availability for system maintenance, production continuity, and long-term component sourcing strategies.

Substiute Parts

LM1881MX

Texas InstrumentsIn Stock: 38832LM1881MX Datasheet

Current PartRFQ

LM1881MX/NOPB

Texas InstrumentsIn Stock: 81509LM1881MX/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM1881MX is determined by the following critical parameters:

• Manufacturer & Base Product Number: Both the main part and substitute must originate from Texas Instruments and share the LM1881 base product number to ensure functional equivalence.
• Function & Standards Support: The substitute must perform video sync separation and support identical video standards (NTSC, PAL, SECAM).
• Voltage Supply Range: The substitute must operate within the 5V to 12V supply voltage specification.
• Package & Mounting: The substitute must use the 8-SOIC surface mount package with identical physical dimensions (0.154", 3.90mm Width).
• Applications: The substitute must be rated for professional video applications.

The LM1881MX/NOPB qualifies as a direct substitute based on these parameters. Both parts share identical functional specifications, electrical characteristics, and physical packaging requirements.

Parameter Comparison

Engineering Selection Recommendations

The LM1881MX/NOPB is a direct functional equivalent to the LM1881MX. Both parts share identical electrical specifications, package dimensions, and application suitability for professional video sync separation.

The primary distinction between these parts is product status and regulatory compliance. The LM1881MX carries obsolete status, while the LM1881MX/NOPB maintains active product status with ROHS3 compliance. The LM1881MX/NOPB is available in higher inventory quantities (81,445 units versus 38,794 units) and is supplied in Cut Tape and Digi-Reel packaging formats.

For new designs and ongoing production requirements, the LM1881MX/NOPB is the appropriate selection due to its active status and regulatory compliance posture. For legacy system maintenance where the original LM1881MX is specified, the LM1881MX/NOPB provides direct substitution without circuit modification or re-qualification.

Frequently Asked Questions (FAQ)

Q: Can the LM1881MX/NOPB replace the LM1881MX in existing designs?

A: Yes. Both parts are functionally identical video sync separators with matching electrical specifications, supply voltage range (5V to 12V), and 8-SOIC package dimensions. Direct substitution is possible without circuit redesign.

Q: What is the significance of the "/NOPB" suffix?

A: The "/NOPB" designation indicates the part is supplied without lead (Pb) and meets ROHS3 compliance requirements. This represents a manufacturing variant of the base LM1881 product line.

Q: Why is the LM1881MX marked as obsolete?

A: Obsolete status indicates Texas Instruments has discontinued active production and support for this specific part number variant. The LM1881MX/NOPB remains in active production as the current equivalent offering.

Q: Are there any package or pinout differences between these parts?

A: No. Both parts use identical 8-SOIC surface mount packaging with 0.154" width (3.90mm). Pinout and electrical interface are identical.

Q: What video standards are supported by these parts?

A: Both the LM1881MX and LM1881MX/NOPB support NTSC, PAL, and SECAM video standards for professional video applications.

Q: Is the LM1881MX/NOPB suitable for new product designs?

A: Yes. The LM1881MX/NOPB is the recommended part for new designs due to its active product status, ROHS3 compliance, and higher inventory availability.