LP2997M DDR-II Termination Regulator - Equivalent & Substitute Parts

Part Overview

The LP2997M is a DDR-II termination regulator integrated circuit manufactured by Texas Instruments, housed in an 8-SOIC surface mount package. This power management IC is designed specifically for DDR-II memory termination applications, operating across a 2.2V to 5.5V supply voltage range with a supply current of 320µA. The LP2997M is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations where legacy compatibility is required.

Substiute Parts

LP2997M

Texas InstrumentsIn Stock: 5767LP2997M Datasheet

Current PartRFQ

LP2997M/NOPB

National SemiconductorIn Stock: 4218LP2997M/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LP2997M is determined by strict alignment across the following critical parameters:

• Functional Application: DDR-II termination regulation
• Package Type: 8-SOIC form factor with identical 0.154" (3.90mm) width
• Electrical Specifications: Supply voltage range 2.2V ~ 5.5V, supply current 320µA
• Operating Temperature Range: 0°C ~ 125°C
• Mounting Technology: Surface mount configuration
• Base Product Number: LP2997 series designation

The LP2997M/NOPB qualifies as a direct substitute based on complete alignment with all specified electrical and mechanical parameters. This part maintains identical functional characteristics, package geometry, and performance specifications required for DDR-II termination applications.

Parameter Comparison

Engineering Selection Recommendations

The LP2997M/NOPB serves as a direct functional equivalent for the obsolete LP2997M. Both parts share identical electrical specifications, package geometry, and thermal operating ranges. The primary distinction is product status: the LP2997M is obsolete while the LP2997M/NOPB maintains active production status through National Semiconductor.

For new designs or system replacements requiring DDR-II termination regulation, the LP2997M/NOPB is the appropriate selection due to its active availability and compliance with current manufacturing standards. Both parts maintain ROHS3 compliance and identical export classification (EAR99), ensuring regulatory consistency across applications.

Frequently Asked Questions (FAQ)

Q: Can the LP2997M/NOPB be used as a direct replacement for the LP2997M?

A: Yes. Both parts are electrically and mechanically identical, sharing the same 8-SOIC package, supply voltage range (2.2V ~ 5.5V), supply current (320µA), and operating temperature range (0°C ~ 125°C). The LP2997M/NOPB is the active production equivalent.

Q: What is the significance of the "/NOPB" suffix in LP2997M/NOPB?

A: The "/NOPB" designation indicates the part is supplied without plumbum (lead-free), reflecting RoHS compliance in the packaging specification. This does not affect functional compatibility with the original LP2997M.

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

A: No. Both parts use identical 8-SOIC packaging with 0.154" (3.90mm) width. PCB footprints, solder reflow profiles, and mounting procedures remain unchanged.

Q: What is the moisture sensitivity level for these parts?

A: Both the LP2997M and LP2997M/NOPB carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: Why is the LP2997M classified as obsolete?

A: The LP2997M has reached end-of-life status with Texas Instruments. The LP2997M/NOPB, produced by National Semiconductor, represents the active continuation of this product line for DDR-II termination applications.