DS2149QN Equivalent & Substitute Parts

Part Overview

The DS2149QN is a Telecom Interface IC functioning as a Line Interface Unit (LIU) manufactured by Analog Devices Inc./Maxim Integrated. This 28-PLCC surface mount device operates within the 4.75V to 5.25V supply voltage range and supports a temperature range of -40°C to 85°C. The DS2149QN is classified as obsolete, making identification of compatible substitute parts essential for ongoing system maintenance and new design implementations where legacy component replacement is required.

Substiute Parts

DS2149QN

Analog Devices Inc./Maxim IntegratedIn Stock: 674DS2149QN Datasheet

Current PartRFQ

DS2149QN+

Analog Devices Inc./Maxim IntegratedIn Stock: 997DS2149QN+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DS2149QN is determined by strict alignment across the following critical parameters:

• Functional Equivalence: Both parts must serve as Line Interface Units (LIU) for telecom applications
• Package Compatibility: Identical 28-PLCC (J-Lead) package with matching physical dimensions (11.51x11.51)
• Electrical Specifications: Matching supply voltage range (4.75V ~ 5.25V) and operating temperature range (-40°C ~ 85°C)
• Base Product Number: Both parts must share the DS2149 base product designation
• Mounting Type: Surface mount configuration must be identical

The DS2149QN+ meets all substitution criteria as a direct equivalent, with the primary distinction being its active product status and improved RoHS compliance profile.

Parameter Comparison

Engineering Selection Recommendations

The DS2149QN+ is a direct functional substitute for the DS2149QN. Both components share identical electrical specifications, package geometry, and mounting characteristics. The DS2149QN+ offers the advantage of active product status, ensuring continued availability and supply chain reliability. Additionally, the DS2149QN+ achieves ROHS3 compliance, meeting modern environmental and regulatory requirements where applicable.

Selection between these parts should be based on system compliance requirements and supply chain considerations. The DS2149QN+ is the preferred choice for new designs and ongoing production where RoHS compliance is mandated or preferred.

Frequently Asked Questions (FAQ)

Q: Can the DS2149QN+ be used as a direct replacement for the DS2149QN in existing designs?

A: Yes. Both parts are electrically and mechanically equivalent, sharing identical supply voltage ranges (4.75V ~ 5.25V), operating temperature specifications (-40°C ~ 85°C), and 28-PLCC package dimensions. Pin-for-pin compatibility is maintained.

Q: What is the primary difference between DS2149QN and DS2149QN+?

A: The DS2149QN+ is an active product with ROHS3 compliance, while the DS2149QN is obsolete and RoHS non-compliant. Both maintain identical functional and electrical characteristics.

Q: Are there any handling or storage differences between these parts?

A: The DS2149QN has MSL 1 (Unlimited moisture sensitivity), while the DS2149QN+ has MSL 3 (168 Hours). The DS2149QN+ requires standard moisture control during storage and handling per IPC standards for MSL 3 components.

Q: Is the 28-PLCC package identical between both parts?

A: Yes. Both parts use the 28-PLCC (J-Lead) package with matching dimensions of 11.51x11.51 mm, ensuring identical PCB footprint and mounting compatibility.

Q: Which part should be selected for new production designs?

A: The DS2149QN+ is recommended for new designs due to its active product status, ensuring long-term availability, and ROHS3 compliance for regulatory alignment.