DS2125 Equivalent & Substitute Parts

Part Overview

The DS2125 is a SCSI LVD/SE terminator IC manufactured by Analog Devices Inc./Maxim Integrated, designed to provide 15 terminations in a 48-LQFP surface mount package. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system maintenance and new design implementations. The DS2125 operates across a supply voltage range of 2.7V to 5.5V and maintains performance across the industrial temperature range of 0°C to 70°C.

Substiute Parts

DS2125

Analog Devices Inc./Maxim IntegratedIn Stock: 2176DS2125 Datasheet

Current PartRFQ

UCC5638FQPTR

Texas InstrumentsIn Stock: 10202UCC5638FQPTR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DS2125 is determined by strict alignment across the following critical parameters:

• Functional Type: SCSI, LVD, SE terminator architecture
• Termination Count: 15 terminations required
• Package Specification: 48-LQFP (7x7) surface mount form factor
• Voltage Compatibility: Supply voltage range overlap (minimum 2.7V, maximum ≤5.5V)
• Temperature Range: Operating temperature 0°C to 70°C
• Compliance Standards: ROHS3 compliance and MSL rating

The UCC5638FQPTR from Texas Instruments meets all substitution criteria within these defined parameters.

Parameter Comparison

Engineering Selection Recommendations

The UCC5638FQPTR is a direct functional equivalent to the DS2125 based on matching electrical specifications, package geometry, and compliance certifications. The substitute part is currently in active production status, ensuring long-term availability and supply chain stability compared to the obsolete DS2125.

The upper supply voltage limit of the UCC5638FQPTR is 5.25V versus 5.5V for the DS2125. This 0.25V differential is within acceptable tolerance for standard SCSI terminator applications operating at nominal 5V supply levels.

Both components maintain identical ROHS3 compliance and MSL ratings, supporting equivalent handling and storage requirements in manufacturing environments.

Frequently Asked Questions (FAQ)

Q: Can the UCC5638FQPTR directly replace the DS2125 in existing designs?

A: Yes. Both components share identical package geometry (48-LQFP 7x7), termination count (15), functional type (SCSI LVD/SE), and operating temperature range (0°C to 70°C). Pin-level compatibility is maintained.

Q: What is the significance of the 0.25V difference in maximum supply voltage?

A: The DS2125 supports 2.7V to 5.5V, while the UCC5638FQPTR supports 2.7V to 5.25V. Standard SCSI systems operate at 5V nominal supply. The UCC5638FQPTR remains fully functional within this standard operating window.

Q: Are there differences in packaging format between these parts?

A: The DS2125 is supplied in bulk packaging, while the UCC5638FQPTR is available in Tape & Reel (TR) format. Both formats contain identical components; packaging format selection depends on manufacturing process requirements and order quantities.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the DS2125 and UCC5638FQPTR are ROHS3 compliant with identical Moisture Sensitivity Level (MSL) ratings of 3 (168 Hours), supporting equivalent handling protocols.

Q: Why is the DS2125 listed as obsolete?

A: The DS2125 has been discontinued by Analog Devices Inc./Maxim Integrated. The UCC5638FQPTR from Texas Instruments provides equivalent functionality and is maintained in active production status.