DS1878T-T SFP+ Controller Equivalent & Substitute Parts

Part Overview

The DS1878T-T is an SFP+ Controller integrated circuit manufactured by Analog Devices Inc./Maxim Integrated, designed for interface applications requiring digital and analog signal processing. This component operates as a controller with digital load driver and receiver functionality in a 28-pin thin quad flat no-lead (TQFN) package. The DS1878T-T is classified as obsolete, making identification of functionally equivalent active alternatives essential for new designs and production continuity.

Substiute Parts

DS1878T-T

Analog Devices Inc./Maxim IntegratedIn Stock: 1111DS1878T-T Datasheet

Current PartRFQ

DS1878T+T

Analog Devices Inc./Maxim IntegratedIn Stock: 2349DS1878T+T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DS1878T-T is determined by strict equivalence across the following critical parameters:

• Device Type: SFP+ Controller functionality
• Package Compatibility: 28-WFQFN Exposed Pad (28-TQFN 5x5)
• Electrical Specifications: Input type (Analog, Digital), Output type (Digital), Supply current (2.5 mA), Operating temperature range (-40°C to 95°C)
• Compliance Standards: RoHS3 Compliant, REACH Unaffected, MSL 1
• Manufacturer: Analog Devices Inc./Maxim Integrated

The DS1878T+T qualifies as a direct substitute based on identical electrical characteristics, package specifications, and compliance certifications. The primary distinction is product status and packaging format.

Parameter Comparison

Engineering Selection Recommendations

The DS1878T+T is the active equivalent for the obsolete DS1878T-T. Both components share identical electrical specifications, package geometry, and regulatory compliance certifications. The DS1878T+T is currently in active production status with higher inventory availability (2300 pcs vs. 1077 pcs), making it the preferred selection for new designs and production orders.

The packaging format difference (Tube vs. Tape & Reel) does not affect functional compatibility or circuit performance. Selection between these variants should be based on assembly process requirements and supply chain logistics.

Frequently Asked Questions (FAQ)

Q: Can the DS1878T+T directly replace the DS1878T-T in existing designs?

A: Yes. Both parts are electrically and mechanically identical. They share the same 28-TQFN (5x5) package footprint, pin configuration, electrical characteristics, and operating specifications. No circuit modifications are required.

Q: What is the difference between DS1878T-T and DS1878T+T?

A: The primary differences are product status and packaging format. The DS1878T-T is obsolete and supplied in tube packaging. The DS1878T+T is active production and supplied in tape & reel format. Electrical and functional specifications are identical.

Q: Are there any compliance or certification differences?

A: No. Both parts maintain identical RoHS3 compliance, REACH unaffected status, and MSL 1 moisture sensitivity level. Regulatory certifications are equivalent.

Q: Does the tape & reel packaging affect circuit performance?

A: No. Packaging format (tube vs. tape & reel) is a supply and assembly consideration only. It does not impact electrical performance, reliability, or functional operation.

Q: What supply current should be specified for circuit design?

A: Both the DS1878T-T and DS1878T+T operate at 2.5 mA supply current. This specification applies to both variants and should be used for power budget calculations.

Q: Are there any temperature range limitations?

A: Both parts operate across the identical temperature range of -40°C to 95°C. No derating or thermal management differences exist between the two variants.