Equivalent & Substitute Parts for 1894KI-33LF

Part Overview

The 1894KI-33LF is an Ethernet Physical Layer Controller manufactured by Renesas Electronics Corporation, designed for 10/100 Base-T/TX PHY applications with parallel interface connectivity. This component operates within a supply voltage range of 3.14V to 3.47V and is housed in a 32-QFN (5x5) package with exposed pad. The product is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations.

Substiute Parts

1894KI-33LF

Renesas Electronics CorporationIn Stock: 7521894KI-33LF Datasheet

Current PartRFQ

DP83867ISRGZT

Texas InstrumentsIn Stock: 1569DP83867ISRGZT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1894KI-33LF is determined by the following critical parameters:

• Protocol Compatibility: Both main and substitute parts must support Ethernet protocol
• Functional Role: Physical Layer Controller functionality must be maintained
• Operating Temperature Range: Substitute must support -40°C to 85°C minimum
• Moisture Sensitivity Level: MSL 3 classification must be matched or exceeded
• Supply Voltage Compatibility: Substitute voltage requirements must be compatible with system design constraints
• Standards Support: Substitute must support at minimum 10/100 Base-TX PHY standards

The DP83867ISRGZT from Texas Instruments meets these substitution criteria as an active Ethernet Physical Layer Controller with equivalent operating temperature range, MSL classification, and protocol support. While the DP83867ISRGZT offers enhanced functionality (10/100/1000 Base-TX PHY) and different interface architecture (serial vs. parallel), it fulfills the core physical layer control requirements for Ethernet applications.

Parameter Comparison

Engineering Selection Recommendations

The DP83867ISRGZT is designated as the manufacturer-recommended substitute for the 1894KI-33LF. Selection of this substitute is supported by the following factors:

• Product Status: The DP83867ISRGZT maintains active product status, ensuring continued availability and manufacturer support, whereas the 1894KI-33LF is obsolete
• Regulatory Compliance: Both components share identical REACH and ECCN classifications, maintaining compliance posture across supply chain transitions
• Environmental Classification: Matching MSL 3 ratings ensure equivalent moisture handling and storage requirements
• Temperature Operating Range: Identical -40°C to 85°C specifications maintain thermal performance equivalence
• Protocol Support: The DP83867ISRGZT's enhanced 10/100/1000 Base-TX PHY standard provides forward compatibility while maintaining 10/100 Base-TX operation

Interface architecture differences (parallel vs. serial) and package form factor changes (32-QFN vs. 48-VQFN) require circuit-level design modifications and PCB layout adjustments.

Frequently Asked Questions (FAQ)

Q: Can the DP83867ISRGZT directly replace the 1894KI-33LF without circuit modifications?

A: No. While both components function as Ethernet Physical Layer Controllers with equivalent operating temperature and environmental ratings, the DP83867ISRGZT uses serial interface architecture compared to the 1894KI-33LF's parallel interface. Additionally, the package form factor differs (48-VQFN vs. 32-QFN), requiring PCB layout redesign and interface signal routing modifications.

Q: What are the key compatibility parameters for substitution?

A: Substitution compatibility is determined by protocol (Ethernet), functional role (Physical Layer Controller), operating temperature range (-40°C to 85°C minimum), MSL classification (3), and standards support (minimum 10/100 Base-TX PHY). Supply voltage requirements must be evaluated against system design specifications.

Q: Why is the DP83867ISRGZT recommended despite interface differences?

A: The DP83867ISRGZT is the manufacturer-recommended substitute because it maintains active product status, ensures regulatory compliance equivalence, and provides enhanced functionality (10/100/1000 Base-TX PHY support) while meeting all core substitution criteria. The interface and package differences are design considerations rather than substitution barriers.

Q: Are there moisture sensitivity or storage requirement differences?

A: Both components carry identical MSL 3 (168 Hours) classifications, indicating equivalent moisture sensitivity levels and storage handling requirements. No differences exist in this parameter.

Q: What supply voltage considerations apply to substitution?

A: The 1894KI-33LF operates at 3.14V to 3.47V, while the DP83867ISRGZT requires multiple supply voltages (2.375V to 2.625V, 1.71V to 1.89V, and 0.95V to 1.155V). System power delivery architecture must be evaluated to support the substitute component's voltage requirements.