89HT0808PYAAB Equivalent & Substitute Parts

Part Overview

The 89HT0808PYAAB is a specialized signal retimer interface IC manufactured by Renesas Electronics Corporation, housed in a 100-CABGA (9x9) package. This component functions as a signal retimer for high-speed interface applications requiring I2C communication protocols. The product is currently classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing system support and new design implementations.

Substiute Parts

89HT0808PYAAB

Renesas Electronics CorporationIn Stock: 110189HT0808PYAAB Datasheet

Current PartRFQ

PCI2250PCM

Texas InstrumentsIn Stock: 1365PCI2250PCM Datasheet

MFR RecommendedRFQ

PCI2250PCMG4

Texas InstrumentsIn Stock: 2400PCI2250PCMG4 Datasheet

MFR RecommendedRFQ

PM8533B-F3EI

Microchip TechnologyIn Stock: 2374PM8533B-F3EI Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 89HT0808PYAAB is determined by the following critical parameters:

• Category: Interface IC
• Mounting Type: Surface Mount
• Applications: Signal retiming and interface bridging functionality
• Interface Protocol: I2C or equivalent high-speed interface standards
• Regulatory Compliance: ECCN and HTSUS classification alignment
• Moisture Sensitivity: MSL rating compatibility for storage and handling

The three identified substitute parts represent different interface architectures within the specialized interface IC category. Each substitute maintains surface mount compatibility and operates within the same regulatory classification framework (EAR99, HTSUS 8542.39.0001).

Parameter Comparison

Engineering Selection Recommendations

PCI2250PCM (Texas Instruments) is the primary active substitute. This part maintains full ROHS3 compliance, identical MSL rating (3, 168 Hours), and matching ECCN/HTSUS classification. Active product status ensures long-term availability and manufacturer support.

PCI2250PCMG4 (Texas Instruments) is functionally equivalent to PCI2250PCM with identical electrical and mechanical specifications. However, this variant is discontinued at DiGi Electronics, limiting procurement channels. Selection should prioritize PCI2250PCM where availability permits.

PM8533B-F3EI (Microchip Technology) represents an alternative interface architecture (PCIe Switch vs. PCI-to-PCI Bridge). This part is active and ROHS3 compliant but operates under a different ECCN classification (5A991B1) and has a more stringent MSL rating (4, 72 Hours). Selection of this substitute requires verification of regulatory compliance requirements for the target application.

Frequently Asked Questions (FAQ)

Q: Can PCI2250PCM directly replace 89HT0808PYAAB in existing designs?

A: Substitution requires verification of interface protocol compatibility. The 89HT0808PYAAB operates as a signal retimer with I2C interface, while PCI2250PCM functions as a PCI-to-PCI bridge. Functional equivalence depends on system architecture and signal requirements.

Q: What is the significance of the MSL rating difference for PM8533B-F3EI?

A: PM8533B-F3EI carries MSL 4 (72 Hours) versus MSL 3 (168 Hours) for the original part. This indicates more stringent moisture exposure limits during storage and handling. Extended storage periods or high-humidity environments require additional protective measures.

Q: Why does PM8533B-F3EI have a different ECCN classification?

A: ECCN 5A991B1 reflects the PCIe Switch architecture and potential cryptographic or advanced signal processing capabilities. This classification may impose additional export control requirements depending on destination and end-use. Verify compliance with applicable regulations before procurement.

Q: Are PCI2250PCM and PCI2250PCMG4 interchangeable?

A: Yes, these parts are electrically and mechanically identical. The "G4" suffix indicates a specific manufacturing date code or quality grade variant. Selection between them depends solely on availability and procurement channels.

Q: What packaging considerations apply to these substitutes?

A: All substitutes are surface mount components supplied in trays. The original 89HT0808PYAAB uses 100-CABGA (9x9) packaging, while PCI2250 variants use 160-QFP (28x28) packaging. PCB layout and thermal management designs must accommodate the different package footprints and pin configurations.