CS61884-IQZ Equivalent & Substitute Parts

Part Overview

The CS61884-IQZ is a Telecom Interface IC functioning as a Line Interface Unit (LIU) manufactured by Cirrus Logic Inc. in a 144-LQFP package. This component supports E1, J1, and T1 interfaces with 8 circuits and operates within a supply voltage range of 3.14V to 3.47V. The product is currently obsolete, making identification of functionally equivalent alternatives essential for system redesign, legacy system maintenance, and component sourcing.

Substiute Parts

CS61884-IQZ

Cirrus Logic Inc.In Stock: 734CS61884-IQZ Datasheet

Current PartRFQ

82P5088BBG

Renesas Electronics CorporationIn Stock: 92182P5088BBG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CS61884-IQZ is determined by the following critical parameters:

• Functional Equivalence: Both the main part and substitute must support Line Interface Unit (LIU) functionality with E1, J1, and T1 interface standards
• Circuit Count: Minimum 8 circuits required to maintain functional parity
• Operating Temperature Range: Must support -40°C to 85°C operational envelope
• Mounting Type: Surface mount technology required for PCB compatibility
• Moisture Sensitivity Level: MSL 3 classification acceptable for equivalent handling and storage requirements
• Supply Voltage Compatibility: Substitute voltage ranges must be compatible with system power delivery architecture

The 82P5088BBG from Renesas Electronics Corporation meets these substitution criteria as an active product with equivalent functional specifications and interface support.

Parameter Comparison

Engineering Selection Recommendations

The 82P5088BBG is the manufacturer-recommended substitute for the obsolete CS61884-IQZ. Selection of this alternative is supported by the following factors:

• Product Status: The 82P5088BBG maintains active product status with ongoing manufacturer support, ensuring long-term availability and supply chain continuity
• Functional Equivalence: Both components provide identical Line Interface Unit functionality with support for E1, J1, and T1 interface standards and 8-circuit configuration
• Compliance Alignment: Both parts maintain identical REACH and ECCN classifications, ensuring regulatory compliance consistency
• Operating Envelope: Identical operating temperature range (-40°C to 85°C) and equivalent moisture sensitivity classification (MSL 3) ensure compatibility with existing system specifications
• Supply Voltage: The 82P5088BBG supports 3.3V operation, which aligns with the 3.14V–3.47V range of the original part and is compatible with standard 3.3V power distribution architectures

Design Considerations: The 82P5088BBG uses a 256-BGA package (17x17) compared to the 144-LQFP package of the original part. This package change requires PCB layout redesign. Power consumption increases from 1.73W to 2.57W, necessitating thermal management review.

Frequently Asked Questions (FAQ)

Q: Can the 82P5088BBG directly replace the CS61884-IQZ without PCB modifications?

A: No. The package change from 144-LQFP (20x20) to 256-BGA (17x17) requires PCB layout redesign, including footprint changes, via placement, and signal routing modifications.

Q: Are the interface standards identical between the two parts?

A: Yes. Both the CS61884-IQZ and 82P5088BBG support E1, J1, and T1 interface standards with 8-circuit configuration.

Q: What is the impact of the increased power consumption?

A: The 82P5088BBG consumes 2.57W compared to 1.73W for the CS61884-IQZ. This 0.84W increase requires evaluation of thermal design, power delivery capacity, and heat dissipation provisions in the target system.

Q: Are both parts compliant with the same regulatory standards?

A: Yes. Both components share identical REACH and ECCN classifications (REACH Unaffected, EAR99), ensuring equivalent regulatory compliance.

Q: What supply voltage should be used with the 82P5088BBG?

A: The 82P5088BBG supports 1.8V and 3.3V operation. For systems originally designed for the CS61884-IQZ (3.14V–3.47V), 3.3V operation is the appropriate selection.

Q: Is the 82P5088BBG available in the same packaging format?

A: No. The 82P5088BBG uses 256-BGA packaging, while the CS61884-IQZ uses 144-LQFP packaging. BGA packages require different assembly and rework procedures compared to LQFP packages.

Q: What is the moisture sensitivity level for both parts?

A: Both components are classified as MSL 3 (168 Hours), indicating identical moisture handling and storage requirements.