CS61884-IRZ Equivalent & Substitute Parts

Part Overview

The CS61884-IRZ is a Telecom Interface IC Line Interface Unit (LIU) manufactured by Cirrus Logic Inc., designed for E1, J1, and T1 telecommunications applications. This 160-pin surface mount device operates at 3.14V to 3.47V supply voltage with 1.73W power consumption across 8 circuits. The product is classified as obsolete, making identification of functionally equivalent alternatives essential for system redesign, legacy support, and procurement planning.

Substiute Parts

CS61884-IRZ

Cirrus Logic Inc.In Stock: 903CS61884-IRZ Datasheet

Current PartRFQ

82P5088BBG

Renesas Electronics CorporationIn Stock: 92182P5088BBG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

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

Functional Equivalence Criteria:

• Function: Line Interface Unit (LIU)
• Interface Standards: E1, J1, T1 support
• Number of Circuits: 8 circuits minimum
• Operating Temperature Range: -40°C ~ 85°C
• Mounting Type: Surface Mount

Electrical Compatibility Criteria:

• Supply Voltage: Must support the operational range or be compatible through voltage regulation
• Power Consumption: Substitute must not exceed system thermal or power budget constraints
• MSL Rating: Must meet or exceed MSL 3 classification

Compliance & Certification:

• REACH Status: REACH Unaffected
• ECCN: EAR99
• HTSUS: 8542.39.0001

The 82P5088BBG from Renesas Electronics Corporation meets these substitution criteria through functional equivalence in LIU operation, identical interface support (E1, J1, T1), matching circuit count (8), and compatible operating temperature range. While package geometry differs (256-PBGA vs. 160-LFBGA), both are surface mount BGA technologies suitable for high-density telecommunications applications.

Parameter Comparison

Engineering Selection Recommendations

The 82P5088BBG is the designated manufacturer-recommended substitute for the CS61884-IRZ. Selection of this alternative is justified by the following factors:

Product Status & Availability: The CS61884-IRZ is obsolete, while the 82P5088BBG maintains active production status, ensuring long-term availability and supply chain continuity.

Functional Compatibility: Both devices perform identical LIU functions across E1, J1, and T1 telecommunications interfaces with 8-circuit configurations and matching operating temperature ranges (-40°C ~ 85°C).

Regulatory Compliance: Both parts maintain identical REACH, ECCN, and HTSUS classifications, ensuring compliance with export control and environmental regulations.

Electrical Considerations: The 82P5088BBG supports dual voltage operation (1.8V, 3.3V) compared to the CS61884-IRZ fixed range (3.14V ~ 3.47V). The substitute exhibits higher power consumption (2.57W vs. 1.73W), requiring thermal and power budget assessment during integration.

Package Transition: The shift from 160-LFBGA to 256-PBGA requires PCB redesign. Both are surface mount BGA technologies with identical MSL 3 moisture sensitivity ratings.

Frequently Asked Questions (FAQ)

Q: Can the 82P5088BBG directly replace the CS61884-IRZ without PCB modification?

A: No. The package geometry differs (160-LFBGA vs. 256-PBGA), requiring PCB redesign. Pin assignments and footprints are not compatible. PCB layout must be updated to accommodate the 256-pin BGA package.

Q: What are the voltage compatibility considerations?

A: The CS61884-IRZ operates at 3.14V ~ 3.47V. The 82P5088BBG supports 1.8V and 3.3V operation. The 3.3V supply of the substitute falls within acceptable tolerance of the original specification. Verify that system power delivery can support the higher power consumption (2.57W vs. 1.73W).

Q: Are both parts RoHS compliant?

A: The CS61884-IRZ status is not specified in the provided data. The 82P5088BBG is ROHS3 compliant. Verify RoHS requirements for your application before selection.

Q: What is the impact of increased power consumption?

A: The 82P5088BBG consumes 0.84W additional power (2.57W vs. 1.73W). Assess thermal management, power supply capacity, and system cooling requirements to ensure the substitute operates within acceptable thermal limits.

Q: Are the MSL ratings equivalent?

A: Yes. Both devices are classified as MSL 3 (168 Hours), indicating identical moisture sensitivity and handling requirements during storage and assembly.

Q: What telecommunications standards are supported?

A: Both the CS61884-IRZ and 82P5088BBG support E1, J1, and T1 interface standards with 8-circuit configurations, ensuring functional equivalence for telecommunications line interface applications.