CS61884-IRZR Equivalent & Substitute Parts

Part Overview

The CS61884-IRZR 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 across -40°C to 85°C. The product is classified as obsolete, making identification of active equivalent parts essential for ongoing system maintenance and new design implementations.

Substiute Parts

CS61884-IRZR

Cirrus Logic Inc.In Stock: 1093CS61884-IRZR Datasheet

Current PartRFQ

82P5088BBG8

Renesas Electronics CorporationIn Stock: 213582P5088BBG8 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

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

• Functional Equivalence: Both parts must function as Line Interface Units (LIU) supporting E1, J1, and T1 interfaces
• Circuit Count: Minimum 8 circuits required to maintain functional parity
• Operating Temperature Range: Must support -40°C to 85°C
• Interface Standards: E1, J1, T1 support is mandatory
• Mounting Type: Surface mount configuration required
• Supply Voltage Compatibility: The substitute must operate within or encompass the original supply voltage range
• Moisture Sensitivity: MSL rating of 3 or better acceptable

The 82P5088BBG8 from Renesas Electronics Corporation meets these substitution criteria as an active product with equivalent functional specifications, though with different packaging (256-BGA vs. 144-LQFP) and modified electrical characteristics.

Parameter Comparison

Engineering Selection Recommendations

The 82P5088BBG8 is the manufacturer-recommended substitute for the obsolete CS61884-IRZR. Selection of this substitute is supported by:

• Product Status: The substitute is active and currently manufactured, ensuring long-term availability and supply chain continuity
• Functional Equivalence: Both components provide identical Line Interface Unit functionality with 8 circuits supporting E1, J1, and T1 standards
• Regulatory Compliance: Both parts maintain REACH Unaffected status and EAR99 classification, ensuring consistent compliance posture
• Environmental Specifications: Identical operating temperature range (-40°C to 85°C) and equivalent moisture sensitivity rating (MSL 3)
• Supply Voltage: The substitute supports 3.3V operation, which overlaps with the original part's supply range, enabling direct functional replacement in 3.3V systems

Package migration from 144-LQFP to 256-BGA requires PCB layout redesign and assembly process validation. Power consumption increases from 1.73 W to 2.57 W, necessitating thermal management review in the target application.

Frequently Asked Questions (FAQ)

Q: Can the 82P5088BBG8 directly replace the CS61884-IRZR without PCB modifications?

A: No. The package change from 144-LQFP (15x15) to 256-BGA (17x17) requires PCB layout redesign, including via placement, trace routing, and thermal management considerations. Pin-to-pin compatibility does not exist between these package types.

Q: What are the key functional differences between these parts?

A: Both parts function identically as 8-circuit Line Interface Units supporting E1, J1, and T1 standards across -40°C to 85°C. The primary differences are packaging format, supply voltage options, and power consumption (1.73 W vs. 2.57 W).

Q: Is the 82P5088BBG8 suitable for 3.14V to 3.47V supply applications?

A: The substitute supports 3.3V operation, which falls within the original part's supply range. However, the substitute does not support the full 3.14V to 3.47V range. Applications requiring operation below 3.3V require additional voltage regulation or alternative component selection.

Q: What is the impact of increased power consumption?

A: Power consumption increases from 1.73 W to 2.57 W. Thermal design must be re-evaluated to ensure adequate heat dissipation in the target application environment.

Q: Are there any supply chain or availability considerations?

A: The 82P5088BBG8 is an active product with 2100 pieces in stock, providing immediate availability. The CS61884-IRZR is obsolete with limited remaining inventory (1053 pieces), making transition to the substitute necessary for long-term production continuity.

Q: Do both parts have identical regulatory compliance?

A: Yes. Both parts maintain REACH Unaffected status, EAR99 export classification, and MSL 3 moisture sensitivity rating, ensuring consistent regulatory and environmental compliance.