CDCU2A877ZQLR Equivalent & Substitute Parts

Part Overview

The CDCU2A877ZQLR is a PLL clock driver IC manufactured by Texas Instruments, designed for DDR2 memory applications. This device functions as a zero-delay buffer and multiplexer, providing clock distribution with a 1:10 input-to-output ratio at frequencies up to 410MHz. The part operates at 1.8V supply voltage and is packaged in a 52-BGA MICROSTAR JUNIOR format (7x4.5mm).

The CDCU2A877ZQLR is classified as obsolete. Identifying equivalent substitute parts is necessary for system redesign, production continuation, and long-term supply chain management when original inventory becomes unavailable.

Substiute Parts

CDCU2A877ZQLR

Texas InstrumentsIn Stock: 2098CDCU2A877ZQLR Datasheet

Current PartRFQ

98ULPA877AHT

Renesas Electronics CorporationIn Stock: 83598ULPA877AHT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CDCU2A877ZQLR must satisfy the following critical parameters to ensure functional and mechanical compatibility:

• Maximum frequency: 410MHz or higher
• Supply voltage range: 1.7V ~ 1.9V
• PLL functionality: Required
• Input-to-output ratio: 1:10
• Differential input and output: Yes/Yes
• Package type: 52-VFBGA or equivalent 52-BGA footprint
• Single circuit configuration
• DDR2 memory application support
• Surface mount technology

The 98ULPA877AHT from Renesas Electronics Corporation meets these substitution criteria. Both parts share identical electrical specifications for frequency, voltage supply, circuit count, ratio, and differential signaling. Both are packaged in 52-BGA configurations with compatible footprints (MICROSTAR JUNIOR 7x4.5mm versus CABGA 4.5x7.0mm), ensuring PCB-level compatibility.

Parameter Comparison

Engineering Selection Recommendations

The 98ULPA877AHT is a direct functional substitute for the CDCU2A877ZQLR. Both parts are electrically and mechanically equivalent across all critical parameters: frequency, voltage supply, circuit configuration, input-output ratio, and differential signaling.

The primary distinction is product status: the CDCU2A877ZQLR is obsolete, while the 98ULPA877AHT is active. This status difference is significant for long-term supply chain planning and component availability.

Compliance considerations differ between the two parts. The CDCU2A877ZQLR carries RoHS3 compliance and REACH unaffected status. The 98ULPA877AHT is RoHS non-compliant and also REACH unaffected. Both parts carry identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications.

Moisture sensitivity levels differ: the CDCU2A877ZQLR is MSL 2 (1 Year), while the 98ULPA877AHT is MSL 3 (168 Hours). This affects storage and handling requirements.

Frequently Asked Questions (FAQ)

Q: Can the 98ULPA877AHT directly replace the CDCU2A877ZQLR on existing PCBs?

A: Yes. Both parts use 52-BGA packaging with compatible footprints. The MICROSTAR JUNIOR (7x4.5mm) and CABGA (4.5x7.0mm) configurations are mechanically interchangeable for surface mount assembly. Electrical specifications are identical.

Q: What are the key differences between these parts?

A: The primary differences are manufacturer (Texas Instruments versus Renesas Electronics), product status (obsolete versus active), RoHS compliance status, and moisture sensitivity level. Electrical and functional specifications are identical.

Q: Why is the 98ULPA877AHT classified as RoHS non-compliant?

A: RoHS compliance status is determined by the manufacturer's certification and product formulation. This information is provided by the manufacturer and reflects the part's regulatory classification at the time of production.

Q: Does the difference in moisture sensitivity level affect substitution?

A: Moisture sensitivity level (MSL) affects storage, handling, and shelf-life requirements. The 98ULPA877AHT (MSL 3, 168 hours) requires more stringent moisture control during storage compared to the CDCU2A877ZQLR (MSL 2, 1 year). Proper handling procedures must be followed according to the respective MSL ratings.

Q: Are there any input signal differences between these parts?

A: The CDCU2A877ZQLR specifies SSTL-18 input, while the 98ULPA877AHT specifies Clock input. Both support the differential input requirement and are compatible with DDR2 clock distribution applications.

Q: What is the inventory status for these parts?

A: The CDCU2A877ZQLR has 2085 pieces available as new original stock. The 98ULPA877AHT has 760 pieces available as new original stock. Availability may change; verify current inventory with your supplier.