CDCFR83DBQ Equivalent & Substitute Parts

Part Overview

The CDCFR83DBQ is a Memory RDRAM Clock/Frequency Generator IC manufactured by Texas Instruments, operating at 533MHz with a single output in 24-SSOP surface mount packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations. The device functions as a clock generator for Direct RAMBUS memory applications, providing 1:1 input-to-output frequency ratio with PLL functionality.

Substiute Parts

CDCFR83DBQ

Texas InstrumentsIn Stock: 2318CDCFR83DBQ Datasheet

Current PartRFQ

CDCFR83ADBQ

Texas InstrumentsIn Stock: 2295CDCFR83ADBQ Datasheet

DirectRFQ

9212AF-13LF-IN0

Renesas Electronics CorporationIn Stock: 9409212AF-13LF-IN0 Datasheet

MFR RecommendedRFQ

9212AF-13LFT-IN0

Renesas Electronics CorporationIn Stock: 10009212AF-13LFT-IN0 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the CDCFR83DBQ is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Package / Case: 24-SSOP (0.154", 3.90mm Width) — physical compatibility with PCB footprint
• Voltage - Supply: 3.135V ~ 3.465V — power supply compatibility
• Main Purpose: Memory, RDRAM — functional application category
• Number of Circuits: 1 — single output configuration
• Ratio - Input:Output: 1:1 — frequency multiplication factor
• PLL: Yes — phase-locked loop functionality
• Mounting Type: Surface Mount — assembly process compatibility

Allowable Variation Parameters:

• Frequency - Max: Substitute parts may exceed 533MHz provided they maintain backward compatibility with 533MHz operation
• Operating Temperature: Substitute parts may have narrower temperature ranges if the specified range encompasses the application requirement
• Product Status: Active parts are preferred over obsolete parts for long-term availability
• RoHS Status: ROHS3 Compliant maintained across all substitutes

Parameter Comparison

Engineering Selection Recommendations

CDCFR83ADBQ (Direct Substitute - Texas Instruments)

The CDCFR83ADBQ is the primary equivalent for CDCFR83DBQ applications. Both parts share identical electrical specifications (533MHz maximum frequency, 3.135V–3.465V supply voltage, -40°C to 85°C operating temperature) and mechanical packaging (24-SSOP). The critical distinction is product status: CDCFR83ADBQ is active, ensuring long-term availability and supply chain continuity. This part is suitable for direct replacement in existing designs and new implementations requiring Texas Instruments RDRAM clock generation.

9212AF-13LF-IN0 and 9212AF-13LFT-IN0 (Cross-Manufacturer Alternatives - Renesas Electronics Corporation)

These Renesas parts provide functional equivalence for RDRAM clock generation with the following considerations:

• Both operate at 600MHz maximum frequency, exceeding the 533MHz requirement and maintaining backward compatibility
• Supply voltage range (3.135V–3.465V) matches the original specification
• Operating temperature range (0°C–70°C) is narrower than the original (-40°C–85°C); selection requires confirmation that application requirements fall within this range
• Moisture sensitivity level (MSL 1, Unlimited) provides superior moisture protection compared to the original (MSL 2, 1 Year)
• 24-SSOP package maintains PCB footprint compatibility
• Both parts are active products from an established manufacturer

Cross-manufacturer substitution requires functional validation in the target application to confirm signal integrity and timing characteristics.

Frequently Asked Questions (FAQ)

Q: Can CDCFR83ADBQ directly replace CDCFR83DBQ without design changes?

A: Yes. The CDCFR83ADBQ is electrically and mechanically identical to CDCFR83DBQ. Both share the same frequency specification (533MHz), supply voltage range (3.135V–3.465V), operating temperature range (-40°C to 85°C), and 24-SSOP package. The primary difference is product status; CDCFR83ADBQ is active, ensuring availability.

Q: What are the limitations of using Renesas 9212AF parts as substitutes?

A: The Renesas 9212AF-13LF-IN0 and 9212AF-13LFT-IN0 parts operate at 600MHz (higher than the 533MHz specification) and have a narrower operating temperature range (0°C–70°C versus -40°C–85°C). Applications requiring operation below 0°C or above 70°C are not suitable for these parts. Cross-manufacturer substitution requires functional validation to confirm timing and signal integrity in the specific application.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. CDCFR83ADBQ, 9212AF-13LF-IN0, and 9212AF-13LFT-IN0 are all ROHS3 Compliant, maintaining environmental and regulatory compliance with the original part.

Q: What is the difference between 9212AF-13LF-IN0 and 9212AF-13LFT-IN0?

A: Both parts share identical electrical specifications and packaging. The designation difference (LF versus LFT) reflects internal manufacturing or temperature grade variations within the Renesas product line. Consult Renesas documentation for specific distinctions if application-critical.

Q: Does the higher 600MHz frequency of Renesas parts affect compatibility?

A: The higher maximum frequency does not prevent operation at 533MHz. The Renesas parts are capable of generating 533MHz output, making them functionally compatible. However, cross-manufacturer substitution requires validation of phase noise, jitter, and other timing characteristics specific to the application.

Q: What is the significance of MSL (Moisture Sensitivity Level) differences?

A: CDCFR83DBQ and CDCFR83ADBQ have MSL 2 (1 Year), requiring controlled storage and handling. The Renesas parts have MSL 1 (Unlimited), indicating superior moisture resistance and less stringent storage requirements. For applications with extended storage or high-humidity environments, Renesas parts offer practical advantages.