CDCDB803RSLR Equivalent & Substitute Parts

Part Overview

The CDCDB803RSLR is an active clock buffer integrated circuit manufactured by Texas Instruments, classified within the Clock/Timing component category. This device functions as a 1:8 clock distribution buffer with a maximum frequency rating of 250 MHz, designed for high-speed clock distribution applications requiring differential HCSL (High-Speed Current Steering Logic) signal integrity. The part is currently in active production status with 3200 units available in inventory.

Substitute parts become necessary when the primary part number reaches end-of-life status, inventory depletion occurs, or when alternative packaging formats better suit manufacturing requirements. The CDCDB803RSLR is available in Cut Tape (CT) and Digi-Reel® packaging; equivalent devices in alternative packaging configurations provide identical electrical performance while accommodating different assembly processes.

Substiute Parts

CDCDB803RSLR

Texas InstrumentsIn Stock: 3283CDCDB803RSLR Datasheet

Current PartRFQ

CDCDB800RSLR

Texas InstrumentsIn Stock: 16303CDCDB800RSLR Datasheet

Parametric EquivalentRFQ

CDCDB803ERSLR

Texas InstrumentsIn Stock: 5039CDCDB803ERSLR Datasheet

Parametric EquivalentRFQ

CDCDB803ERSLT

Texas InstrumentsIn Stock: 988CDCDB803ERSLT Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CDCDB803RSLR is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Clock buffer topology with 1:8 input-to-output ratio
• Differential HCSL input and output signal compatibility
• Maximum frequency rating of 250 MHz
• Supply voltage range of 3V to 3.6V
• Operating temperature range of -40°C to 105°C

Mechanical Equivalence Requirements:

• 48-pin VFQFN package with exposed pad
• 6x6 mm supplier device package footprint
• Surface mount mounting type

Packaging Format Variations: The CDCDB803RSLR is supplied in Cut Tape (CT) and Digi-Reel® format. Equivalent parts CDCDB803ERSLR and CDCDB803ERSLT are supplied in Tape & Reel (TR) format, representing the same die and electrical performance with alternative packaging for high-volume automated assembly operations.

The part CDCDB800RSLR maintains identical electrical specifications and packaging format (CT/Digi-Reel®) as the primary part, providing direct substitution capability.

Parameter Comparison

Engineering Selection Recommendations

CDCDB800RSLR is the primary substitute for CDCDB803RSLR when inventory of the original part number is depleted. This part maintains identical electrical specifications, package configuration, and Cut Tape/Digi-Reel® packaging format. The CDCDB800RSLR carries significantly higher inventory availability (16200 units) compared to the primary part, making it the preferred selection for high-volume procurement scenarios. Both parts share equivalent product status (Active) and identical compliance classifications.

CDCDB803ERSLR and CDCDB803ERSLT are suitable substitutes when Tape & Reel (TR) packaging is required for automated assembly operations. These parts provide identical electrical performance and package footprint to the primary part. Both devices carry ROHS3 compliance and REACH Unaffected status, providing enhanced environmental compliance documentation compared to the primary part. The CDCDB803ERSLR offers higher inventory availability (5001 units) relative to CDCDB803ERSLT (926 units).

Selection between Cut Tape and Tape & Reel formats depends on manufacturing assembly methodology. Cut Tape format suits manual or semi-automated placement, while Tape & Reel format optimizes high-speed automated pick-and-place operations.

Frequently Asked Questions (FAQ)

Q: Can CDCDB800RSLR be used as a direct replacement for CDCDB803RSLR?

A: Yes. The CDCDB800RSLR provides identical electrical performance across all specified parameters including frequency rating, signal types, voltage supply range, and operating temperature. Both parts use the same 48-VFQFN package and Cut Tape/Digi-Reel® packaging format, enabling direct substitution without circuit redesign.

Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging?

A: Cut Tape packaging supplies individual components on carrier tape, suitable for manual assembly and low-to-medium volume production. Tape & Reel packaging supplies components on continuous reel format, optimized for high-speed automated pick-and-place assembly equipment. Electrical performance and package footprint remain identical between formats.

Q: Are CDCDB803ERSLR and CDCDB803ERSLT electrically identical?

A: Yes. Both parts provide identical electrical specifications and package configuration. The difference lies in packaging format designation and inventory availability. CDCDB803ERSLR carries higher stock levels (5001 units) compared to CDCDB803ERSLT (926 units).

Q: Does the CDCDB803RSLR support PCIe clock distribution applications?

A: The electrical specifications of the CDCDB803RSLR (1:8 clock buffer, 250 MHz maximum frequency, differential HCSL input/output) are compatible with PCIe clock distribution requirements. Detailed application suitability requires review of the device datasheet and specific system timing requirements.

Q: What is the significance of ROHS3 compliance on CDCDB803ERSLR and CDCDB803ERSLT?

A: ROHS3 compliance indicates conformance to the Restriction of Hazardous Substances Directive, restricting specified hazardous materials in electrical and electronic equipment. This certification is relevant for applications subject to European Union environmental regulations. The primary part (CDCDB803RSLR) lists RoHS status as "Not applicable," while the substitute parts carry explicit ROHS3 Compliant designation.

Q: Can these parts be used interchangeably in existing PCB designs?

A: Yes. All substitute parts maintain identical 48-VFQFN package footprint and 6x6 mm dimensions, enabling direct PCB layout compatibility. No circuit modifications or layout changes are required when substituting between CDCDB803RSLR, CDCDB800RSLR, CDCDB803ERSLR, and CDCDB803ERSLT.

Q: What inventory considerations should guide part selection?

A: CDCDB800RSLR offers the highest inventory availability (16200 units), providing supply security for large-volume production runs. CDCDB803ERSLR (5001 units) provides adequate stock for medium-volume applications requiring Tape & Reel format. CDCDB803ERSLT (926 units) carries the lowest inventory and should be selected only when Tape & Reel format is mandatory and other options are unavailable.