CDC340DWRG4 Equivalent & Substitute Parts

Part Overview

The CDC340DWRG4 is a Clock Fanout Buffer (Distribution) IC manufactured by Texas Instruments, designed for 1:8 clock distribution at frequencies up to 80 MHz. This component features TTL-level input and output, operates on a 4.75V to 5.25V supply, and is housed in a 20-SOIC package. The CDC340DWRG4 is classified as obsolete, making identification of active equivalent parts essential for new designs and production continuity.

Substiute Parts

CDC340DWRG4

Texas InstrumentsIn Stock: 871CDC340DWRG4 Datasheet

Current PartRFQ

CDC341DWR

Texas InstrumentsIn Stock: 16160CDC341DWR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDC340DWRG4 is determined by strict equivalence across the following critical parameters:

• Fanout Configuration: 1:8 ratio (one input, eight outputs)
• Logic Levels: TTL input and TTL output
• Maximum Frequency: 80 MHz operation capability
• Supply Voltage Range: 4.75V to 5.25V
• Package Type: 20-SOIC (0.295", 7.50mm Width)
• Operating Temperature Range: 0°C to 70°C
• Compliance Standards: ROHS3 Compliant, REACH Unaffected

The CDC341DWR meets all these parameters and qualifies as a parametric equivalent. The primary distinction is product status: CDC340DWRG4 is obsolete, while CDC341DWR is active and available in production quantities.

Parameter Comparison

Engineering Selection Recommendations

The CDC341DWR is the direct active equivalent for the obsolete CDC340DWRG4. Both components are manufactured by Texas Instruments and share identical electrical specifications, package configuration, and compliance certifications. The CDC341DWR is recommended for new designs and production applications requiring clock fanout distribution at 80 MHz with TTL logic levels.

For legacy systems currently using CDC340DWRG4, the CDC341DWR provides drop-in compatibility without circuit modification, provided that existing inventory of the obsolete part is depleted. The CDC341DWR's active production status and significantly higher inventory availability (16063 units versus 818 units) support long-term supply chain reliability.

Frequently Asked Questions (FAQ)

Q: Can CDC341DWR replace CDC340DWRG4 in existing designs?

A: Yes. The CDC341DWR is electrically and mechanically identical to CDC340DWRG4 across all specified parameters. No circuit modifications are required for substitution.

Q: What is the primary reason to substitute CDC340DWRG4?

A: CDC340DWRG4 is classified as obsolete. CDC341DWR is the active equivalent from Texas Instruments, ensuring continued availability and production support.

Q: Are there any differences in package dimensions between these parts?

A: No. Both components use the 20-SOIC (0.295", 7.50mm Width) package with identical pinout and mechanical specifications.

Q: Do both parts meet the same compliance standards?

A: Yes. Both CDC340DWRG4 and CDC341DWR are ROHS3 Compliant, REACH Unaffected, and carry identical moisture sensitivity ratings (MSL 1 - Unlimited).

Q: What is the maximum operating frequency for both parts?

A: Both components support clock distribution up to 80 MHz with TTL-level input and output signals.

Q: Are the supply voltage requirements identical?

A: Yes. Both parts operate on a 4.75V to 5.25V supply voltage range and share the same 0°C to 70°C operating temperature specification.