CDC328AD Clock Fanout Buffer - Equivalent & Substitute Parts

Part Overview

The CDC328AD is an active clock fanout buffer (distribution) IC manufactured by Texas Instruments, designed for high-speed clock distribution applications. This 1:6 fanout buffer operates at frequencies up to 100 MHz with TTL-compatible input and output levels, housed in a 16-SOIC surface mount package. The part is currently in active production status with 1493 units available in inventory. Substitute parts are identified when design requirements necessitate alternative sourcing due to inventory constraints, supply chain considerations, or equivalent functional performance needs.

Substiute Parts

CDC328AD

Texas InstrumentsIn Stock: 1561CDC328AD Datasheet

Current PartRFQ

CDC391D

Texas InstrumentsIn Stock: 842CDC391D Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CDC328AD are identified based on strict parametric equivalence across the following critical specifications:

• Fanout Ratio: 1:6 input-to-output configuration
• Maximum Frequency: 100 MHz operation capability
• Logic Levels: TTL input and TTL output compatibility
• Supply Voltage Range: 4.75V to 5.25V
• Package Type: 16-SOIC surface mount form factor
• Temperature Range: -40°C to 85°C operating window
• Differential Characteristics: Non-differential input and output

The CDC391D qualifies as a parametric equivalent substitute, meeting all electrical and mechanical specifications required for direct functional replacement in clock distribution applications.

Parameter Comparison

Engineering Selection Recommendations

Both CDC328AD and CDC391D are active production parts from Texas Instruments with identical electrical and mechanical specifications. Selection between these parts should be based on:

Inventory Availability: CDC328AD has 1493 units in stock, while CDC391D has 744 units available. Choose based on project lead time requirements and supply chain strategy.

Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, suitable for applications requiring environmental regulatory adherence.

Moisture Sensitivity: Both parts carry MSL rating 1 (Unlimited), indicating no moisture sensitivity constraints during storage or handling.

Supply Chain Continuity: Either part provides equivalent functional performance for clock distribution applications requiring 1:6 fanout at 100 MHz with TTL logic levels.

Frequently Asked Questions (FAQ)

Q: Can CDC391D be used as a direct replacement for CDC328AD?

A: Yes. The CDC391D meets all parametric requirements for direct substitution, including fanout ratio, frequency capability, logic levels, supply voltage, temperature range, and package configuration.

Q: Are there any differences in pin configuration between these parts?

A: No differences are specified in the provided parameters. Both parts use the 16-SOIC package with identical electrical specifications.

Q: What determines if a part qualifies as a substitute?

A: Substitution eligibility is based on matching the following parameters: 1:6 fanout ratio, 100 MHz maximum frequency, TTL input/output logic, 4.75V-5.25V supply voltage, -40°C to 85°C operating temperature, and 16-SOIC surface mount package.

Q: Do both parts have the same moisture sensitivity level?

A: Yes. Both CDC328AD and CDC391D carry MSL rating 1 (Unlimited), indicating no moisture sensitivity restrictions.

Q: Which part should be selected for new designs?

A: Selection should be based on current inventory availability and supply chain requirements. Both parts are active production items with equivalent performance characteristics.