CDC391DG4 Clock Fanout Buffer - Equivalent & Substitute Parts

Part Overview

The CDC391DG4 is a Clock Fanout Buffer (Distribution) IC manufactured by Texas Instruments, designed for 1:6 clock distribution applications with a maximum frequency of 100 MHz. This component features TTL-level input and output, operates across a 4.75V to 5.25V supply voltage range, and is housed in a 16-SOIC surface mount package.

The CDC391DG4 has been discontinued at DiGi Electronics. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production and repair applications.

Substiute Parts

CDC391DG4

Texas InstrumentsIn Stock: 1011CDC391DG4 Datasheet

Current PartRFQ

CDC391D

Texas InstrumentsIn Stock: 842CDC391D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CDC391DG4 is determined by strict equivalence across the following critical parameters:

• Fanout Buffer Type: 1:6 distribution configuration
• Logic Levels: TTL input and TTL output
• Maximum Frequency: 100 MHz minimum capability
• Supply Voltage Range: 4.75V ~ 5.25V
• Package Type: 16-SOIC surface mount form factor
• Operating Temperature Range: -40°C ~ 85°C minimum
• Electrical Compliance: ROHS3 and REACH compliance status

The CDC391D qualifies as a direct substitute based on identical electrical specifications, package configuration, and compliance certifications. The primary distinction is product status and packaging format.

Parameter Comparison

Engineering Selection Recommendations

The CDC391D is the direct substitute for the CDC391DG4. Both components share identical electrical specifications, package geometry, and compliance certifications. The CDC391D maintains active product status with current manufacturing support, whereas the CDC391DG4 has been discontinued.

Selection of the CDC391D is appropriate for new designs, production restocking, and field replacements where the CDC391DG4 is no longer available. Both components meet ROHS3 and REACH compliance requirements and carry MSL Level 1 moisture sensitivity ratings, indicating no special storage or handling requirements beyond standard component practices.

Frequently Asked Questions (FAQ)

Q: Can the CDC391D directly replace the CDC391DG4 in existing designs?

A: Yes. The CDC391D is electrically and mechanically identical to the CDC391DG4. Both components feature the same 1:6 fanout buffer configuration, TTL logic levels, 100 MHz maximum frequency, 16-SOIC package, and operating specifications. No circuit modifications are required.

Q: What is the difference between CDC391DG4 and CDC391D?

A: The primary differences are product status and packaging format. The CDC391DG4 is discontinued, while the CDC391D remains in active production. The CDC391D is supplied in tube packaging, whereas the CDC391DG4 was supplied in bulk format. Electrical performance and pin configuration are identical.

Q: Are there any compliance or certification differences?

A: No. Both the CDC391DG4 and CDC391D carry identical ROHS3 compliance and REACH unaffected status. Both components have MSL Level 1 moisture sensitivity ratings.

Q: What is the 16-SOIC package specification?

A: The 16-SOIC (Small Outline Integrated Circuit) package measures 0.154 inches (3.90mm) in width. This is a surface mount package with 16 pins. Both substitute parts use this identical package configuration.

Q: Can this component operate at frequencies above 100 MHz?

A: No. The maximum specified frequency for both the CDC391DG4 and CDC391D is 100 MHz. Operation above this frequency is outside the component's rated specifications.

Q: What supply voltage range is required?

A: Both components require a supply voltage between 4.75V and 5.25V. This narrow range is typical for TTL-level logic components and must be maintained for proper operation.