CDC328ADG4 Equivalent & Substitute Parts

Part Overview

The CDC328ADG4 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 input and output logic levels, operates across a 4.75V to 5.25V supply voltage range, and is housed in a 16-SOIC surface mount package.

The CDC328ADG4 is currently 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

CDC328ADG4

Texas InstrumentsIn Stock: 858CDC328ADG4 Datasheet

Current PartRFQ

CDC391D

Texas InstrumentsIn Stock: 842CDC391D Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDC328ADG4 is determined by strict equivalence across the following critical parameters:

• Fanout Configuration: 1:6 input-to-output ratio
• Logic Levels: TTL input and TTL output (non-differential)
• Frequency Specification: 100 MHz maximum operating frequency
• Supply Voltage Range: 4.75V to 5.25V
• Package Specification: 16-SOIC surface mount package with 0.154" width (3.90mm)
• Environmental Compliance: ROHS3 compliance and MSL Level 1 rating

The CDC391D meets all these parameters and qualifies as a parametric equivalent substitute for the CDC328ADG4.

Parameter Comparison

Engineering Selection Recommendations

The CDC391D is the appropriate substitute for the CDC328ADG4 based on complete parametric equivalence. Both components are manufactured by Texas Instruments and share identical electrical specifications, package dimensions, and environmental compliance ratings.

The CDC391D maintains active product status, ensuring ongoing availability and supply chain continuity. Both parts carry ROHS3 compliance and MSL Level 1 ratings, confirming equivalent environmental and handling requirements.

Pin-to-pin compatibility and functional equivalence are established through matching package specifications (16-SOIC), logic levels (TTL input/output), and operational parameters (100 MHz, 4.75V–5.25V supply, -40°C to 85°C temperature range).

Frequently Asked Questions (FAQ)

Q: Can the CDC391D be used as a direct replacement for the CDC328ADG4?

A: Yes. The CDC391D is a parametric equivalent with identical electrical specifications, package type, and pin configuration. Direct substitution is supported without circuit modification.

Q: Are there any differences in supply voltage or operating temperature between these parts?

A: No. Both the CDC328ADG4 and CDC391D operate across the same supply voltage range (4.75V–5.25V) and temperature range (-40°C to 85°C).

Q: Do both parts use the same package?

A: Yes. Both components use the 16-SOIC surface mount package with 0.154" width (3.90mm). PCB footprints and land patterns are identical.

Q: What is the significance of the product status difference?

A: The CDC328ADG4 is discontinued at DiGi Electronics, while the CDC391D maintains active status. This makes the CDC391D the recommended choice for new designs and ongoing production requirements.

Q: Are the RoHS and MSL ratings the same?

A: Yes. Both parts are ROHS3 compliant and carry MSL Level 1 (Unlimited) ratings, indicating equivalent environmental compliance and moisture sensitivity characteristics.

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

A: Both the CDC328ADG4 and CDC391D support a maximum frequency of 100 MHz for clock distribution applications.