CDC319DBRG4 Equivalent & Substitute Parts

Part Overview

The CDC319DBRG4 is a clock fanout buffer (distribution) integrated circuit manufactured by Texas Instruments, designed for 1:10 clock distribution applications with a maximum frequency of 100 MHz. This device features LVTTL input and LVTTL/TTL output compatibility, housed in a 28-SSOP surface mount package. The CDC319DBRG4 is discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing production and maintenance applications requiring this clock distribution functionality.

Substiute Parts

CDC319DBRG4

Texas InstrumentsIn Stock: 889CDC319DBRG4 Datasheet

Current PartRFQ

CDC319DBR

Texas InstrumentsIn Stock: 5656CDC319DBR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the CDC319DBRG4 is determined by strict equivalence across the following critical parameters:

• Base product number (CDC319)
• Fanout buffer type with 1:10 distribution ratio
• Maximum frequency of 100 MHz
• LVTTL input and LVTTL/TTL output compatibility
• Supply voltage range of 3.135V ~ 3.465V
• Operating temperature range of 0°C ~ 70°C
• 28-SSOP surface mount package
• ROHS3 compliance and MSL Level 1 rating

The CDC319DBR is a direct equivalent substitute, differing only in packaging format (Tape & Reel versus bulk packaging) and product status (Active versus Discontinued). All electrical and mechanical specifications remain identical.

Parameter Comparison

Engineering Selection Recommendations

The CDC319DBR is a direct functional and electrical equivalent to the CDC319DBRG4. Both parts share identical electrical specifications, package geometry, and compliance certifications (ROHS3, MSL Level 1). The primary distinction is product status: the CDC319DBRG4 is discontinued, while the CDC319DBR remains in active production with significantly higher inventory availability (5596 units versus 846 units).

For new designs and ongoing production requirements, the CDC319DBR is the appropriate selection. The Tape & Reel packaging format of the CDC319DBR is standard for high-volume manufacturing and automated assembly processes. Both parts maintain full compatibility with existing PCB layouts and assembly procedures designed for the 28-SSOP package.

Frequently Asked Questions (FAQ)

Q: Can the CDC319DBR be used as a direct replacement for the CDC319DBRG4?

A: Yes. The CDC319DBR is electrically and mechanically identical to the CDC319DBRG4. Both devices provide 1:10 clock distribution at 100 MHz with LVTTL input and LVTTL/TTL output in a 28-SSOP surface mount package. The only differences are product status (Active versus Discontinued) and packaging format (Tape & Reel versus bulk).

Q: What is the significance of the packaging format difference?

A: The CDC319DBRG4 uses bulk packaging, while the CDC319DBR uses Tape & Reel (TR) format. Tape & Reel packaging is standard for automated pick-and-place assembly and is preferred for production environments. Both formats contain identical die and electrical performance.

Q: Are there any compliance or certification differences between these parts?

A: No. Both the CDC319DBRG4 and CDC319DBR carry identical ROHS3 compliance and MSL Level 1 ratings. They meet the same regulatory and environmental standards.

Q: Why is the CDC319DBRG4 discontinued?

A: The CDC319DBRG4 has been discontinued at DiGi Electronics. The CDC319DBR remains in active production and is the recommended part for current applications.

Q: What are the critical parameters for substitution compatibility?

A: Substitution compatibility is determined by: 1:10 fanout ratio, 100 MHz maximum frequency, LVTTL input/LVTTL-TTL output, 3.135V–3.465V supply voltage, 0°C–70°C operating temperature, and 28-SSOP surface mount package. Any deviation in these parameters indicates incompatibility.