CDC421100RGET Clock Generator IC Equivalent & Substitute Parts

Part Overview

The CDC421100RGET is a Clock Generator IC manufactured by Texas Instruments, operating at 100MHz with a 24-VFQFN Exposed Pad package. This component generates precision clock signals for timing-critical applications using PLL technology with LVCMOS/Crystal inputs and LVPECL outputs.

The CDC421100RGET is classified as Obsolete. Locating equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs, repairs, and system upgrades.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Clock/Timing
Type	Clock Generator
Frequency - Max	100MHz
PLL	Yes
Input	LVCMOS, Crystal
Output	LVPECL
Number of Circuits	1
Ratio - Input:Output	1:1
Differential - Input:Output	No/Yes
Voltage - Supply	3V ~ 3.6V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	24-VFQFN Exposed Pad
Supplier Device Package	24-VQFN (4x4)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	2 (1 Year)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitute parts for the CDC421100RGET are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Matching Parameters:

Frequency - Max: 100MHz
Input: LVCMOS, Crystal
Output: LVPECL
Number of Circuits: 1
Ratio - Input:Output: 1:1
Differential - Input:Output: No/Yes
Voltage - Supply: 3V ~ 3.6V
Operating Temperature: -40°C ~ 85°C
Package / Case: 24-VFQFN Exposed Pad
Supplier Device Package: 24-VQFN (4x4)

The identified substitutes maintain identical electrical specifications and physical packaging, ensuring direct functional replacement without circuit redesign or board layout modification.

Parameter Comparison

Parameter	CDC421100RGET (Main)	CDC421A100RGET (Substitute)	CDC421A100RGER (Substitute)
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments
Category	Clock/Timing	Clock/Timing	Clock/Timing
Type	Clock Generator	Clock Generator	Clock Generator
Frequency - Max	100MHz	100MHz	100MHz
PLL	Yes	Yes	Yes
Input	LVCMOS, Crystal	LVCMOS, Crystal	LVCMOS, Crystal
Output	LVPECL	LVPECL	LVPECL
Number of Circuits	1	1	1
Ratio - Input:Output	1:1	1:1	1:1
Differential - Input:Output	No/Yes	No/Yes	No/Yes
Voltage - Supply	3V ~ 3.6V	3V ~ 3.6V	3V ~ 3.6V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	24-VFQFN Exposed Pad	24-VFQFN Exposed Pad	24-VFQFN Exposed Pad
Supplier Device Package	24-VQFN (4x4)	24-VQFN (4x4)	24-VQFN (4x4)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	2 (1 Year)	2 (1 Year)	2 (1 Year)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Obsolete	Active	Active
Packaging	Bulk	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

Both CDC421A100RGET and CDC421A100RGER are direct functional equivalents to the obsolete CDC421100RGET. Selection between these substitutes is based on product availability and packaging requirements:

CDC421A100RGET is designated as the MFR Recommended substitute, maintaining Active product status with 742 units in stock. This part is supplied in Tape & Reel packaging and carries full ROHS3 compliance and REACH Unaffected certification.

CDC421A100RGER is classified as a Parametric Equivalent with Active product status and higher inventory availability at 1,338 units in stock. This part is also supplied in Tape & Reel packaging with identical compliance certifications.

Both substitutes satisfy all electrical and mechanical requirements for direct replacement in applications currently using the CDC421100RGET. Selection should prioritize component availability and supply chain lead times.

Frequently Asked Questions (FAQ)

Q: Can CDC421A100RGET and CDC421A100RGER be used interchangeably with CDC421100RGET?

A: Yes. Both substitutes maintain identical electrical specifications, operating parameters, and physical packaging. Direct substitution is possible without circuit modification or board layout changes.

Q: What is the difference between CDC421A100RGET and CDC421A100RGER?

A: Both parts are parametrically equivalent with identical electrical and mechanical specifications. The primary difference is packaging format: both are supplied in Tape & Reel (TR). Inventory levels differ, with CDC421A100RGER offering higher stock availability.

Q: Why is CDC421100RGET classified as Obsolete?

A: The CDC421100RGET has reached end-of-life status. Texas Instruments has transitioned production to the CDC421A100 series, which maintains full backward compatibility while offering Active product status and continued manufacturing support.

Q: Are there any compliance or certification differences between the main part and substitutes?

A: No. All three parts maintain identical RoHS3 compliance, REACH Unaffected status, and Moisture Sensitivity Level (MSL) 2 ratings. Compliance certifications are equivalent across all variants.

Q: What packaging considerations apply to these substitutes?

A: The CDC421100RGET was supplied in bulk packaging. Both substitutes (CDC421A100RGET and CDC421A100RGER) are supplied in Tape & Reel format, which is standard for high-volume production and automated assembly processes. The 24-VQFN (4x4) physical package remains unchanged.

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