CDC421212RGET Clock Generator IC Equivalent & Substitute Parts

Part Overview

The CDC421212RGET is a Clock Generator IC manufactured by Texas Instruments, operating at 212.5MHz with LVPECL output in a 24-VFQFN Exposed Pad package. This part is classified as Obsolete, which necessitates identification of active equivalent and substitute components for ongoing design support and procurement.

The CDC421212RGET features PLL-based clock generation with LVCMOS and Crystal inputs, 3V to 3.6V supply voltage operation, and -40°C to 85°C temperature range. Due to its obsolete status, active alternatives within the CDC421A series provide functional equivalence with maintained electrical and mechanical compatibility.

Key Parameters

Parameter	CDC421212RGET
Manufacturer	Texas Instruments
Type	Clock Generator
Frequency - Max	212.5MHz
Input	LVCMOS, Crystal
Output	LVPECL
PLL	Yes
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
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the CDC421212RGET is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

Package / Case: 24-VFQFN Exposed Pad (24-VQFN 4x4)
Voltage - Supply: 3V ~ 3.6V
Input: LVCMOS, Crystal
Output: LVPECL
Number of Circuits: 1
Ratio - Input:Output: 1:1
Differential - Input:Output: No/Yes
Operating Temperature: -40°C ~ 85°C
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 2 (1 Year)
REACH Status: REACH Unaffected

Frequency Consideration: The CDC421212RGET operates at 212.5MHz maximum frequency. Substitute parts are grouped by frequency capability. Parts with equal or higher maximum frequency ratings maintain full functional compatibility. Parts with lower frequency ratings operate within reduced bandwidth but maintain identical electrical interface characteristics.

All substitute parts listed are from the Texas Instruments CDC421A series and meet all critical matching parameters. Substitution is valid across all frequency variants within this series.

Parameter Comparison

Part Number	Frequency - Max	Voltage - Supply	Package / Case	Operating Temperature	Product Status	Inventory (Pcs)
CDC421212RGET	212.5MHz	3V ~ 3.6V	24-VFQFN Exposed Pad	-40°C ~ 85°C	Obsolete	690
CDC421A100RGER	100MHz	3V ~ 3.6V	24-VFQFN Exposed Pad	-40°C ~ 85°C	Active	1338
CDC421A100RGET	100MHz	3V ~ 3.6V	24-VFQFN Exposed Pad	-40°C ~ 85°C	Active	742
CDC421A106RGER	106.25MHz	3V ~ 3.6V	24-VFQFN Exposed Pad	-40°C ~ 85°C	Active	1878
CDC421A106RGET	106.25MHz	3V ~ 3.6V	24-VFQFN Exposed Pad	-40°C ~ 85°C	Active	824
CDC421A125RGER	125MHz	3V ~ 3.6V	24-VFQFN Exposed Pad	-40°C ~ 85°C	Active	3460
CDC421A125RGET	125MHz	3V ~ 3.6V	24-VFQFN Exposed Pad	-40°C ~ 85°C	Active	879
CDC421A156RGER	156.25MHz	3V ~ 3.6V	24-VFQFN Exposed Pad	-40°C ~ 85°C	Active	1311
CDC421A156RGET	156.25MHz	3V ~ 3.6V	24-VFQFN Exposed Pad	-40°C ~ 85°C	Active	882
CDC421A212RGER	212.5MHz	3V ~ 3.6V	24-VFQFN Exposed Pad	-40°C ~ 85°C	Active	1417
CDC421A212RGET	212.5MHz	3V ~ 3.6V	24-VFQFN Exposed Pad	-40°C ~ 85°C	Active	719

Engineering Selection Recommendations

Primary Recommendation: CDC421A212RGET and CDC421A212RGER are direct functional equivalents to the obsolete CDC421212RGET, operating at identical 212.5MHz frequency with matching electrical and mechanical specifications. Both parts are Active status with ROHS3 compliance and REACH Unaffected certification. CDC421A212RGER provides higher inventory availability (1417 Pcs) compared to CDC421A212RGET (719 Pcs).

Secondary Recommendations: CDC421A156RGER and CDC421A156RGET operate at 156.25MHz, providing 73.4% of the original frequency capability while maintaining all other electrical interface parameters. These parts are suitable for applications where the full 212.5MHz bandwidth is not required.

CDC421A125RGER and CDC421A125RGET operate at 125MHz, providing 58.8% of the original frequency capability. CDC421A125RGER offers the highest inventory level (3460 Pcs) among all substitutes.

CDC421A106RGER, CDC421A106RGET, CDC421A100RGER, and CDC421A100RGET provide lower frequency alternatives at 106.25MHz and 100MHz respectively, suitable only for applications with reduced bandwidth requirements.

All substitute parts maintain ROHS3 compliance, REACH Unaffected status, and MSL 2 (1 Year) moisture sensitivity rating, ensuring regulatory and environmental compatibility with the original design.

Frequently Asked Questions (FAQ)

Q: Can CDC421A212RGET directly replace CDC421212RGET? A: Yes. CDC421A212RGET is functionally equivalent with identical frequency (212.5MHz), supply voltage (3V ~ 3.6V), package (24-VFQFN Exposed Pad), input/output characteristics (LVCMOS/Crystal input, LVPECL output), and operating temperature range (-40°C ~ 85°C). The part is Active status with current inventory availability.

Q: What is the difference between RGET and RGER packaging designations? A: Both designations indicate Tape & Reel (TR) packaging in the 24-VQFN (4x4) format. The suffix variation reflects different tape reel configurations or manufacturing batches. Electrical and mechanical specifications are identical between RGET and RGER variants.

Q: Can lower frequency variants (100MHz, 106.25MHz, 125MHz, 156.25MHz) be used as substitutes? A: Lower frequency variants maintain identical electrical interface characteristics (supply voltage, input/output logic levels, package, temperature range) and are mechanically compatible. Selection depends on application bandwidth requirements. If the system clock frequency requirement is lower than the original 212.5MHz specification, lower frequency variants are suitable substitutes.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All CDC421A series substitutes listed are ROHS3 Compliant with REACH Unaffected status, matching the original CDC421212RGET compliance profile.

Q: What is the Moisture Sensitivity Level (MSL) for substitute parts? A: All substitute parts maintain MSL 2 (1 Year) rating, identical to the original part. This indicates standard moisture sensitivity with one-year floor life from bag opening under controlled conditions.

Q: Which substitute offers the best inventory availability? A: CDC421A125RGER provides the highest inventory level at 3460 Pcs. For frequency-matched substitution at 212.5MHz, CDC421A212RGER offers 1417 Pcs availability.

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