CDC421250RGET Clock Generator IC Equivalent & Substitute Parts

Part Overview

The CDC421250RGET is a Clock Generator IC manufactured by Texas Instruments, operating at a maximum frequency of 250MHz with LVPECL output. This device features a single circuit with 1:1 input-to-output ratio, PLL capability, and operates across a 3V to 3.6V supply range in a 24-VFQFN Exposed Pad surface mount package.

The CDC421250RGET is classified as Obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for production and field replacement applications. Substitute parts maintain electrical and mechanical compatibility while offering active product status and continued manufacturer support.

Key Parameters

Parameter	CDC421250RGET
Manufacturer	Texas Instruments
Type	Clock Generator
Frequency - Max	250MHz
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
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the CDC421250RGET are selected based on strict electrical and mechanical compatibility criteria. All substitute parts maintain the following parameters identical to the main part:

Manufacturer: Texas Instruments
Type: Clock Generator
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

The primary variable parameter across substitute parts is Frequency - Max, which ranges from 100MHz to 212.5MHz. All substitute parts are classified as Active products with current manufacturer support, providing superior availability compared to the Obsolete CDC421250RGET.

Parameter Comparison

Part Number	Frequency - Max	Product Status	Packaging	Inventory (Pcs)
CDC421250RGET	250MHz	Obsolete	Tape & Reel (TR)	1425
CDC421A100RGER	100MHz	Active	Tape & Reel (TR)	1338
CDC421A100RGET	100MHz	Active	Tape & Reel (TR)	742
CDC421A106RGER	106.25MHz	Active	Tape & Reel (TR)	1878
CDC421A106RGET	106.25MHz	Active	Tape & Reel (TR)	824
CDC421A125RGER	125MHz	Active	Tape & Reel (TR)	3460
CDC421A125RGET	125MHz	Active	Tape & Reel (TR)	879
CDC421A156RGER	156.25MHz	Active	Tape & Reel (TR)	1311
CDC421A156RGET	156.25MHz	Active	Tape & Reel (TR)	882
CDC421A212RGER	212.5MHz	Active	Tape & Reel (TR)	1417
CDC421A212RGET	212.5MHz	Active	Tape & Reel (TR)	719

Engineering Selection Recommendations

All listed substitute parts are Active products with current Texas Instruments support and ROHS3 compliance, providing superior long-term availability compared to the Obsolete CDC421250RGET. Selection among substitute parts depends on application frequency requirements:

For applications requiring maximum frequency operation below 250MHz, CDC421A212RGER and CDC421A212RGET provide the highest frequency capability at 212.5MHz while maintaining all electrical and mechanical specifications of the original part. These parts offer the closest performance envelope to the CDC421250RGET.

For applications with lower frequency requirements, CDC421A156RGER, CDC421A156RGET, CDC421A125RGER, CDC421A125RGET, CDC421A106RGER, CDC421A106RGET, CDC421A100RGER, and CDC421A100RGET provide equivalent functionality at reduced frequency ratings. All parts maintain identical supply voltage, operating temperature range, package configuration, and compliance certifications.

Packaging variants ending in RGER and RGET indicate different tape and reel configurations. Selection between these variants depends on procurement and assembly line requirements.

Frequently Asked Questions (FAQ)

Q: Can CDC421A212RGET replace CDC421250RGET in all applications?

A: CDC421A212RGET maintains identical electrical and mechanical specifications to CDC421250RGET except for maximum frequency operation. Applications operating at frequencies below 212.5MHz can use CDC421A212RGET as a direct substitute. Applications requiring operation above 212.5MHz cannot use any listed substitute parts.

Q: What is the difference between RGER and RGET packaging variants?

A: Both RGER and RGET designations indicate Tape & Reel packaging. The suffix difference reflects Texas Instruments internal packaging configuration codes. Both variants are mechanically and electrically identical and compatible with standard surface mount assembly equipment.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and REACH Unaffected status, matching the environmental compliance profile of the CDC421250RGET.

Q: What is the Moisture Sensitivity Level (MSL) for substitute parts?

A: All substitute parts maintain MSL 2 (1 Year) rating, identical to the CDC421250RGET. This specification defines storage and handling requirements prior to assembly.

Q: Can lower frequency parts operate at higher frequencies if required?

A: No. The Frequency - Max parameter defines the maximum guaranteed operating frequency for each part. Parts rated at lower frequencies cannot be operated above their specified maximum frequency rating.

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