CDCE431Y Clock Generator IC Equivalent & Substitute Parts

Part Overview

The CDCE431Y is a Clock Generator IC manufactured by Texas Instruments, designed for 1.2GHz clock generation applications. This die-sale package component features PLL functionality with LVCMOS/Crystal inputs and LVDS/LVPECL outputs. The part is currently obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. The CDCE431Y operates within a 3V to 3.6V supply range and supports operating temperatures from -40°C to 85°C.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Part Number	CDCE431Y
Category	Clock/Timing
Type	Clock Generator
Frequency - Max	1.2GHz
PLL	Yes
Input Type	LVCMOS, Crystal
Output Type	LVDS, LVPECL
Number of Circuits	1
Ratio - Input:Output	1:1
Voltage - Supply	3V ~ 3.6V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	Die
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the CDCE431Y is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Frequency - Max: 1.2GHz
PLL: Yes
Input Type: LVCMOS, Crystal
Output Type: LVDS, LVPECL
Number of Circuits: 1
Ratio - Input:Output: 1:1
Voltage - Supply: 3V ~ 3.6V
Operating Temperature: -40°C ~ 85°C
RoHS Status: ROHS3 Compliant

Allowed Variations:

Package / Case: Die form factors may differ (Diesale, Wafersale, or packaged alternatives)
Product Status: Active or Discontinued alternatives are acceptable
MSL Rating: May vary based on package type
Divider/Multiplier capability: May differ

Two substitute parts meet these criteria: CDCE421ARGET (packaged alternative) and CDCE421YS (die-form alternative).

Parameter Comparison

Parameter	CDCE431Y	CDCE421ARGET	CDCE421YS
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments
Category	Clock/Timing	Clock/Timing	Clock/Timing
Type	Clock Generator	Clock Generator	Clock Generator
Frequency - Max	1.2GHz	1.2GHz	1.2GHz
PLL	Yes	Yes	Yes
Input Type	LVCMOS, Crystal	LVCMOS, Crystal	LVCMOS, Crystal
Output Type	LVDS, LVPECL	LVDS, LVPECL	LVDS, LVPECL
Number of Circuits	1	1	1
Ratio - Input:Output	1:1	1:1	1:1
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	Die	24-VFQFN Exposed Pad	Die
Product Status	Obsolete	Active	Discontinued at DiGi Electronics
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	2 (1 Year)	1 (Unlimited)

Engineering Selection Recommendations

CDCE421ARGET is the primary substitute for applications requiring a packaged component. This part is currently active in production and available in 24-VFQFN Exposed Pad configuration. It maintains full electrical equivalence to the CDCE431Y across all critical parameters and carries ROHS3 compliance. The packaged format eliminates die-handling requirements and provides standard surface-mount assembly compatibility. MSL rating of 2 (1 Year) is standard for this package type.

CDCE421YS serves as an alternative for die-form applications. This part maintains identical electrical specifications and die-level packaging equivalent to the CDCE431Y. It carries MSL rating of 1 (Unlimited), matching the original part's moisture sensitivity profile. Product status is Discontinued at DiGi Electronics; availability should be confirmed before design commitment.

Both substitutes are ROHS3 compliant and REACH unaffected, maintaining regulatory compliance with the original CDCE431Y.

Frequently Asked Questions (FAQ)

Q: Can CDCE421ARGET replace CDCE431Y in existing designs? A: Yes. CDCE421ARGET provides full electrical equivalence across frequency, PLL functionality, input/output types, supply voltage, and operating temperature range. The primary difference is packaging: CDCE421ARGET uses 24-VFQFN Exposed Pad instead of die form. PCB layout and assembly process modifications are required.

Q: What is the difference between CDCE421ARGET and CDCE421YS? A: Both parts are electrically equivalent to CDCE431Y. CDCE421ARGET is packaged in 24-VFQFN format and is currently active. CDCE421YS is supplied as a die (Wafersale) and is discontinued at DiGi Electronics. Selection depends on packaging requirements and availability.

Q: Are there any functional differences between the substitute parts and CDCE431Y? A: No. All three parts share identical specifications for frequency (1.2GHz), PLL capability, input/output signal types, supply voltage (3V-3.6V), and operating temperature range (-40°C to 85°C). Differences are limited to package form and product availability status.

Q: Does the MSL rating difference affect substitution? A: MSL rating reflects moisture sensitivity during storage and handling. CDCE431Y and CDCE421YS both have MSL 1 (Unlimited). CDCE421ARGET has MSL 2 (1 Year), which is standard for packaged components. This does not affect electrical performance or functional compatibility.

Q: Are all substitute parts RoHS compliant? A: Yes. CDCE431Y, CDCE421ARGET, and CDCE421YS are all ROHS3 compliant and REACH unaffected, maintaining regulatory equivalence.

Q: Which substitute should I select for new designs? A: CDCE421ARGET is recommended for new designs due to active production status and standard 24-VFQFN packaging. CDCE421YS is suitable only if die-form packaging is required and availability can be confirmed.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message