Equivalent & Substitute Parts for 2308A-2DCG

Part Overview

The 2308A-2DCG is a Multiplier, Zero Delay Buffer IC manufactured by Renesas Electronics Corporation, operating at a maximum frequency of 133.3MHz in a 16-SOIC package. This component is classified as Obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and procurement planning. The part features a 1:8 input-to-output ratio with integrated PLL and bypass capability, designed for LVTTL signal environments with 3V to 3.6V supply voltage operation.

Key Parameters

Parameter	Value
Manufacturer Part Number	2308A-2DCG
Manufacturer	Renesas Electronics Corporation
Category	Clock/Timing
Type	Multiplier, Zero Delay Buffer
Frequency - Max	133.3MHz
Ratio - Input:Output	1:8
Input Signal Type	LVTTL
Output Signal Type	LVTTL
PLL	Yes with Bypass
Voltage - Supply	3V ~ 3.6V
Operating Temperature	0°C ~ 70°C
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the 2308A-2DCG is determined by the following critical parameters: package type (16-SOIC form factor), supply voltage compatibility (3V to 3.6V), signal interface type (LVTTL input and output), PLL with bypass functionality, and frequency capability sufficient for 133.3MHz operation. The input-to-output ratio of 1:8 and single-circuit configuration define the functional scope.

Substitute parts are grouped into two categories:

Parametric Equivalent (Same Package, Identical Electrical Characteristics): The 2308-2DCG maintains identical electrical specifications and package form factor, differing only in packaging format (Tube vs. standard packaging) and moisture sensitivity level.

Functional Equivalent (Different Package, Enhanced Capability): The 8T49N240-998NLGI provides superior frequency performance (867MHz) and extended temperature range (-40°C to 85°C) but requires evaluation for package compatibility due to its 40-VFQFN form factor.

Pin-Compatible Alternative (Same Package, Similar Functionality): The CDCVF25081D and CDCVF25081DR from Texas Instruments share the 16-SOIC package and LVTTL interface but operate as PLL Clock Drivers with different input-to-output ratios (2:8) and higher maximum frequency (200MHz).

Parameter Comparison

Parameter	2308A-2DCG	2308-2DCG	CDCVF25081D	CDCVF25081DR	8T49N240-998NLGI
Manufacturer	Renesas	Renesas	Texas Instruments	Texas Instruments	Renesas
Type	Multiplier, Zero Delay Buffer	Multiplier, Zero Delay Buffer	PLL Clock Driver	PLL Clock Driver	Jitter Attenuator
Frequency - Max	133.3MHz	133.3MHz	200MHz	200MHz	867MHz
Ratio - Input:Output	1:8	1:8	2:8	2:8	2:4
Input Signal Type	LVTTL	LVTTL	LVTTL	LVTTL	LVCMOS, LVDS, LVHSTL, LVPECL, Crystal
Output Signal Type	LVTTL	LVTTL	LVTTL	LVTTL	HCSL, LVCMOS, LVDS, LVPECL
PLL	Yes with Bypass	Yes with Bypass	Yes with Bypass	Yes with Bypass	Yes
Voltage - Supply	3V ~ 3.6V	3V ~ 3.6V	3V ~ 3.6V	3V ~ 3.6V	1.71V ~ 3.465V
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	16-SOIC	16-SOIC	16-SOIC	16-SOIC	40-VFQFN Exposed Pad
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): The 2308-2DCG is the primary parametric equivalent, maintaining all electrical characteristics and 16-SOIC package compatibility. Both parts are Obsolete status; however, the 2308-2DCG offers improved moisture sensitivity level (MSL 1 vs. MSL 3) and higher inventory availability (1496 Pcs vs. 1028 Pcs).

For Active Product Substitution: The CDCVF25081D and CDCVF25081DR from Texas Instruments are Active status alternatives sharing the 16-SOIC package and LVTTL interface. These parts support higher maximum frequency (200MHz) and extended operating temperature range (-40°C to 85°C). The input-to-output ratio differs (2:8 vs. 1:8), requiring functional verification in the target application. CDCVF25081DR offers superior inventory availability (6351 Pcs) in Tape & Reel packaging.

For High-Frequency Applications: The 8T49N240-998NLGI provides significantly enhanced frequency capability (867MHz) and extended temperature range, classified as Active status. This part requires PCB layout redesign due to 40-VFQFN package format and supports multiple input signal types (LVCMOS, LVDS, LVHSTL, LVPECL, Crystal) with flexible output options. Substitution is applicable only when system architecture permits package migration.

All substitute parts maintain ROHS3 compliance and EAR99 export classification consistent with the original component.

Frequently Asked Questions (FAQ)

Q: Can the 2308-2DCG directly replace the 2308A-2DCG without circuit modification?

A: Yes. The 2308-2DCG is a parametric equivalent with identical electrical specifications, supply voltage range (3V to 3.6V), frequency capability (133.3MHz), input-to-output ratio (1:8), and 16-SOIC package form factor. Both parts are Obsolete status. Packaging format differs (Tube vs. standard), and moisture sensitivity level is improved in the 2308-2DCG (MSL 1 vs. MSL 3).

Q: Are the Texas Instruments CDCVF25081D and CDCVF25081DR pin-compatible with the 2308A-2DCG?

A: Both parts share the 16-SOIC package and LVTTL signal interface. However, the input-to-output ratio differs (2:8 vs. 1:8), and maximum frequency is higher (200MHz vs. 133.3MHz). Pin-level compatibility requires verification against the specific application schematic. These parts are Active status with extended operating temperature range (-40°C to 85°C).

Q: What are the key differences between CDCVF25081D and CDCVF25081DR?

A: Both parts are functionally identical PLL Clock Drivers with 200MHz maximum frequency and 16-SOIC package. The primary difference is packaging format: CDCVF25081D is supplied in Tube, while CDCVF25081DR is supplied in Cut Tape (CT) & Digi-Reel® format. CDCVF25081DR offers significantly higher inventory availability (6351 Pcs vs. 1160 Pcs) and is classified as Tape & Reel (TR) packaging.

Q: Is the 8T49N240-998NLGI suitable as a direct substitute?

A: The 8T49N240-998NLGI is a functional alternative for applications requiring higher frequency performance (867MHz) and extended temperature range (-40°C to 85°C). However, direct substitution is not recommended without circuit redesign. The part uses a 40-VFQFN package (vs. 16-SOIC), requires different PCB layout, and operates as a Jitter Attenuator with multiple input signal type support (LVCMOS, LVDS, LVHSTL, LVPECL, Crystal). Evaluation is necessary to confirm compatibility with the target system architecture.

Q: What is the significance of the Obsolete status for the 2308A-2DCG?

A: Obsolete status indicates the manufacturer has discontinued production. The 2308-2DCG is also Obsolete, while CDCVF25081D, CDCVF25081DR, and 8T49N240-998NLGI are Active status parts. For new designs or long-term procurement, Active status alternatives are recommended to ensure sustained availability and manufacturer support.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. All listed substitute parts (2308-2DCG, CDCVF25081D, CDCVF25081DR, and 8T49N240-998NLGI) are ROHS3 Compliant and REACH Unaffected, maintaining environmental regulatory alignment with the original 2308A-2DCG component.

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