Equivalent & Substitute Parts for Renesas 2308-4DCGI8

Part Overview

The Renesas 2308-4DCGI8 is a Multiplier, Zero Delay Buffer IC designed for clock/timing applications with a maximum frequency of 133.3MHz and an 1:8 input-to-output ratio. This device operates with LVTTL input and output levels, supporting a supply voltage range of 3V to 3.6V, and is housed in a 16-SOIC package.

The 2308-4DCGI8 is classified as Obsolete. Due to its discontinued status, identifying functionally equivalent substitute components is essential for system redesign, board revision, or inventory replenishment in applications where this multiplier is currently deployed.

Key Parameters

Parameter	Value
Manufacturer	Renesas Electronics Corporation
Part Number	2308-4DCGI8
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
Voltage - Supply	3V ~ 3.6V
Operating Temperature	-40°C ~ 85°C
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
MSL Rating	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the 2308-4DCGI8 is determined by the following critical parameters:

Functional Requirements:

Clock multiplication capability with PLL support
Frequency handling capability at or above 133.3MHz
Input and output signal compatibility (LVTTL or compatible logic levels)
Single circuit configuration

Electrical Requirements:

Supply voltage range overlap or compatibility with 3V to 3.6V operation
Operating temperature range of -40°C to 85°C minimum
Compliance certifications: ROHS3, REACH Unaffected, EAR99

Physical Requirements:

Surface mount technology
Moisture sensitivity level MSL 3 or better

The substitute part 8T49N240-998NLGI8 meets these criteria as an active, functionally enhanced alternative from the same manufacturer with extended frequency capability, programmable multiplier/divider functionality, and broader signal compatibility options.

Parameter Comparison

Parameter	2308-4DCGI8 (Main Part)	8T49N240-998NLGI8 (Substitute)
Manufacturer	Renesas Electronics Corporation	Renesas Electronics Corporation
Category	Clock/Timing	Clock/Timing
Type	Multiplier, Zero Delay Buffer	Jitter Attenuator
Frequency - Max	133.3MHz	867MHz
PLL Support	Yes with Bypass	Yes
Number of Circuits	1	1
Voltage - Supply	3V ~ 3.6V	1.71V ~ 3.465V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount
Package / Case	16-SOIC (0.154", 3.90mm Width)	40-VFQFN Exposed Pad (6x6)
Product Status	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	3 (168 Hours)	3 (168 Hours)
REACH Status	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99

Engineering Selection Recommendations

The 8T49N240-998NLGI8 is an active substitute for the obsolete 2308-4DCGI8. Both components are manufactured by Renesas Electronics Corporation and maintain identical compliance certifications (ROHS3, REACH Unaffected, EAR99) and moisture sensitivity ratings (MSL 3).

The substitute part offers extended frequency capability (867MHz versus 133.3MHz) and enhanced jitter attenuation functionality, making it suitable for applications requiring higher-frequency clock distribution. The supply voltage range of the substitute (1.71V to 3.465V) encompasses the original part's 3V to 3.6V requirement, ensuring electrical compatibility in standard 3.3V systems.

The primary design consideration is the package change from 16-SOIC to 40-VFQFN, which requires PCB layout modification. The substitute's larger pin count and different footprint necessitate schematic and board redesign but provide additional circuit configuration flexibility through programmable divider/multiplier settings.

Both parts maintain the same operating temperature range (-40°C to 85°C), ensuring thermal compatibility in equivalent application environments.

Frequently Asked Questions (FAQ)

Q: Can the 8T49N240-998NLGI8 directly replace the 2308-4DCGI8 without PCB modification?

A: No. The substitute uses a 40-VFQFN package compared to the original 16-SOIC package. PCB layout and footprint redesign are required. However, electrical functionality is compatible within the specified operating parameters.

Q: What is the primary functional difference between these parts?

A: The 2308-4DCGI8 is a fixed-ratio multiplier with an 1:8 input-to-output ratio. The 8T49N240-998NLGI8 is a programmable jitter attenuator with configurable divider/multiplier ratios (2:4 as specified), offering greater flexibility in clock distribution applications.

Q: Are the supply voltage ranges compatible?

A: Yes. The substitute's supply range (1.71V to 3.465V) fully encompasses the original part's 3V to 3.6V requirement. Standard 3.3V supply designs will operate both parts within specification.

Q: Do both parts meet the same compliance requirements?

A: Yes. Both components are ROHS3 compliant, REACH unaffected, classified as EAR99, and carry MSL 3 moisture sensitivity ratings with 168-hour limits.

Q: What is the frequency capability difference?

A: The original part operates to 133.3MHz maximum. The substitute operates to 867MHz maximum, providing significant headroom for higher-frequency clock applications while remaining backward-compatible with lower-frequency designs.

Q: Are the input and output signal types compatible?

A: The original part uses LVTTL for both input and output. The substitute supports multiple input types (LVCMOS, LVDS, LVHSTL, LVPECL, Crystal) and output types (HCSL, LVCMOS, LVDS, LVPECL), offering greater signal compatibility. LVTTL operation is supported through LVCMOS compatibility.

Q: What is the operating temperature range for both parts?

A: Both parts operate across -40°C to 85°C, ensuring identical thermal performance specifications.

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